CN101997614A - Integrated transceiver, optical network system as well as optical communication system and method - Google Patents

Abstract

The invention discloses an integrated transceiver, an optical network system as well as an optical communication system and method. The integrated transceiver comprises an optical receiver, an optical transmitter, a first optical branching device, and a second optical branching device, wherein the optical receiver responds to a first optical signal and generates a first electrical signal at a receiving electrical interface; the optical transmitter responds to a second electrical signal received at a transmitting electrical interface, and transmits a second optical signal; the first optical branching device receives the first optical signal at a receiving optical interface, and guides at least one part of the first optical signal to the optical receiver; the second optical branching device guides the second optical signal to a transmitting optical interface. The first optical branching device guides at least one part of the first optical signal to the second optical branching device. The second optical branching device transmits the part of the first optical signal received from the first optical branching device to the transmitting optical interface. The integrated transceiver, the optical network system as well as the optical communication system and method of the invention can provide more reliable communication.

Description

Integrated optical transceiver, optical network system, optical communication system and method

Technical field

The present invention relates to optical communication field, the optical transceiver that relates in particular to optical network system and be used for this system.

Background technology

Popular along with the networking telephone (VoIP) and Web TV (IPTV), increasing user wishes and can insert these services from their guard station.Similarly, the business user also needs to be provided to the increasing bandwidth of their guard station now, and guarantees necessary service quality.In order to satisfy these needs, Virtual network operator is being set up the Optical Access Network with heterogeneous networks topology, such as FTTP, Fiber-To-The-Node, Fiber-To-The-Building with multiple different access transfer scheme (comprising BPON, EPON, GPON, WDM-PON and active Ethernet).Along with becoming, service provider's network becomes increasingly complex, for guaranteeing service-level agreement (SLA) and guarantee customer satisfaction, and service reliably and effective management of network become key challenge for the service provider.

Summary of the invention

According to a summary aspect, the present invention relates to a kind of integrated optical transceiver, it comprises: optical receiver, it generates first signal of telecommunication in response to first light signal at reception electrical interface place; Optical transmitting set, it launches second light signal in response to second signal of telecommunication that receives at emission electrical interface place; First optical branch device, it receives first light signal and at least a portion of first light signal is directed at optical receiver receiving the optical interface place; Second optical branch device, it is directed at the emission optical interface with second light signal.First optical branch device can be directed at least a portion of first light signal second optical branch device.Second optical branch device can be directed at the emission optical interface with this part first light signal that receives from first optical branch device.

According to another summary aspect, the present invention relates to a kind of optical communication system, it comprises first optical transceiver module, described first optical transceiver module comprises: the power-fail monitor, its be configured to detect in first optical transceiver module close on power-fail and when in first optical transceiver module, detecting time generation alarm for power-off (dying gasp) signal that closes on power-fail; First optical transmitting set, it is configured to comprise in the place's output of emission optical interface first light signal of alarm for power-off signal.Described optical communication system also comprises second optical transceiver module, described second optical transceiver module comprises: second receiver, and it is configured to export second signal of telecommunication by the optical link reception from first light signal that comprises the alarm for power-off signal of first optical transceiver and in response to first light signal; The alarm for power-off detector, it is configured to detect the alarm for power-off signal in first light signal or second signal of telecommunication.

According to another summary aspect, the present invention relates to a kind of optical network system, it comprises a plurality of first optical transceiver modules.Described first optical transceiver module comprises: first reflector, and it can export downlink optical signal with comprising the first downlink electrical signal of down user data in response to descending modulator control signal; First receiver, it can receive uplink optical signal, wherein said uplink optical signal comprises uplink user data and is loaded with the up modulation signal of up management information that wherein first receiver can be exported first signal of telecommunication that comprises up modulation signal and first uplink electrical signals that comprises uplink user data; First processing unit, it can generate the descending modulator control signal and demodulation first signal of telecommunication to extract up management information in response to down management information.Described optical network system also comprises first wavelength filter.Described first wavelength filter comprises: a plurality of first branch port, each first branch port is associated with one first optical transceiver module, and the downlink optical signal and first receiver in its first associated optical transceiver module that are configured to receive from first reflector in its first associated optical transceiver module send uplink optical signal, and wherein said each first branch port all is associated with wavelength channel; First public port, it can export the downlink optical signal that receives at arbitrary first branch port place.Described optical network system also comprises a plurality of second optical transceiver modules.Described second optical transceiver module comprises: second receiver, and it can receive downlink optical signal and export second signal of telecommunication, and wherein said second signal of telecommunication comprises descending modulator control signal and comprises the second downlink electrical signal of down user data; Second processing unit, its can demodulation second signal of telecommunication extracting down management information, and generate up modulator control signal in response to up management information; And second reflector, it can and comprise second uplink electrical signals of uplink user data and launch uplink optical signal in response to up modulator control signal.Described optical network system also comprises second wavelength filter, described second wavelength filter comprises: a plurality of second branch port, each second branch port are configured to receive from the uplink optical signal of one second optical transceiver module and to this second optical transceiver module and send downlink optical signal; Second public port, it can and receive downlink optical signal from first public port to first public port output uplink optical signal.

According to another summary aspect, the present invention relates to a kind of optical communication method that utilizes optical transceiver.This method comprises: generate first signal of telecommunication by optical receiver at reception electrical interface place in response to first light signal; Launch second light signal in response to second signal of telecommunication that receives at emission electrical interface place by optical transmitting set; Receive first light signal by first optical branch device at reception optical interface place; By first optical branch device at least a portion of first light signal is directed at optical receiver; By second optical branch device second light signal is directed at the emission optical interface; By first optical branch device at least a portion of first light signal is directed at second optical branch device; To be directed at the emission optical interface from this part first light signal that first optical branch device receives by second optical branch device.

According to another summary aspect, the present invention relates to a kind of optical communication method.This method comprises: detect the power-fail that closes in first optical transceiver module by the power-fail monitor; Produce the alarm for power-off signal when in first optical transceiver module, detecting when closing on power-fail by the power-fail monitor; First light signal that comprises the alarm for power-off signal in the place's output of emission optical interface; By first light signal that comprise alarm for power-off signal of the reception of second receiver in second optical transceiver module from first optical transceiver; Export second signal of telecommunication in response to first light signal; Detect alarm for power-off signal in first light signal or second signal of telecommunication by the alarm for power-off detector.

