For the self focusing light fibre array and its manufacture method of the coupling of VSCEL or PIN arraysTechnical field
The present invention relates to technical field of photo communication, more particularly to a kind of self focusing light for the coupling of VSCEL or PIN arraysFibre array and its manufacture method.
Background technology
With the development of economy era, the communications field in the life of people in occupation of increasingly consequence, andPeople have been no longer satisfied with the communications that transmission rate is low, transmittability is weak, and start to update Optical Fiber Transmission thisTransmission means, in the middle of this continuous improvement, the optical fiber technology of the communications field is more and more ripe.
The emergent light of VCSEL and PIN is perpendicular to the circuit board surface installed, and this is all little for the encapsulation and application of deviceIt is convenient.Simplest optical interface is that optical fiber is docked with VCSEL and PIN, and the emergent light of laser is directly entered optical fiber, withoutOther intermediary elements, such coupled modes are referred to as vertical coupled.The vertical coupled reflection due to light causes speed too high,Further, since being vertical coupled, optical fiber, into perpendicular shape, causes the volume of optical module to increase with PCB.Coupling side typically nowFormula is that fiber array is ground into 90 ° of corners that reflecting surface at 45 ° realizes optical signal, it is ensured that the efficiency of coupling package and product it is wholeBody structure is smaller, although 45 ° of reflectings surface can realize the total reflection of optical signal, but fiber array is believed with the light of VCSEL and PINNumber coupling efficiency is not very high；Also have in the prior art and a piece of lens be respectively set in the light path both sides of 45 ° of reflectings surface, VCSEL andThe emergent light of PIN by being irradiated to 45 ° of reflectings surface after a face lens light gathering, by 45 ° of light of reflective surface again by oneEnter in optical fiber after the lens light gathering of face, such setting can greatly improve the coupling efficiency of optical signal, but such settingCost is too high, is unfavorable for producing in large quantity and uses.
The content of the invention
For weak point present in above-mentioned technology, a kind of low cost of present invention design, optical signal coupling efficiency are high, energyThe self focusing light fibre array and its manufacture method for the coupling of VSCEL or PIN arrays for enough solving the above problems.
To achieve the above object, provided by the present invention for the self focusing light fibre array of VSCEL or PIN arrays coupling, bagSubstrate, cover plate and plurality of optical fibers are included, the substrate includes substrate leading portion and base plate rear section, and the substrate leading portion upper surface is higher thanThe base plate rear section upper surface, the substrate leading portion upper surface is provided with and is all provided with the one-to-one V-shaped groove of optical fiber, every optical fiberPut in corresponding V-shaped groove, and condensing body is connected on every optical fiber its end face, the condensing body is located at substrate leading portion forwardExtension, the cover plate is arranged on substrate leading portion, and cover plate encloses the accommodation space of fixed optical fiber with each V-shaped groove；The outwardly end of the condensing body has an optical flat, and the optical flat is 30-60 ° with the angle of optical fiber bottom surface；OutwardPortion's optical signal is focused on by the bottom of condensing body and enters condensing body, and is entered in the optical fiber by after optical flat reflectionPortion.
Wherein, the tail glue for fixing and protecting optical fiber is coated with the optical fiber between the cover plate and base plate rear section, andHeight of the height of the tail glue less than or equal to cover plate.
Wherein, the length of the condensing body is more than 0.15mm.
Wherein, the intersection of the substrate leading portion and base plate rear section is provided with excessive inclined-plane.
Wherein, upper level of the bottom surface of each V-shaped groove with base plate rear section is consistent.
To achieve these goals, present invention also offers a kind of self-focusing optical fiber for the coupling of VSCEL or PIN arraysThe manufacture method of array, the manufacture method is comprised the following steps：
Step 1, substrate processing：A slope is processed on substrate, substrate is divided into substrate leading portion and base plate rear section by slope, thenMultiple V-shaped grooves being adapted with optical fiber shape size are opened up in the upper surface of substrate leading portion；
Step 2, condensing body welding：In one section of condensing body of the equal welding in one end of every optical fiber, every section of length and size of condensing bodyIt is consistent；
Step 3, optical fiber assembling：The optical fiber that every welding has condensing body is placed in V-shaped groove corresponding on substrate, and will be moltenThe one end for being connected to condensing body forward extends out from substrate leading portion, and keeps the length that every optical fiber stretches out consistent, finally consolidates cover plateIt is scheduled on the upper surface of substrate leading portion to fix optical fiber, constitutes fiber array；
Step 4, condensing body grinding：The condensing body on optical fiber assembled to every is ground, and is ground on every condensing bodyGrinding can be with the optical flat of reflected light signal, and optical flat and the angle that substrate bottom surface is in 30 ° to 60 °.
