CN102201649A - Multi-LD (Laser Diode) intensive array - Google Patents

Abstract

The invention relates to a multi-LD (Laser Diode) intensive array, which comprises a plurality of pylons arranged intensively, wherein an LD is fixed on each pylon; each pylon is an inclined pylon; and the inclination direction of the upper surface is the same as the power supply indicating direction of the LD or the output direction of a tail optical fiber. Preferably, each pylon adopted by the array is a two-dimensional inclined pylon; the upper surface of each pylon inclines along two different directions; the direction of one pitch-up inclination angle is the same as the power supply indicating direction of the LD; and the direction of the other pitch-up inclination angle is the same as the output direction of the tail optical fiber. The multi-LD intensive array has the advantages that: (1) an LD electrode and the output tail optical fiber are convenient to sort out; (2) the space is fully utilized; (3) compared with a step-shaped array, the intensive array has the characteristics that: the height of the intensive array is reduced, and the cooling effect can be ensured; and (4) high flexibility is achieved, and intensive arrays can be manufactured and used separately, manufactured separately and used as parallel arrays or manufactured and used integrally according to different requirements.

Description

A kind of many LD closely spaced array

Technical field

The present invention relates to a kind of laser diode (LD) carrier, particularly a kind of a plurality of LD closely spaced arrays.

Background technology

Along with the development of laser, more and more higher to the requirement of pumping source power.Be subjected to the restriction of single LD power, often need to use simultaneously dozens of LD.In order to reduce the volume of high power laser, these LD must be arranged in compactly a LD array, guarantee their temperature control effect simultaneously.The working temperature of LD between 10 ℃ to 50 ℃, can be rapidly heated in continuing to increase the process of electric current usually.The variations in temperature of LD can make the outgoing wave long hair give birth to drift, influences light---the light conversion efficiency of whole laser, and might damage other devices.That is to say that the temperature of LD can influence the emergent power and the dependability of fiber laser.

LD array commonly used at present has two kinds:.

A kind of is that each LD is arranged in one-dimensional plane, though processing is simple, when LD quantity was a lot, area occupied was very big, and duty ratio is little, and utilance is low, as Fig. 2, Fig. 3, shown in Figure 4.What the figure bend was partly represented is the shared area of single LD.

Another kind is earlier LD to be divided into groups, and every group of stepped arrangement of LD then in the time will increasing LD, in order to protect the coupling output optical fibre of LD, can only increase ladder quantity.Compare with the planar alignment mode although it is so and can save area, but when LD quantity was a lot, whole heat sink highly significant increased, not only be subjected to the restriction of laser whole height design, and along with increase highly, the temperature control effect of LD also can significantly descend, as shown in Figure 5.

Obviously, when LD was a lot, traditional LD array arrangement mode all can't satisfy the requirement of high power laser to small size and temperature control.

Summary of the invention

Final purpose of the present invention is the many LD closely spaced array that obtains small size, realizes having high volume utilization, expansion is good, the high-power LD array design of high efficiency temperature control, is suitable as the pumping source module of high power laser/laser amplifier.

The invention provides a kind of many LD closely spaced array, comprise a plurality of pylons of dense arrangement, fix a LD on each pylon, wherein each pylon is the inclination pylon, and the incline direction of upper surface is identical with power supply direction indication or the tail optical fiber outbound course of LD.

Preferably, the pylon that the present invention adopts is two-dimentional inclination pylon, and the pylon upper surface tilts along two different directions; The direction at one of them inclination angle of facing upward is identical with the power supply direction indication of LD, and the direction at another inclination angle of facing upward is identical with the tail optical fiber outbound course of LD.

Pylon of the present invention can be made separately, and is fixed on the base plate of LD array.Adopt the mode of making separately, the processing and making process of pylon is very simple, realizes easily.

Pylon of the present invention also can go out whole array through the one processing and fabricating, adopts the mode course of processing relative complex of one processing, but can avoid the loose contact problem between pylon and the base plate, thereby guarantees the temperature control effect of LD array.

Pylon is when making separately, and the present invention also is included in copper pipe that pylon inside or base plate interior bury underground or the cooling bath that processes, as the path of cooling fluid.

Array is that one adds man-hour, and the present invention also is included in copper pipe of burying underground pylon array inside or the cooling bath that processes, as the path of cooling fluid.

The present invention compares with existing apparatus has following outstanding advantage:

(1) the LD electrode is convenient to arrangement more with the output tail optical fiber.

(2) make full use of the space, compare with the one-dimensional plane arrangement mode, the total projection area reduces about 1/3rd.

(3) compare the height that has reduced array with stepped array, and can guarantee cooling effect.

(4) flexibility is strong, can select to make separately also independent use, make separately also array use, integral production and one use according to different needs.

Description of drawings

Fig. 1 is LD used in the present invention.(a) being the vertical view of LD, (b) is the front view of LD, (c) is the left view of LD.

Fig. 2 is traditional flushsystem aligning method 1.

Fig. 3 is traditional flush system aligning method 2.

Fig. 4 is traditional flush system aligning method 3.

Fig. 5 is traditional staged aligning method.(a) being the vertical view of LD, (b) is the front view of LD, (c) is the left view of LD.

Fig. 6 is the installation diagram (is example with the square column platform) of two-dimentional inclination pylon unit and LD.

Fig. 7 is the installation diagram (the square column array with integral production classify example) of two-dimentional tilt column array row with LD.