The execution mode of described system can comprise one or more in following.First optical branch device and second optical branch device can comprise optical splitter, optical switch or adjustable optical attenuator.Receive electrical interface and launch electrical interface and meet the industry standard that comprises SFF, SFP, XFP and SFP+.Receive electrical interface and launch electrical interface and can be inserted into mainframe network equipment.Integrated optical transceiver also can further comprise the power-fail monitor, described power-fail monitor be configured to detect in the integrated optical transceiver power-fail and when in the integrated optical transceiver module, detecting the time generation alarm for power-off signal that closes on power-fail, wherein said optical transmitting set is configured to export second light signal in response to the alarm for power-off signal at least in part.Can carry the alarm for power-off signal by envelope modulation in second light signal or on/off switch.

The embodiment of the invention may comprise one or more following advantages.By means of by setting up the directly monitoring reliably to optical communication that photosphere communication port (its not interference user data communication) obtains, disclosed system and method can provide more reliable communication.Disclosed system and method can be eliminated in some conventional optical network system the demand to boundary equipment.By being integrated in the function that comprises non-interfering type photosphere communication port, photosphere management and data feedback capability in the optical transceiver, the function of optical transceiver is strengthened.These functions are disabled in traditional optical transceiver.

In addition, under the situation of the main process equipment increase expense that user data and optical transceiver disclosed by the invention inserted, do not providing the photosphere management.Disclosed system and method does not need expensive device (such as numeral encapsulation or extra cooperative device) at customer rs premise.And disclosed optical transceiver meets the optical transceiver form of industry standard.Disclosed optical transceiver can be implemented as the device that the main process equipment that inserts from it receives electrical power.Disclosed optical transceiver is applicable to the multichannel light communication network, such as the optical-fiber network between optical terminus, remote node and the optical network unit.

In addition, disclosed system and method provides the ring of light to return, and except that the data loop fuction or when the data loop fuction is unavailable, the described ring of light returns the remote testing that allows optical link.The ring of light returns and can be implemented in the optical transceiver device and work during power-fail." alarm for power-off " monitors, report and detect by response more fast photosphere communicate by letter and provide.

Though with reference to a plurality of embodiment and specifically illustrate and described the present invention, those skilled in the relevant art should be understood that, can carry out change on various forms and the details to it, and without departing from the spirit and scope of the present invention.

Description of drawings

Fig. 1 is the block diagram that comprises the optical network system of a pair of transceiver on the point-to-point optical fiber link.

Fig. 2 is the block diagram that comprises the optical network system of intelligent optical transceiver.

Fig. 3 illustrates the exemplary optical network system with insertable intelligence optical transceiver.

Fig. 4 is the example block diagram with intelligent optical transceiver of integrated photosphere managerial ability.

Fig. 5 is the example block diagram with intelligent optical transceiver of integrated photosphere managerial ability and data loop fuction.

Fig. 6 A has integrated photosphere managerial ability and the example block diagram of the intelligent optical transceiver that the ring of light returns function.

Fig. 6 B and 6C illustrate the exemplary optical branch apparatus that is fit to intelligent optical transceiver among Fig. 6 A.

Fig. 7 illustrates the illustrative embodiments that monitors " alarm for power-off " in the optical network system at photosphere.

Fig. 8 has integrated photosphere managerial ability and returns and the example block diagram of the intelligent optical transceiver of other diagnostic functions such as alarm for power-off such as teledata loopback, the ring of light.

Fig. 9 illustrates the multichannel light network system that comprises the intelligent optical transceiver with photosphere managerial ability.

Embodiment

With reference to figure 1, optical network system 100 comprises the network equipment 101 and 102 that is installed in diverse location, and they can communicate with light signal by optical link 103.Optical link 103 can comprise single optical fiber for example or comprise the optical cable of a branch of optical fiber.The network equipment 101 comprises optical transceiver 110, data processing unit 114 and administration module 112, optical transceiver 110 is configured to carry out the conversion between the light signal and the signal of telecommunication, data processing unit 114 can process communication signals, and administration module 112 monitors and the function of control network devices 101.Equally, the network equipment 102 comprises optical transceiver 120, data processing unit 124 and administration module 122, optical transceiver 120 can be carried out the conversion between the light signal and the signal of telecommunication, and data processing unit 124 can process communication signals, and administration module 122 monitors and the function of control network devices 102.Alternatively, the whole network system 100 of upper layer network management system 105 management.

For instance, optical network system 100 can be the network of telecommunications service or ISP.The network equipment 101 can be positioned at service provider's central apparatus place, and is managed by network management system 105 by administration module 112.Interface 106 between network management system 105 and the administration module 112 can comprise for example interface of RS232 control desk, ethernet port and other types.The network equipment 102 can be positioned at the remote location such as customer rs premise.Network management system 105 can only remotely be managed remote equipment 102 in local management equipment 101.In certain embodiments, on down direction (from the central office to the customer rs premise), management information can be sent to administration module 112 from network management system 105 by interface 106, is sent to data processing unit 114 by communication interface 118 then.Data processing unit 114 is handled the down management information, sends the signal of telecommunication that not only comprises user data but also comprise down management information to optical transceiver 110 then.

In this manual, term " user data " refers to the data that are loaded with the information that will be transmitted between for example service provider and client.For example, " user data " can be included in video data, speech data and the e-mail data that transmits between the difference in the optical communication network.Compare with " user data ", " management data " only is used for guaranteeing the true(-)running of optical-fiber network by equipment.

Administration module 112 also can by communication interface 116 directly and optical transceiver 110 communicate.Optical transceiver 110 is a downlink optical signal with the downlink electrical conversion of signals.Optical transceiver 120 receives downlink optical signal via optical link 103, and downlink optical signal is changed back the downlink electrical signal.Data processing unit 124 is from from extracting down management information the downlink electrical signal of optical transceiver 120, and sends the down management information by communication interface 128 to administration module 122.On up direction, up management information adopts from the opposite path of administration module 122 by the Zhongdao network management system 105 of data processing unit 124, optical transceiver 120, optical transceiver 110, data processing unit 114 and administration module 112.

In above-mentioned layout, the bandwidth of the optical link 103 between management data and the user data shared network equipment 101 and the network equipment 102.The communication mode of this management data is known as " in the band " tunneling traffic." in the band " management can be embodied as the dedicated management expense in the Frame,, perhaps be embodied as the numeral encapsulation of encapsulated user data such as Ethernet OAM (operation management maintenance).Under one situation of back, the data rate of formed optical link 103 is higher than user data rate." in the band " passage has some shortcomings.At first, have in Frame under the situation of dedicated management expense, because bandwidth is assigned to management data, so the bandwidth of user data has reduced.Under the situation of numeral encapsulation, the data processing chip of complex and expensive must be added in the system.Secondly, the network equipment 101 and the network equipment 102 must interconnect fully.Yet, interconnection and interflow between the network equipment 101 and 102 might not always exist, because they have usually that different manufacturing has with different grades (carrier-class is to enterprise-level), by different mechanism (for example service provider and client) period and operation, safeguard (carrier-class is to enterprise-level) by different programs.In order to guarantee to interconnect, industry customer rs premise install belong to the service provider all and by its extra interconnecting and interworking equipment of safeguarding.This way all will be paid very big cost on equipment cost and operation complexity.