Wherein, upper level of the bottom surface of each V-shaped groove with base plate rear section is consistent in step 1.
Wherein, a diameter of 0.15-0.25mm of the sphere for coming is fused in step 2.
Wherein, step 3 is also coated including tail glue：It is coated with for fixing on every optical fiber between cover plate and base plate rear sectionWith the height that the height of the tail glue of protection optical fiber, and the tail glue is less than or equal to cover plate.
Advantage of the invention is that：
1st, the fiber array that the present invention is provided, has condensing body, then energy is ground on condensing body in one end welding of every optical fiberEnough optical flats that total reflection is realized to optical signal；Condensing body has self-focusing effect in itself, will can be irradiated into thereinOptical fiber is assembled, then the cooperation with optical flat, can simultaneously realize the advantage of lens light gathering and optical flat reflected light, phaseThan being substantially reduced in existing utilization separate lenses and optical flat work in combination its cost, it is also added significantly to optical fiber in additionThe tolerance of array, its adjustable extent is bigger when coupling adjustment is carried out to optical fiber, so as to reduce difficulty and the increasing of couplingThe efficiency of coupling is added；
2nd, one end of every light of the invention processes condensing body, and wherein condensing body optical flat is with the angle of substrate bottom surface30 ° to 60 ° can realize well optical signal be irradiated on optical flat after total reflection, make optical flat in no plated filmIn the case of, can well realize the total reflection of optical signal by the reflection of angle.
3rd, the condensing body and optical fiber in the present invention are integral type structure, and its optically focused angle etc. need not be adjusted additionally, canIt is high by property, it is mounted directly optical fiber and processes the i.e. achievable high-precision light path coupling of condensing body, improve coupling efficiency.
Brief description of the drawings
Fig. 1 is top view of the present invention for the self focusing light fibre array of VSCEL or PIN arrays coupling；
Fig. 2 is front view of the present invention for the self focusing light fibre array of VSCEL or PIN arrays coupling；
Fig. 3 is the partial enlarged drawing at A in Fig. 2；
Fig. 4 is flow chart of the present invention for the manufacture method of the self focusing light fibre array of VSCEL or PIN arrays coupling.
Main element symbol description is as follows：
1st, substrate 2, cover plate
3rd, optical fiber 4, tail glue
11st, substrate leading portion 12, base plate rear section
13rd, excessive inclined-plane 31, condensing body
311st, optical flat.
Specific embodiment
In order to more clearly state the present invention, the present invention is further described below in conjunction with the accompanying drawings.
Fig. 1-3 are referred to, provided by the present invention for the self focusing light fibre array and its system of the coupling of VSCEL or PIN arraysMethod, including substrate 1, cover plate 2 and plurality of optical fibers 3 are made, substrate 1 includes substrate leading portion 11 and base plate rear section 12, substrate leading portion11 upper surfaces be higher than the upper surface of base plate rear section 12, the upper surface of substrate leading portion 11 be provided with the one-to-one V-shaped groove of optical fiber 3, oftenRoot optical fiber 3 is arranged in corresponding V-shaped groove, and is connected to condensing body 31 on every optical fiber 3 its end face, and condensing body 31 is located atThe front extension of substrate leading portion 11, cover plate 2 is arranged on substrate leading portion 11, and cover plate 2 encloses fixed light with each V-shaped grooveFine 3 accommodation space；The outwardly end of condensing body 31 has an optical flat 311, optical flat 311 and the bottom surface of optical fiber 3Angle is 30-60 °；External optical signal is focused on by the bottom of condensing body 31 and enters condensing body 31, and anti-by optical flat 311Enter inside optical fiber 3 after penetrating.
In the present embodiment, it is coated with for fixing and protecting optical fiber 3 on the optical fiber 3 between cover plate 2 and base plate rear section 12Tail glue 4, and tail glue 4 height less than or equal to cover plate 2 height.The setting of tail glue 4 can play a fixation to optical fiber 3Effect, when optical fiber 3 is subsequently ground and used, can combine guarantee optical fiber 3 position constant together with cover plate 2；TailThe height of glue 4 is the stability for ensureing tail glue 4 less than or equal to the height of cover plate 2, if the height of tail glue 4 is higher than cover plate 2Height, easily because scratching in using and processing causes tail glue 4 to come off, so as to greatly shorten the service life of tail glue 4.In the present invention, it is not limited to aid in fixing optical fiber 3 using tail glue 4 herein, other fixed structures can also be used, as long as energyEnough realize the good fixed of optical fiber 3.
