CN117154544A - Low-cost miniaturized semiconductor laser optical fiber coupling module - Google Patents
Low-cost miniaturized semiconductor laser optical fiber coupling module Download PDFInfo
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- CN117154544A CN117154544A CN202311235165.2A CN202311235165A CN117154544A CN 117154544 A CN117154544 A CN 117154544A CN 202311235165 A CN202311235165 A CN 202311235165A CN 117154544 A CN117154544 A CN 117154544A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 47
- 239000013307 optical fiber Substances 0.000 title claims abstract description 37
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims description 29
- 230000010287 polarization Effects 0.000 claims description 11
- 238000003491 array Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
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- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 7
- 238000001259 photo etching Methods 0.000 description 3
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- 238000003466 welding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0225—Out-coupling of light
- H01S5/02255—Out-coupling of light using beam deflecting elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02469—Passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active cooling element like a TEC
Abstract
The invention relates to the field of semiconductor lasers, and provides a low-cost miniaturized semiconductor laser optical fiber coupling module, which comprises the following components: a COS heatsink; n single-tube lasers are packaged on the COS heat sink and are used for outputting n bundles of pump light, wherein n is more than or equal to 2; the fast axis collimating mirror is vertically obliquely arranged and is used for carrying out fast axis collimation on n beams of pump light, so that the stepped arrangement of the n beams of pump light is realized; a slow axis collimating mirror array for carrying out slow axis collimation on the n beams of pumping light which are subjected to fast axis collimation; the reflector array is used for spatially combining the n beams of pump light collimated by the fast axis and the slow axis; and the focusing mirror is used for focusing the pump light after the spatial beam combination and coupling the pump light into the optical fiber. The invention reduces the number of heat sinks and optical elements, reduces the cost, reduces the volume and the weight, and can simplify the manufacturing process of the heat sinks, thereby improving the production efficiency of the semiconductor laser optical fiber coupling module.
Description
Technical Field
The invention relates to the technical field of semiconductor lasers, in particular to a low-cost miniaturized semiconductor laser optical fiber coupling module.
Background
The semiconductor laser fiber coupling module is widely applied to pumping of a fiber laser, and in recent years, with the development of the fiber laser, in addition to the higher requirements on the output power and the brightness of the semiconductor laser fiber coupling module, the higher requirements are put on the manufacturing cost of the fiber coupling module.
The conventional semiconductor laser fiber coupling module mainly has two technical routes:
1. the BAR strip is taken as a basic unit, the power of the BAR strip with the length of 1cm is between 50W and 200W, 5 to 50 single-tube lasers are arranged on each BAR strip, the period of the single-tube lasers on the BAR strip is generally between 200 mu m and 500 mu m, the influence of thermal crosstalk is large due to small space among the single-tube lasers, the power of each single-tube laser is low, the output power of the single-tube laser with the width of 100 mu m is not more than 10W at most, the output power of the single-tube laser with the width of 200 mu m is not more than 15W at most, the output power of the single-tube laser with the width of 200 mu m is not more than 10W at most, and meanwhile, due to the large number of single-tube lasers on the BAR strip, the beam quality in the slow axis direction is poor, and relatively complex or high-cost beam shaping is generally required to be coupled into an optical fiber, for example, the U.S. patent No. 5808803A, US7027228B 2.
Therefore, the semiconductor laser fiber coupling module taking the BAR strip as a basic unit generally needs relatively complex or high-cost beam shaping, and because the heat generated by the BAR strip is concentrated, the output power of the single-tube laser is low, and more single tubes are needed to realize high-power output, so that the cost of a chip is increased.
2. The single-tube lasers packaged by COS (Chip on Submount) are usually packaged by COS (one-tube) on a heat sink, the width of each single-tube laser is 50-400 μm, the power of each single-tube laser is higher because each single-tube laser is independently packaged, the output power of each single-tube laser with the width of 100 μm exceeds 15W, the output power of each single-tube laser with the width of 200 μm exceeds 25W, each single-tube laser packaged by COS is arranged in a shell in a step manner, each single-tube laser firstly adopts a fast axis collimating lens to collimate a fast axis direction light beam, then adopts a slow axis collimating lens to collimate a slow axis direction light beam, then adopts a reflecting lens to realize one-dimensional stacking of the fast axis direction light beam, and finally focuses through a focusing lens and is coupled out by an optical fiber, and disclosed in China patent with the publication No. CN108092130A, CN 112928597A.
Therefore, the semiconductor laser optical fiber coupling module taking the single-tube laser as the basic unit has high output power of the single-tube laser, but needs more optical elements, has relatively larger structural size, has more steps of assembling and adjusting processes and has higher cost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a low-cost miniaturized semiconductor laser optical fiber coupling module, wherein a plurality of single-tube lasers are packaged on a heat sink, and a fast axis collimating mirror and a slow axis collimating mirror array are adopted to collimate fast axis direction light beams and slow axis direction light beams of the plurality of single-tube lasers, so that the number of heat sinks and optical elements is reduced, the cost of the semiconductor laser optical fiber coupling module is reduced, and meanwhile, the structure is more compact, and the volume and the weight of the semiconductor laser optical fiber coupling module are reduced.