With reference to figure 2, in certain embodiments, optical communication system 200 comprises thenetwork equipment 201 and 202 that is installed in diverse location, and they connect by optical link 203.Thenetwork equipment 201 comprises intelligentoptical transceiver 210, data processing unit 214 andadministration module 212, and 214 pairs of communication datas of data processing unit are handled, andadministration module 212 monitors and control network devices 201.Equally, the network equipment 202 comprises intelligent optical transceiver 220, data processing unit 224 and administration module 222, and 224 pairs of communication datas of data processing unit are handled, and administration module 222 monitors and control network devices 202.

Optical transceiver 210 and 220 comprises modulator-demodulator 211 and 221 respectively.Descending and the upstream data. signals that modulator-demodulator 211 and 221 is configured betweenoptical transceiver 210 and 220 applies the non-interfering type modulation and should modulate recovery.Modulator-demodulator 211 and 221 is the processing units that can carry out the modulation and demodulation function.The modulation and demodulation function can be embodied as integrated circuit, perhaps be embodied as the software application that on memory, is stored as firmware.Processing unit can comprise one or more processing unit.

In this manual, " non-interfering type modulation " refer to the negligible modulation of influence to the user data between optical transceiver in the optical communication system.For example, the non-interfering type modulation can comprise the envelope modulation that the frequency that the light data-signal is carried out is lower, amplitude is less.Here envelope refers to the track of the amplitude peak of light data-signal.The light data-signal can be compared the amplitude that described secondary modulation changes envelope more slowly with the bit rate of this carrier wave as the carrier wave of secondary modulation.Light signal with user data is compared, and the amplitude of envelope modulation can remain less relatively.Should be understood that, only be exemplary execution mode to the envelope modulation by a small margin of user data signal.Disclosed system and method can adopt other modulation and demodulation technology, such as but not limited to: frequency modulation(FM) and phase modulated.

Morning, described " in the band " communication means compared with, and the modulation of integrated optical modem 211 and 221 pairs of light signals can be ignored to the influence of user data transmission.There are not to change packet and data rate by the user data of optical link 203.In other words, optical modem 211 and 221 can realize that " transparent " or " band is outer " manage in the mode of non-interference in optical communication system 200.Link 204 between the optical modem 211 and 221 is communication ports.In this manual,optical transceiver 210 and 220 can be called intelligent optical transceiver, this is because they comprise the not available intelligent element of conventional transceiver.

Optical communication system 200 can be by network management unit 205 management.Down management information in the optical communication system 200 is sent toadministration module 212 from network management unit 205 by management interface 206.Management interface 206 can be RS232 control desk, ethernet port or other types interface.Down management information is sent to intelligentoptical transceiver 210 bycommunication interface 216 subsequently, andcommunication interface 216 can be I²C (between integrated circuit, inter-integrated circuit) interface.211 pairs of down management information of optical modem in the intelligence optical transceiver are handled.Optical modem 211 is used the non-interfering type modulation that comprises management information to the downlink optical signal that is generated by intelligentoptical transceiver 210 subsequently.Downlink optical signal is received by optical transceiver 220 after propagating by optical link 203.Optical modem 221 extracts down management information from downlink optical signal by the demodulation downlink optical signal.Down management information is sent to administration module 222 by communication interface 226 subsequently.Equally, up management information can adopt from administration module 222 through optical transceivers 220,optical transceiver 210 and theadministration module 212 final opposite paths of direction that arrive network management units 205.Thereby optical communication system 200 has the managerial ability of expansion, and the managerial ability of this expansion is transparent and non-interfering type to user data.

The management data signal can be generated by administration module 212,222 and optical transceiver 210,220.For example, optical transceiver 210,220 is can time-triggered report current transmits and receives luminous power, and they can be used to analyze descending and link-quality uplink optical fibers.When passing the significant deterioration of generation in time, warning information can be sent to network management unit 205.Except the state of monitor optical transceiver 210,220, other states of administration module 212,222 all right watch-dogs 201,202.For example, the running status of data processing unit 224 can be reported to network management unit 205 by the non-interfering type management channels.

In certain embodiments, network management unit 205 is in response to up supervisory signal that modulator-demodulator 211 extracted and generate at least a portion down management signal.For example, power on for the first time and during theequipment 201 of being connected to, administration module 222 can generate registration information, and sends it to modulator-demodulator 211 bylink 204 when equipment 202.The modulated demodulator 211 of described registration information extracts, and is sent to network management unit 205.Network management unit 205 produces the affirmation information that will return to administration module 222.

Optical communication system 200 provides the communication port of the management data that is used for photosphere (or layer 1) under need not to transmit and handle the situation of the management data in the upper strata.Therefore optical communication system 200 and disclosed other system and method can provide " photosphere management ", promptly in photosphere generation, processing and transfer management data.The photosphere management can not cause the variation of user data transmission.For example, the not influence of sensitive layer management existence of the transmission rate of user data, data format and content (expense and Payload).

The network equipment of central office side and optical cable belong to the service provider usually to be owned.Far-end network equipment belong to usually the client all and manage by it.When administrative standard had different adaptedness, it is very difficult that network management and condition monitoring may become with operation and to " in the band " when two parts network equipment is had by different institutions.Prior, the cost height of network operation, this is (to refer to carry the assignment of the Service Technicians of necessary diagnostic tool, equipment and supplies to scene or customer rs premise, to be used for the location and to deal with problems) because " fault is patrolled and examined ".When network failure takes place when, for the service provider personnel, it is desirable to provide alarm signal by service provider's place or from its place accesses network management system with the localization of faults and failure cause.In other words, it is desirable to, the service provider not only can monitor and diagnose the equipment in the place that is positioned at the service provider, but also can monitor and diagnose the equipment that is positioned at customer rs premise.

In some cases, the service provider can dispose boundary equipment at customer rs premise and realize required telemanagement ability.Boundary equipment is a kind of network-termination device (NTE) that the service provider has, so it can communicate with the equipment with the ability that interconnects fully in service provider place.By boundary equipment, management data can be inserted in the user data and with it and from user data, extract.Though increased cost, boundary equipment can help managing network, reduce operation expenditure and service implementation grade agreement (SLA).