The tail optical fiber of pumping source module (LD array) of Fig. 8 after for assembling arranged and the electrode schematic diagram of arranging.(a) be the tail optical fiber schematic diagram of arranging, (b) the electrode schematic diagram (is example with the square column platform) of arranging.

Fig. 9 is two-dimentional inclination pylon unit.(a) be respectively the schematic diagram of different viewing angles with (b), (c) be the perspective view (is example with the square column platform) of (b).

Figure 10 is the cooling scheme schematic diagram of pylon.(a) be the pylon array cooling scheme schematic diagram of integral production.(b) be the pylon unit cooling scheme schematic diagram of making separately.

Figure 11 is a two-dimentional inclination pylon processing method schematic diagram (is example with the square column platform).

Among Fig. 1～Figure 11; 1---LD; 2---the LD electrode; 3---LD output tail optical fiber protective sleeve; 4---single LD area occupied in traditional flushsystem aligning method 1; 5---single LD area occupied in traditional flush system aligning method 2; 6---single LD area occupied in traditional flush system aligning method 3; 7---single LD area occupied in the staged aligning method; 8---placing the ladder of LD in the staged aligning method, 9---two-dimentional inclination pylon unit, 10---two-dimentional tilt column array row; 11---two-dimentional tilt column array row assemble the pumping source module that the back is formed with LD; 12---the LD fixing hole, 13---the series connection water route, 14---the monomer water route; 15---cooling fluid inlet or outlet, 16---process the used cuboid in two-dimentional inclination pylon unit.

Embodiment

Below in conjunction with accompanying drawing, specify preferred implementation of the present invention.

Fig. 6 is an independent pylon of realizing according to the present invention, and upper surface is equipped with a LD.Fig. 7 is many LD closely spaced array of the one processing of the realization according to the present invention, is made up of with the LD that is fixed on the pylon a plurality of pylons 9.Each pylon among Fig. 6 and Fig. 7 issquare pylon 9 as shown in Figure 9.Each pylon is two-dimentional inclination pylon, and the pylon upper surface tilts along two different directions: the direction at one of them inclination angle of facing upward, i.e. Y direction, identical with the power supply direction indication 2 of LD, the direction at another inclination angle of facing upward, promptly directions X is identical with the tail optical fiber outbound course 3 of LD.Owing to adopted the mode of two-dimentional inclination, compare with traditional tiling mode, can make full use of the space, the total projection area can reduce about 1/3rd.Compare with the staged array,, can guarantee temperature control effect owing to reduced the array height.

The tail optical fiber of pumping source module (LD array) of Fig. 8 after for assembling arranged and the electrode schematic diagram of arranging.(a) be the tail optical fiber schematic diagram of arranging, (b) the electrode schematic diagram (is example with the square column platform) of arranging.As we know from the figure, owing to adopted the mode of two-dimentional inclination, the LD electrode is convenient to arrangement more with the output tail optical fiber.

The LD array that many LD array among Fig. 7 goes out for the mode integral manufacturing by one processing.Adopting the mode of one processing is in order to guarantee the temperature control effect of LD array, to be suitable for the occasion high to temperature requirements.

Figure 10 is the cooling scheme schematic diagram of pylon and array.(a) the seriesconnection water route 13 for processing in the pylon array of integral production is by the temperature control of the realization of the heat exchange between cooling fluid and the pylon array to LD.(b)coolant channels 14 for processing in the pylon unit that makes separately.

The processing method of the two dimension inclination pylon that uses in the present embodiment as shown in figure 11.With single square column platform is example, and the processing method of two-dimentional inclination pylon unit module is, from the summit of acuboid 16, is made as an A, cuts along the ARC plane, and some B and some C are respectively the point of two on the rib.The requirement of other design factors is depended in the position of some B and some C, as temperature control effect, LD size etc.Point B and some C are not the summits.After finishing cutting, cuboid is two-dimentional inclination pylon unit module, and LD is fixed on its surface, form one new for heat sink LD module.The module that each is new is closely arranged as requested, just can form a compact arranged LD array, forms a big pumping source module.Also can directly process all two dimension inclination pylons on an integral section, method is similar.After processing the inclined-plane,, and process cooling bath in lower surface or inside in upper surface fixed processing hole.

The above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvement; perhaps part technical characterictic wherein is equal to replacement, these improvement and replace and also should be considered as protection scope of the present invention.

Claims (6)

1. LD closely spaced array more than a kind comprises a plurality of pylons of dense arrangement, fixes a LD on each pylon, it is characterized in that each pylon is the inclination pylon, and the incline direction of upper surface is identical with power supply direction indication or the tail optical fiber outbound course of LD.

2. a kind of many LD closely spaced array according to claim 1 is characterized in that, described pylon is two-dimentional inclination pylon, and the pylon upper surface tilts along two different directions; The direction at one of them inclination angle of facing upward is identical with the power supply direction indication of LD, and the direction at another inclination angle of facing upward is identical with the tail optical fiber outbound course of LD.

3. a kind of many LD closely spaced array according to claim 1 and 2 is characterized in that, described pylon is to make separately, and is fixed on the base plate of LD array.

4. a kind of many LD closely spaced array according to claim 3 is characterized in that, also is included in copper pipe that pylon inside or base plate interior bury underground or the cooling bath that processes, as the path of cooling fluid.

5. a kind of many LD closely spaced array according to claim 1 and 2 is characterized in that, the whole array of described pylon for going out through the one processing and fabricating.

6. a kind of many LD closely spaced array according to claim 5 is characterized in that, also is included in copper pipe of burying underground pylon array inside or the cooling bath that processes, as the path of cooling fluid.

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