In order to achieve the above purpose, the present invention adopts the following specific technical scheme:
the invention provides a low-cost miniaturized semiconductor laser optical fiber coupling module, which comprises:
a COS heatsink;
n laser units are packaged on the COS heat sink and are used for outputting n beams of pumping light, wherein n is more than or equal to 2;
the fast axis collimating mirror is vertically obliquely arranged and is used for carrying out fast axis collimation on n beams of pump light, so that the stepped arrangement of the n beams of pump light is realized;
a slow axis collimating mirror array for carrying out slow axis collimation on the n beams of pumping light which are subjected to fast axis collimation;
the reflector array is used for spatially combining the n beams of pump light collimated by the fast axis and the slow axis;
and the focusing mirror is used for focusing the pump light after the spatial beam combination and coupling the pump light into the optical fiber.
The invention provides another low-cost miniaturized semiconductor laser optical fiber coupling module, which is characterized by comprising:
m COS heat sinks which are arranged side by side and are arranged in a height step manner, wherein m is more than or equal to 2;
n laser units are respectively packaged on m COS heat sinks, at least two laser units are packaged on each COS heat sink, and the n laser units are used for outputting n beams of pumping light, wherein n is more than or equal to 2m;
m fast axis collimating mirrors are respectively arranged in a vertical inclined manner and are used for carrying out fast axis collimation on n beams of pump light so as to realize the ladder arrangement of the n beams of pump light;
m slow axis collimating mirror arrays for carrying out slow axis collimation on the n beams of pumping light which are subjected to fast axis collimation;
m reflector arrays for spatially combining the n pump light collimated by the fast axis and the slow axis;
and the focusing mirror is used for focusing the pump light after the spatial beam combination and coupling the pump light into the optical fiber.
Furthermore, the present invention provides a miniaturized semiconductor laser fiber coupling module with low cost, comprising:
two COS heat sinks which are oppositely arranged;
n laser units are respectively packaged on the two COS heat sinks, at least two laser units are packaged on each COS heat sink, and the n laser units are used for outputting n beams of pumping light, wherein n is more than or equal to 4;
the two fast axis collimating mirrors are respectively arranged in a vertical inclined manner and are used for carrying out fast axis collimation on n beams of pump light so as to realize the ladder arrangement of the n beams of pump light;
the two slow axis collimating mirror arrays are used for carrying out slow axis collimation on the n beams of pump light subjected to fast axis collimation;
the two reflector arrays are used for reflecting the n beams of pump light collimated by the fast axis and the slow axis;
the polarization beam combining prism is used for carrying out polarization beam combining on the n pump light reflected by the two reflector arrays;
and the focusing mirror is used for focusing the polarized and beam-combined pump light and coupling the pump light into the optical fiber.
Preferably, the included angle theta formed by the fast axis collimating mirror and the horizontal direction meets 0 < theta < 1 deg.
Preferably, the slow axis collimating lens array is a molded lens array, a lens array prepared by a photoetching process or a lens array formed by the spatial arrangement of n slow axis collimating lenses.
Preferably, the focusing lens is a single-piece spherical lens, a single-piece aspherical lens or an orthogonal cylindrical lens group.
Preferably, the laser unit further comprises a plurality of shells, wherein the quantity of the shells is the same as that of the COS heat sinks, and each COS heat sink packaged with the laser unit is respectively arranged in the corresponding shell.
Preferably, the shell is any one of copper, aluminum alloy, magnesium alloy, aluminum-based silicon carbide and silicon carbide.
Preferably, the laser units are individual single tube lasers or BAR strips composed of single tube lasers.
Compared with the prior art, the low-cost miniaturized semiconductor laser optical fiber coupling module provided by the invention has the following technical effects:
1. the plurality of single-tube lasers are packaged on one COS heat sink, and the pump light output by each single-tube laser is subjected to fast axis collimation through one fast axis collimating lens, so that the number of the COS heat sinks and optical elements is reduced, the cost of the semiconductor laser optical fiber coupling module can be reduced, and the volume and the weight of the semiconductor laser optical fiber coupling module can be reduced;
2. the fast axis collimating lens arranged in a vertical inclined mode can enable light beams emitted by the plurality of single-tube lasers to have a certain height difference, and the ladder arrangement of the light beams is achieved, so that a ladder structure can be prevented from being formed on the COS heat sink, the manufacturing process of the COS heat sink is simplified, the production efficiency of the semiconductor laser optical fiber coupling module is improved, and the production period is shortened.
Drawings
Fig. 1 is a block diagram of a low-cost miniaturized semiconductor laser fiber coupling module based on a single MCOS configuration provided in accordance with embodiment 1 of the present invention.
Fig. 2 is a block diagram of an MCOS provided according to embodiment 1 of the present invention.
Fig. 3 is a diagram showing a light field distribution of pump light after passing through a fast and slow axis when a fast axis collimator is parallel to a Y axis in the prior art.