Disclosed intelligent optical transceiver can be exempted the needs to this boundary equipment, thereby provides simplification, flexibility and low cost aspect can and safeguarding at the structure of optical communication network.In certain embodiments, with reference to figure 3,optical communication system 300 comprises thenetwork equipment 201 that is arranged in the service provider place, the insertable intelligence optical transceiver 320 that is inserted into thenetwork equipment 302 that is positioned at far-end (such as customer rs premise).Pluggable optical transceiver 320 can communicate by theelectrical interface 322 and the network equipment 302.For example, thenetwork equipment 302 can be the Ethernet switch of enterprise.Pluggable optical transceiver 320 can be SFP (SFP) optical transceiver, and described SFP optical transceiver comprises integrated aforesaid modulator-demodulator, and can be inserted in the standard SFP slot on enterprise's Ethernet switch.In this case, the electrical interface of optical transceiver, optical interface, mechanical interface and control interface meet MSA (multi-source agreement) standard.Can make intelligent optical transceiver meet other industry standard and standard, for example GBIC, SFF, SFP, XFP, X2, XENPAK and SFP+.

Thenetwork equipment 201 comprises intelligentoptical transceiver 210, data processing unit 214 andadministration module 212, and 214 pairs of communication datas of data processing unit are handled, and 212 pairs ofnetwork equipments 201 of administration module monitor and control.Intelligenceoptical transceiver 210 carries out optical communication byoptical link 203 and pluggable optical transceiver 320.Intelligenceoptical transceiver 210 comprises modulator-demodulator 211, can insert optical transceiver 320 and comprise modulator-demodulator 321.In certain embodiments,optical transceiver 210 can also be inserted into the network equipment that is arranged in the central office.As mentioned above, can transmit management by modulator-demodulator 211 and 321 via non-interferingtype management channels 204 to thenetwork equipment 201 and the network equipment 302.In certain embodiments, can come the bearer management data by the relative low speed and the envelope modulation by a small margin of the light signal that is loaded with user data, and come the recovery management data by this envelope modulation of demodulation.Intelligent optical transceiver 320 can be visited and manage to network management unit 205.

Management data signal in theoptical communication system 300 can be generated by various communicators or parts, for example network management unit 205,administration module 212, intelligentoptical transceiver 210 and pluggable optical transceiver 320.Equipment 302, promptly the main frame of insertable optical transceiver 320 can belong to different institutions and own.As mentioned above,equipment 302 need not to participate in the photosphere management.Therefore, need not to require interconnection and interflow between theequipment 302 and the network equipment 201.Optical communication system 300 can provide photosphere OAM by low-cost high-efficiency beneficially, and need not boundary equipment or with the ability that interconnects fully of the network equipment at customer rs premise place.

In certain embodiments, the machinery of pluggable optical transceiver 320, light andelectrical interface 322 standard compliant MSA standard, for example GBIC, SFP, XFP, X2, XENPAK and SFP+ or the like.It makes can realize light regime under the situation that does not change equipment 302.In certain embodiments, pluggable optical transceiver 320 can be the device with self power supply.Pluggable optical transceiver 320 can receive the power from thenetwork equipment 302 at its standard pinelectrical interface 322 places.

Fig. 4 illustrates the intelligentoptical transceiver 400 with non-interfering type management channels ability, and it is compatible mutually with the intelligent optical transceiver 210,220 and 320 in optical communication system 200 and 300.Driver 403 as laser driver, receives differential data signals TD+ and the TD-be loaded with user data, launches at emissionelectrical interface 421 places being used for.Under the driving of driver 403, emission optical assembly (TOSA) 401 can be at emissionoptical interface 422 places emission optical output signal.The receiving optical signals that receivesoptical interface 432 places can be received optical assembly (ROSA) 402 and convert to and receive the signal of telecommunication and is further amplified bypost amplifier 404, thereby exports differential data signals RD+ and RD-receivingelectrical interface 431 places.Micro controller unit (MCU) 410 can monitor and control the operation of optical transceiver 400.MCU 410 can and receive control signal atinterface 411 place's output states and othersignals.Processing unit 412 is integrated in theoptical transceiver 400 so that carry out non-interfering type photosphere supervisory communications with other far-end optical transceivers, as top in conjunction with Fig. 2 and Fig. 3 described.In certain embodiments,processing unit 412 can be embodied as the modulator-demodulator that is integrated in the optical transceiver 400.In certain embodiments,processing unit 412 andMCU 410 can be embodied as the modulator-demodulator that is integrated in the optical transceiver 400.Processing unit 412 can also be embodied as circuit, perhaps all or part ofly realize, for example firmware by the software that is stored in the computerstorage.Processing unit 412 is connected very closely withMCU 410, so that management data is sent toMCU 410 apace, and to be used for dataprocessing.Processing unit 412 communicates with driver 403.Should be understood that the received signal that transmit and the post amplifier that driver received exported is not limited to differential signal.These two kinds of signals can also meet the single-ended signal standard.

In transmission path,processing unit 412 can send themodulator control signal 418 that includes management information to driver 403.Usually, compare with the emission user data that receives in emissionelectrical interface 421 places,modulator control signal 418 is low speed signal preferably, tens of kilobits of per second for example, and the former can be greater than per second 1 gigabit.In certain embodiments, bias voltage or the electric current ofmodulator control signal 418 in can modulating driver 403 generates low speed, by a small margin envelope modulation to go up in differential data signals (TD+ and TD-).In RX path, ROSA 402 can sendsignal 416 toprocessing unit 412 in response to receiving optical signals.Low speed in the receivingoptical signals 416, by a small margin the modulation can the bearer management data.Usually, compare with the receiving subscriber data output signal of telecommunication fromROSA 402,signal 416 is for example tens of kilobits of per second of low speed signal, and the former can be greater than persecond 1 gigabit.For example,signal 416 can be the mirror image photo-signal that produces at ROSA 402places.Processing unit 412 can restitutedsignal 416 and extract management data.Therefore, intelligentoptical transceiver 400 has the ability that sends and receive the non-interfering type management data.The management data that is extracted can be handled by MCU 410, perhaps is sent to the main process equipment ofoptical transceiver 400 by interface 411.For example, theoptical transceiver 210 that can useoptical transceiver 400 to replace in the optical communication system 200 or 300.Optical transceiver 400 can be located at the OLT that is positioned at the service provider place (optical line terminal).Management data can be sent out away byinterface 216, and is handled by administration module 212.In another example,optical transceiver 400 can be positioned at the remote location away from the service provider place.Optical transceiver 400 can be the insertable transceiver that is connected to third party device as shown in Figure 3.MCU 410 can serve as the center cell of handling and generating management data.

Should be understood that disclosed optical transceiver can comprise the parts the above-mentioned parts in optical transceiver 400.For example, disclosed optical transceiver can comprise the functional module such as CDR (clock and data recovery), SerDes (serializer, deserializer) and other functional modules.In addition, driver 403 can be laser-driven chip or the external modulator that can modulate from the continuous wave light signal of TOSA 401.