In the present embodiment, the length of condensing body 31 is more than 0.15mm.In the present invention, condensing body 31 is and carries autohemagglutinationThe special fiber 3 of burnt effect, and its one end processes optical flat 311, its length is conducive to processing equipment pair more than 0.15mmFusing for optical fiber 3 is processed and attrition process, while being easy to actually used.
In the present embodiment, the intersection of substrate leading portion 11 and base plate rear section 12 is provided with excessive inclined-plane 13.Excessive inclined-plane 13Setting be able to ensure that the stress that optical fiber 3 is subject at excessive inclined-plane 13 is smaller, improve product reliability and be made it is qualifiedRate, in addition, in actual use, the setting on excessive inclined-plane 13 can also be easy to accommodate tail glue 4 or other fixing devices, makeOptical fiber 3 is using more stable with process.
In the present embodiment, upper level of the bottom surface of each V-shaped groove with base plate rear section 12 is consistent.Such settingAfter ensure that optical fiber 3 is arranged on V-shaped groove, it is highly consistent substantially with base plate rear section 12, on the one hand can so preventThe presence of the gradient damages optic fibre force, on the other hand can reduce the angle of the smooth curved way of optical fiber 3, the more conducively biography of optical signalIt is defeated.In the present invention, the floor height of V-shaped groove can also be slightly above the height or slightly below base plate rear section 12 of base plate rear section 12Height.
Refer to Fig. 4, to achieve these goals, present invention also offers it is a kind of for VSCEL or PIN arrays couplingThe manufacture method of self focusing light fibre array, the manufacture method is comprised the following steps：
Step S1, substrate processing：A slope is processed on substrate, substrate is divided into substrate leading portion and base plate rear section by slope,Again multiple V-shaped grooves being adapted with optical fiber shape size are opened up in the upper surface of substrate leading portion；
Step S2, condensing body welding：In one section of condensing body of the equal welding in one end of every optical fiber, every section of length and size of condensing bodyIt is consistent；
Step S3, optical fiber assembling：The optical fiber that every welding has condensing body is placed in V-shaped groove corresponding on substrate, and willOne end that welding has condensing body forward extends out from substrate leading portion, and keeps the length that every optical fiber stretches out consistent, finally by cover plateIt is fixed on the upper surface of substrate leading portion to fix optical fiber, constitutes fiber array；
Step S4, condensing body grinding：The condensing body on optical fiber assembled to every is ground, and is ground on every condensing bodyGrinding can be with the optical flat of reflected light signal, and optical flat and the angle that substrate bottom surface is in 30 ° to 60 °.
In the present embodiment, upper level of the bottom surface of each V-shaped groove with base plate rear section is consistent in step sl.
In the present embodiment, a diameter of 0.15-0.25mm of the sphere for coming is fused in step S2.
In the present embodiment, step S3 is also coated including tail glue：Covered on every optical fiber between cover plate and base plate rear sectionHave the tail glue for fixing and protecting optical fiber, and tail glue height of the height less than or equal to cover plate.
In the present embodiment, optical flat and substrate bottom surface are in 30 ° to 60 ° of angle in step S4.
Advantage of the invention is that：
1st, the fiber array that the present invention is provided, has condensing body, then energy is ground on condensing body in one end welding of every optical fiberEnough optical flats that total reflection is realized to optical signal；Condensing body has self-focusing effect in itself, will can be irradiated into thereinOptical fiber is assembled, then the cooperation with optical flat, can simultaneously realize the advantage of lens light gathering and optical flat reflected light, phaseThan being substantially reduced in existing utilization separate lenses and optical flat work in combination its cost, it is also added significantly to optical fiber in additionThe tolerance of array, its adjustable extent is bigger when coupling adjustment is carried out to optical fiber, so as to reduce difficulty and the increasing of couplingThe efficiency of coupling is added；
2nd, one end of every light of the invention processes condensing body, and wherein condensing body optical flat is with the angle of substrate bottom surface30 ° to 60 ° can realize well optical signal be irradiated on optical flat after total reflection, make optical flat in no plated filmIn the case of, can well realize the total reflection of optical signal by the reflection of angle.
3rd, the condensing body and optical fiber in the present invention are integral type structure, and its optically focused angle etc. need not be adjusted additionally, canIt is high by property, it is mounted directly optical fiber and processes the i.e. achievable high-precision light path coupling of condensing body, improve coupling efficiency.
Disclosed above is only several specific embodiments of the invention, but the present invention is not limited to this, any abilityWhat the technical staff in domain can think change should all fall into protection scope of the present invention.