Should be understood that functional block in theoptical transceiver 400 and parts can be discrete physical devices.Several functional blocks can be integrated into single device.For example, emissionoptical assembly 401 and receptionoptical assembly 402 can be integrated in the bi-directional light assembly (BOSA), and wherein said bi-directional light assembly has the bi-directional light interface that can exportemission light signal 422 and receive receivingoptical signals 432.

The data loopback test is the useful means that are used to debug with the fixer network failure mode to the service provider.It can helping service provider be avoided unnecessary " fault is patrolled and examined " and reduce operating cost.Fig. 5 illustrate withoptical communication system 200 and 300 in the compatible mutually intelligent optical transceiver 500 of optical transceiver 210,220 and 320.Intelligence optical transceiver 500 comprises the non-interfering type management channel, and it is similar to top combined with intelligentoptical transceiver 400 described non-interfering type management channels.Intelligence optical transceiver 500 comprises integrated loopback controller 570, and integrated loopback controller 570 can receive differential data signals (TD+, TD-), launches at emissionelectrical interface 421 places being used for.Loopback controller 570 can be operated under the bypass situation of acquiescence, and under the bypass situation, the differential data signals that is used to launch (TD+, TD-) directly is sent to driver 403, receives data (RD+, RD-) and is also directly launched frompost amplifier 404.

MCU 410 can be atinterface 411 places to outside output status signal and the control signal (not shown in Fig. 5) that receives from theoutside.MCU 410 can transmit control signal 590, so that loopback controller 570 is controlled to be different loopback modes, comprises local loopback and remote loopback.Under the local loopback pattern, the differential data that is used to launch (TD+, TD-) is routed in loopback controller 570 inside to get back to and receives electrical interface (along the path 580).The normal operation of the network equipment that the signal that institute's route is returned can be used to verify that intelligent optical transceiver 500 is inserted.Under the remote loopback pattern, the output ofpost amplifier 404 is got back to driver 403 (along the path 585) by loopback controller 570.Driver 403 and TOSA 401 can generate the emission light signal that the receiving optical signals that receives the reception ofoptical interface 432 places is duplicated.The light signal that is duplicated under the remote loopback pattern can make the service provider remotely verify to come and go the operating state of optical transceiver 500 and optical transceiver 500 itself.

In certain embodiments, above-mentioned intelligent optical transceiver, system and method can be able to further enhancing by ring of light resilience power.With reference to the intelligent optical transceiver 600 among the figure 6A, reflector 601 is configured to receive the emission signal of telecommunication and emission light signal at emission electrical interface 621 places.Optical branch device 604 can output to the emission light signal emission optical interface 622.Optical branch device 603 is configured to receiving optical interface 632 places reception receiving optical signals.Receiver 602 will change the reception signal of telecommunication into from the receiving optical signals that optical branch device 603 receives at reception electrical interface 631 places.Optical branch device 603 and 604 suitable execution mode comprise optical splitter, optical switch, variable optical attenuator and other optical branch devices.Loop-back path 610 is configured to from optical branch device 603 to optical branch device 604.Under normal operating condition, loop-back path 610 be the open circuit or the decay very big.Compare with the emission light signal that reflector 601 is launched, the intensity that the ring of light is write in reply number is little of ignoring.Under diagnostic mode, at least a portion receiving optical signals returns by ring of light loop footpath 610: from optical branch device 603 to optical branch device 604, arrive emission optical interface 622 then.Reflector 601 can be stopped by optical branch device 604 by forbidden energy or the output of its light.The receiving optical signals that returns can be received by the optical device that is in diverse location, to be used for the integrality of the optical link that remote testing is connected with intelligent optical transceiver 600.

Optical branch device 603 and 604 can be realized by Passive Optical Components.When the data loopback is unavailable (during power-fail), the ring of light returns the remote testing that allows optical link.Optical branch device 603 can be mutually integrated with reflector 601 in the optical transceiver 600 and receiver 602 with 604 and be formed whole optical assembly (OSA).Whole OSA can meet different optical transceiver canonical form or specification, includes but not limited to: GBIC, SFP, XFP, X2, XENPAK and SFP+.Emission electrical interface 621 and receive electrical interface 631 thereby can insert in the mainframe network equipment based on these standard interfaces.Emission optical interface 622 is configured to be connected with optical fiber with reception optical interface 632, with the optical communication of permission with remote station.

Optical branch device 603 and 604 can be realized by optical splitter (being directional optical coupler).Shown in Fig. 6 B, optical splitter 650 comprises three ports:public port 651, optical branch port A652 and optical branch port B 653.The light signal that receives atpublic port 651 places can be conducted to branch port A 652 and branch port B 653 with specific splitting ratio.Otherwise, can be with corresponding combination than combining, to export atpublic port 651 places at the light signal ofbranch port A 652 and the reception of branch port B 653 places.Splitting ratio and combination are than changing along with the structure of optical splitter 650.Optical crosstalk between branch port A 652 and the branch port B 653 can be minimized, so that branch port A 652 and branch port B 653 can be considered to isolate.Optical splitter 650 can be used as the device that does not use power supply and is implemented.During optical branch device 603 in being applied to intelligent optical transceiver 600,public port 651 receives from the receiving optical signals that receives optical interface 632.Branch port A 652 and branch port B 653 are connected to receiver 602 and optical branch device 604 respectively.When being applied to optical branch device 604,public port 651 is connected to emission optical interface 622.Branch port A 652 and branch port B 653 are connected to reflector 601 respectively to receive emission light signal and optical branch device 603 to receive receiving optical signals.For optical branch device 603 and 604, splitting ratio between branch port A 652 and the branch port B 653 is designed to provide the enough strong ring of light to write in reply number to be used for remote diagnosis and detects, and makes simultaneously to be incorporated into the emission light signal under the normal operating condition and the noise minimum of receiving optical signals.

Fig. 6 C illustrates another embodiment of optical branch device 603 and 604.Optical switch 660 comprisespublic port 661, branch port A 662 and branch port B 663.Under the control ofcontrol signal 665,public port 661 can be switched to branch port A 662 or branch port B 663.An illustrative embodiments ofoptical switch 660 is 1 * 2 optical switches.The execution mode ofoptical switch 660 is similar to the relevant description of above and optical splitter 650 in optical branch device 603 and 604.In addition,optical switch 660 can be to receive external power source and the active device of working.In case power-fail, describedoptical switch 660 can automatically restore to default conditions, so that set up ring of light loop footpath for remote testing.

It is one of modal fault in the optical-fiber network that device power supply (DPS) lost efficacy.Power-fail often occurs in the equipment that is arranged in remote station." alarm for power-off " refers to a kind of from the ability of remote station by optical-fiber network report power failure." alarm for power-off " can for example be undertaken by the Ethernet OAM in the optical-fiber network (operation management maintenance).Traditional " alarm for power-off ", such as " alarm for power-off " that in ieee specification, define, the interoperability between the test side that the equipment of requirement inefficacy end and light connect.In fact, this interoperability usually by realizing at the extra boundary equipment of remote station configuration, so just needs extra equipment cost and cost of labor.

In certain embodiments, as shown in Figure 7, " alarm for power-off " function can be implemented at the photosphere between the intelligentoptical transceiver 701 and 702 that is connected by optical link 703.Intelligenceoptical transceiver 701 is positioned at service provider's guard station.Intelligenceoptical transceiver 702 is positioned at remote station (such as customer rs premise).Optical transceiver 701 comprisesreceiver 710,post amplifier 711 and alarm for power-off detector 713.Optical transceiver 702 comprisesreflector 720, driver 721 and power-fail monitor 723.

When being about to power-fail takes place at far-endoptical transceiver 702 places, power-fail monitor 723 can detect this problem.Drop at power supply before the threshold level of the normal operation that is lower thanoptical transceiver 702, power-fail monitor 723 sends signal to driver 721, and this signal drivesreflector 720 and sends predefined alarm for power-off signal 705 by opticallink 703.Receiver 710 in theoptical transceiver 701 obtains predefined alarm for power-off signal 705 and exports the mirror image photoelectric current 715 that comprises alarm for power-off signal 705.Predefined alarm for power-off signal 705 can be realized by light envelope modulation, light output on/off switch and other modulation schemes.Intelligenceoptical transceiver 701 may further include and is configured to the demodulation signal of telecommunication to extract alarm for power-off Signal Processing unit." alarm for power-off " incident that alarm for power-off detector 713 detects in the mirror image photoelectric current 715.Alternatively,post amplifier 711 receives the signal of telecommunication and sends dropout (LOS) 716 to alarm for power-off detector 713 fromreceiver 710, and wherein " alarm for power-off " incident is detected.Alarm for power-off detector 713 can be realized by circuit or the software (as firmware) that is stored in the computer storage.The detection of above-mentioned " alarm for power-off " can be implemented in photosphere, and described photosphere is independent of the form of customer data inlayer 2 and emission and the RX path.

Fig. 8 illustrates the exemplary detailed diagram of intelligent optical transceiver 800.Optical transceiver 800 can be implemented as the insertable transceiver, and it has the following widely accepted form of multi-source agreement (MSA) in the optical-fiber network industry.For example,optical transceiver 800 can meet GBIC, SFP, XFP, X2, XENPAK and SFP+.

Optical transceiver 800 can comprise and is configured to provide as before the optical transceiver 600 described rings of light being returned theoptical branch device 830 and 831 of function.The overwhelming majority of input optical signal is coupled toROSA 801 by optical branch device 830.The overwhelming majority of the power output ofoptical branch device 831 is from TOSA 811.When realizing with optical splitter, optical branch device have different splitting ratios and in conjunction with than.For example,optical branch device 830 and 831 can have respectively 10% splitting ratio and in conjunction with than, be fed back thereby cause 1% of input optical power to return by the ring oflight.MCU 820 can handle and control telecommunication management, and transmits communications status and control signal (TxDisable, TxFault, LOS etc.) at the I2C interface to the outside.

On the Data Receiving path, the input optical signal byoptical branch device 830 is converted to differential electric signal by ROSA801.Further belimited amplifier 803 of this differential electric signal amplifies and is sent to fan outbuffer 823 then, and fan outbuffer 823 can dateout RD+/-.Fan outbuffer 823 is also to data loop-back path dateout.

On the data transmission path, the differential data signals TD+ of input/-received by 2 * 1MUX 824.2 * 1MUX 824 under from the control of the SEL signal ofMCU 820 with TD+/-signal or send todriver 812 from the looping back data of fan out buffer 823.Therefore,driver 812 drives the emission light signal thatTOSA 811 emissions can comprise user data or looping backdata.Driver 812 is enabled by the enable signal from MCU 820.The output ofoptical branch device 831 comprises from the signal ofTOSA 811 and the combination of writing in reply number from the ring of light ofoptical branch device 830.

Management data is transmitted indifferent paths.ROSA 801 outputs comprise mirror image photoelectric current received, that be carried on the management data in the receiving optical signals.AFE (AFE (analog front end)) 802 is converted to this mirror image photoelectric current the voltage signal of amplification to be input to modulator-demodulator 821, and wherein said modulator-demodulator 821 is embedded among the MCU 820.Under the broad power band that is operated in receiving optical signals,AFE 802 can adjust multiplication factor automatically under the control of modulator-demodulator 821.Modulator-demodulator 821 can be implemented by firmware or software, to utilize the hardware resource of MCU820.Modulator-demodulator 821 can datumization receives signal, come the extract management data and apply envelope modulation to the output light signal based on predefined algorithm.In one embodiment, pass todriver 812 producing the variation of bias current through the offset signal of ovennodulation fromMCU 820, this variation can produce modulation to the amplitude of the output light signal byoptical branch device 831 then.

Still with reference to Fig. 8, as long as power Vcc drops to below the predetermined threshold value, power-fail monitor 822 just can generate event signal in real time.Under the triggering of this event signal, MCU820 sends " alarm for power-off " with predefined command mode immediately.Can by the modulation bias current or by enable control signal EN simply Q-swith laser Q send " alarm for power-off ".Before power supply was reduced tooptical transceiver 800 inoperable points, " alarm for power-off " must in time be sent.For example, if Vcc approximately is 3.3 volts, can be with the power monitoring threshold setting at 3.0 volts.The minimum ofoptical transceiver 800 is 2.5 volts.The process that " alarm for power-off " signals should be after Vcc be reduced to below 3.0 volts but was finished before it reaches 2.5 volts.

Generally speaking, above-described " alarm for power-off " monitors, reports and detect and be implemented in photosphere, and it is compared directly simple more and has response faster with some traditional " alarm for power-off " systems.

In certain embodiments, disclosed system and method about photosphere management and intelligent optical transceiver (among Fig. 1 to Fig. 8) can be embodied in the multichannel light network more than.With reference to Fig. 9,optical network system 900 comprise in the optical line terminal (OLT) 901wavelength filter 911 and at the wavelength filter 912 at distant-end node 903 places.The example ofwavelength filter 911 and wavelength filter 912 comprises wavelength division multiplexing (WDM) filter (it can be realized by for example array waveguide grating AWG), film DWDM (dense wave division multipurpose) filter and film CWDM (Coarse Wavelength Division Multiplexing) filter.

Wavelength filter 911 and 912 all comprises one or more public ports.Wavelength filter 911 and 912 public port are coupled together by optical link 902, and wherein said optical link 902 can be formed by simple optical fiber or the optical cable that comprises a branch of optical fiber.Wavelength filter 911 and 912 also comprises the branch port of a plurality of symmetries, the port of above-mentioned symmetry respectively different wavelength channel " Ch1 ", " Ch2 " ..., communicate in " ChN ".The branch port of the wavelength filter 911 at OLT 901 places be connected to a plurality of intelligent optical transceiver 910_1,910_2 ..., 910_N.Intelligence optical transceiver 910_1,910_2 ..., 910_N comprise respectively modulator-demodulator 911_1,911_2 ..., 911_N, wherein said modulator-demodulator 911_1,911_2 ..., in 911_N can be integrated in it is associated the optical transceiver.Intelligence optical transceiver 910_1,910_2 ..., 910_N can be inserted into the network equipment that is arranged in OLT 901 places.OLT901 also comprise with intelligent optical transceiver 910_1,910_2 ..., the network management unit 914 that communicates of 910_N.Similarly, the branch port of the wavelength filter 912 at distant-end node place be connected to lay respectively at different optical network unit (ONU) 904_1,904_2 ..., a plurality of intelligent optical transceiver 920_1, the 920_2 at 904_N place ..., 920_N.ONU 904_1,904_2 ..., 904N typically is distributed on the different location.Intelligence optical transceiver 920_1,920_2 ..., 920_N can be inserted into be positioned at different ONU 904_1,904_2 ..., in the network equipment of 904_N.Intelligence optical transceiver 920_1,920_2 ..., 920_N comprise respectively modulator-demodulator 921_1,921_2 ..., 921_N, wherein said modulator-demodulator 921_1,921_2 ..., in 921_N can be integrated in it is associated the optical transceiver.

Optical network system 900 (for example OLT with a plurality of ONU between) can be provided between single-point and the multiple spot with communicating by letter in the different communication passage.Communication port can be special-purpose between 2 o'clock and be independent of other passages.For example, communicating by letter between the intelligent optical transceiver 920_1 among the intelligent optical transceiver 910_1 among theOLT 901 in the passage 1 (i.e. " Ch1 ") and the ONU 904_1 is that branch port by the special use inwavelength filter 911 and 912 is carried out.

Similar with above description, in optical network system 900, can set up the non-interfering type management channels at photosphere.This non-interfering type management channels can be based upon intelligent optical transceiver 910_1,910_2 ..., 910_N and 920_1,920_2 ..., the corresponding intelligent optical transceiver among the 920_N between each wavelength channel on.For example, the dotted line of locating as wavelength channel " Ch1 " indicates, the non-interfering type management channels on wavelength channel Ch1 can be based upon between the modulator-demodulator 911_1 and the modulator-demodulator 921_1 among the optical transceiver 920_1 among the optical transceiver 910_1.Be similar to communicating by letter between administration module 212 and the modulator-demodulator 211 in optical communication system 200 and 300, network management unit 914 by intelligent optical transceiver 910_1 all among communication interface and the OLT 901 ..., 910_N communicates.Intelligent optical transceiver 910_1 among network management unit 914 and the OLT901 ..., the example communication interface between the 910_N is the I2C serial communication bus.By the non-interfering type management channels, network management unit 914 can also visit far-end ONU 904_1 ..., the intelligent optical transceiver 920_1 at 904_N place ..., 920_N.For example, network management unit 914 can send to smart transceiver 910_1 to the down management data.Modulator-demodulator 911_1 among the transceiver 910_1 can send to modulator-demodulator 921_1 among the smart transceiver 920_1 to the down management data.Similarly, can send to network management unit 914 to up management data from modulator-demodulator 921_1 by modulator-demodulator 911_1.Therefore comprise the OLT 901 at place, central office and remote location place ONU904_1 ..., the optical network system 900 of 904_N can be by network management unit 914 management at OLT 901 places under the situation of not knowing format of user data or transmission content.

It should be noted thatoptical network system 900 is only for example understood the optical network system of a point to multiple spot.Current invention also meets the optical network system of point-to-point.In the optical network system of this point-to-point, wavelength filter 912 and intelligent optical transceiver 920_1 ..., 920_N can colocated and be integrated in the system that is similar to OLT 901.The WDM transmission system that an example of this system is a point-to-point.

Should be understood that above-mentioned concrete configuration and parameter mean the explanation to notion of the present invention.Disclosed system and method can comprise the change that described configuration and parameter are carried out, and does not depart from spirit of the present invention.For example, should be understood that, only is a kind of illustrative embodiments to the envelope modulation by a small margin of user data signal.Disclosed system and method can adopt other modulation and demodulation technology, such as but not limited to: frequency modulation(FM) and phase modulated.Disclosed optical transceiver, optical communication network and optical communication system can comprise other part or have and above-mentioned different structure.Disclosed optical transceiver can meet other unlisted in above description standards.Disclosed system and method can be fit to active and passive device, and point-to-point or point-to-multi-point optical network.

Claims (22)

1. an integrated optical transceiver is characterized in that, comprising:

Optical receiver is configured to generate first signal of telecommunication in response to first light signal at reception electrical interface place;

Optical transmitting set is configured to launch second light signal in response to second signal of telecommunication that receives at emission electrical interface place;

First optical branch device is configured to receive first light signal and at least a portion of first light signal is directed at optical receiver receiving the optical interface place; And

Second optical branch device, be configured to second light signal is directed at the emission optical interface, wherein first optical branch device is configured at least a portion of first light signal is directed at second optical branch device, and wherein second optical branch device is configured to and will be directed at the emission optical interface from this part first light signal of first optical branch device reception.

2. integrated optical transceiver according to claim 1 is characterized in that, described first optical branch device and second optical branch device comprise optical splitter, optical switch or adjustable optical attenuator.

3. integrated optical transceiver according to claim 1 is characterized in that, described reception electrical interface and emission electrical interface meet the standard that is selected from the standard group that comprises SFF, SFP, XFP and SFP+.

4. integrated optical transceiver according to claim 3 is characterized in that, described reception electrical interface and emission electrical interface are configured to be inserted in the mainframe network equipment.

5. integrated optical transceiver according to claim 1, it is characterized in that, also comprise the power-fail monitor, described power-fail monitor be configured to detect in the integrated optical transceiver close on power-fail and when detect the time generation alarm for power-off signal that closes on power-fail in integrated optical transceiver, wherein said optical transmitting set is configured to export second light signal in response to the alarm for power-off signal at least in part.

6. integrated optical transceiver according to claim 5 is characterized in that, described alarm for power-off signal carries by envelope modulation in second light signal or on/off switch.

7. an optical communication system is characterized in that, comprising:

First optical transceiver module comprises:

The power-fail monitor, be configured to detect in first optical transceiver module close on power-fail and when in first optical transceiver module, detecting the time generation alarm for power-off signal that closes on power-fail;

With first reflector that the power-fail monitor communicates, described first reflector is configured to comprise in the place's output of emission optical interface first light signal of alarm for power-off signal; And

Second optical transceiver module comprises:

Second receiver is configured to export second signal of telecommunication by the optical link reception from first light signal that comprises the alarm for power-off signal of first optical transceiver and in response to first light signal; And

The alarm for power-off detector is configured to detect the alarm for power-off signal in first light signal or second signal of telecommunication.

8. optical communication system according to claim 7 is characterized in that, described first optical transceiver module further comprises driver, and described driver is configured to drive first reflector in response to the alarm for power-off signal that receives from the power-fail monitor.

9. optical communication system according to claim 7 is characterized in that, described second optical transceiver module further comprises amplifier, and described amplifier is configured to amplify from the signal of telecommunication of receiver and to the alarm for power-off detector and sends the dropout signal.

10. optical communication system according to claim 7 is characterized in that, described alarm for power-off signal carries by envelope modulation in first light signal or on/off switch.

11. optical communication system according to claim 10 is characterized in that, described second optical transceiver module further comprises processing unit, and described processing unit is configured to demodulation second signal of telecommunication to extract the alarm for power-off signal.

12. optical communication system according to claim 7 is characterized in that, wherein said second optical transceiver module further comprises second optical transmitting set that is configured to launch second light signal, and wherein said first optical transceiver module further comprises:

First optical receiver is configured to generate second signal of telecommunication in response to second light signal;

First optical branch device is configured at least a portion of second light signal is directed at first optical receiver; And

Second optical branch device, be configured to first light signal is directed at the emission optical interface, wherein first optical branch device is configured at least a portion of second light signal is directed at second optical branch device, and wherein second optical branch device is configured to and will be directed at the emission optical interface from this part second light signal of first optical branch device reception.

13. an optical network system is characterized in that, comprising:

A plurality of first optical transceiver modules, each first optical transceiver module comprises:

First reflector is configured to export downlink optical signal in response to descending modulator control signal with comprising the first downlink electrical signal of down user data;

First receiver, be configured to receive uplink optical signal, wherein said uplink optical signal comprises uplink user data and is loaded with the up modulation signal of up management information that wherein first receiver is configured to export first signal of telecommunication that comprises up modulation signal and first uplink electrical signals that comprises uplink user data; And

First processing unit is configured to generate descending modulator control signal and be configured to demodulation first signal of telecommunication to extract up management information in response to down management information;

First wavelength filter comprises:

A plurality of first branch port, each first branch port is associated with one first optical transceiver module, and the downlink optical signal and first receiver in its first associated optical transceiver module that are configured to receive from first reflector in its first associated optical transceiver module send uplink optical signal, and wherein said each first branch port all is associated with wavelength channel; And

First public port is configured to export the downlink optical signal that receives at arbitrary first branch port place;

A plurality of second optical transceiver modules, each second optical transceiver module comprises:

Second receiver is configured to receive downlink optical signal and exports second signal of telecommunication, and wherein said second signal of telecommunication comprises descending modulator control signal and comprises the second downlink electrical signal of down user data;

Second processing unit is configured to demodulation second signal of telecommunication with extraction down management information, and generates up modulator control signal in response to up management information; And

Second reflector is configured to launch uplink optical signal in response to up modulator control signal with comprising second uplink electrical signals of uplink user data; And

Second wavelength filter comprises:

A plurality of second branch port, each second branch port are configured to receive from the uplink optical signal of one second optical transceiver module and to this second optical transceiver module and send downlink optical signal; And

Second public port is configured to first public port output uplink optical signal and receives downlink optical signal from first public port.

14. optical network system according to claim 13, it is characterized in that, further comprise network management unit, described network management unit is configured to receive up management information and generate at least a portion of down management information in response to up management information from first processing unit.

15. optical network system according to claim 13 is characterized in that, described first optical transceiver module can be inserted in first main process equipment and be configured to and receive down user data from first main process equipment.

16. optical network system according to claim 13 is characterized in that, described second optical transceiver module can be inserted in second main process equipment and be configured to and receive uplink user data from second main process equipment.

17. optical network system according to claim 13, it is characterized in that, described second optical transceiver module further comprises the power-fail monitor, described power-fail monitor is configured to detect closing on power-fail and such producing the alarm for power-off signal when closing on power-fail detecting in second optical transceiver module, and wherein said second processing unit is configured to generate up modulator control signal in response to the alarm for power-off signal.

18. optical network system according to claim 17, it is characterized in that, described alarm for power-off signal carries by the on/off switch of envelope modulation in the uplink optical signal or light, and wherein said first processing unit is configured to extract the alarm for power-off signal from uplink optical signal.

19. optical network system according to claim 13, it is characterized in that, in described second optical transceiver module at least one further comprises the loopback controller, to send the second downlink electrical signal to receiving the electrical interface or second reflector under the control of first control signal, wherein said second reflector is configured to launch uplink optical signal in response to the second downlink electrical signal that is sent by the loopback controller.

20. optical network system according to claim 19, it is characterized in that, described loopback controller is configured to receive second uplink electrical signals at emission electrical interface place, and at least a portion that is configured to second uplink electrical signals of the electrical interface of spontaneous emission in the future under the control of second control signal is routed to the reception electrical interface.

21. an optical communication method that utilizes optical transceiver is characterized in that, comprising:

Generate first signal of telecommunication by optical receiver at reception electrical interface place in response to first light signal;

Launch second light signal in response to second signal of telecommunication that receives at emission electrical interface place by optical transmitting set;

Receive first light signal by first optical branch device at reception optical interface place;

By first optical branch device at least a portion of first light signal is directed at optical receiver;

By second optical branch device second light signal is directed at the emission optical interface;

By first optical branch device at least a portion of first light signal is directed at second optical branch device; And

To be directed at the emission optical interface from this part first light signal that first optical branch device receives by second optical branch device.

22. an optical communication method is characterized in that, comprising:

Detect the power-fail that closes in first optical transceiver module by the power-fail monitor;

Produce the alarm for power-off signal when in first optical transceiver module, detecting when closing on power-fail by the power-fail monitor;

First light signal that comprises the alarm for power-off signal in the place's output of emission optical interface;

By first light signal that comprise alarm for power-off signal of the reception of second receiver in second optical transceiver module from first optical transceiver;

Export second signal of telecommunication in response to first light signal; And

Detect alarm for power-off signal in first light signal or second signal of telecommunication by the alarm for power-off detector.

Images