Fig. 4 is a diagram showing the optical field distribution of pump light after passing through the fast and slow axes when the fast axis collimator lens provided in embodiment 1 of the present invention forms a certain angle with the Y axis.
Fig. 5 is a diagram showing the light field distribution after spatial beam combination by a mirror array according to embodiment 1 of the present invention.
Fig. 6 is a block diagram of a low-cost miniaturized semiconductor laser fiber coupling module based on two MCOS spatial beam combining according to embodiment 2 of the present invention.
Fig. 7 is a diagram showing a light field distribution after spatial beam combination by a mirror array when the fast axis collimator provided in embodiment 2 of the present invention forms a certain angle with the horizontal direction.
Fig. 8 is a block diagram of a low-cost miniaturized semiconductor laser fiber coupling module based on two MCOS polarization beam combinations provided in accordance with embodiment 3 of the present invention.
The abscissa of fig. 3, fig. 4, fig. 5, and fig. 7 shows the dimension in the fast axis direction of the light beam, and the ordinate shows the dimension in the slow axis direction of the light beam, in mm.
Reference numerals of embodiment 1 include: MCOS10, heat sink 101, laser unit 102, single-tube lasers 1021-102 n, gold wire 103, fast axis collimator 11, slow axis collimator array 12, mirror array 13, mirrors 131-13 n, focusing mirror 5, optical fiber 6.
Reference numerals of embodiment 2 include: MCOS10, heat sink 101, laser unit 102, single-tube lasers 1021-102 n, gold wire 103, fast axis collimator 11, slow axis collimator array 12, mirror array 13, mirrors 131-13 n, MCOS20, heat sink 201, laser unit 202, single-tube lasers 2021-202 n, gold wire 203, fast axis collimator 21, slow axis collimator lens array 22, mirror array 23, mirrors 231-23 n, focusing mirror 5, optical fiber 6.
Reference numerals of embodiment 3 include: MCOS10, heat sink 101, laser unit 102, single-tube lasers 1021-102 n, gold wire 103, fast-axis collimator 11, slow-axis collimator array 12, mirror array 13, mirrors 131-13 n, MCOS20, heat sink 201, laser unit 202, single-tube lasers 2021-202 n, gold wire 203, fast-axis collimator 21, slow-axis collimator lens array 22, mirror array 23, mirrors 231-23 n, polarization beam-combining prism 4, focusing mirror 5, optical fiber 6.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, like modules are denoted by like reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, a detailed description thereof will not be repeated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the invention.
Example 1
The low-cost miniaturized semiconductor laser fiber coupling module provided in embodiment 1 of the present invention is based on a single MCOS structure, MCOS (Multi Chip on Submount) refers to packaging a plurality of single-tube lasers on one COS heatsink.
Fig. 1 shows the structure of a low-cost miniaturized semiconductor laser fiber coupling module provided in embodiment 1 of the present invention.
As shown in fig. 1, the low-cost miniaturized semiconductor laser fiber coupling module provided in embodiment 1 includes an MCOS10, a fast axis collimator lens 11, a slow axis collimator lens array 12, a mirror array 13, a focusing lens 5, and an optical fiber 6.
Fig. 2 shows the structure of the MCOS provided in embodiment 1 of the present invention.
As shown in fig. 2, the MCOS10 includes a COS (Chip on Submount) heat sink 101 and a laser unit 102, where the laser unit 102 may be n independent single-tube lasers or a bar formed by n single-tube lasers, in fig. 2, n independent single-tube lasers are shown, which are respectively single-tube lasers 1021 to 102n, and the single-tube lasers 1021 to 102n are respectively packaged on the COS heat sink 101, more specifically, the single-tube lasers 1021 to 102n are respectively soldered on the COS heat sink 101 through AuSn solder at one time or step, the single-tube lasers 1021 to 102n are arranged side by side along the length direction of the COS heat sink 101, the single-tube lasers 1021 to 102n are in an insulated state, and the single-tube lasers 1021 to 102n are connected in series through a wire 103, each single-tube laser emits pumping light for n beams.
In embodiment 1, the length direction of the COS heatsink 101 is defined as the Y axis, the width direction of the COS heatsink 101 is defined as the Z axis, and the height direction of the COS heatsink 101 is defined as the X axis.
As shown in fig. 1, the number of the fast axis collimating lenses 11 is one and is arranged in the light emitting direction of the single-tube lasers 1021 to 102n, and the length of the fast axis collimating lenses 11 can cover the pump light emitted by the single-tube lasers 1021 to 102n, so that the fast axis collimation of n beams of pump light is realized through the fast axis collimating lenses 11.
The slow axis collimating lens array 12 may be a molded lens array or a lens array prepared by a photoetching process, the molded lens array and the lens array prepared by the photoetching process belong to an integrally formed lens array, and the slow axis collimating lens array 12 may also be a lens array formed by spatial arrangement of n slow axis collimating lenses.
The slow axis collimating mirror array 12 is arranged in the emergent direction of the fast axis collimating mirror 11, each slow axis collimating mirror in the slow axis collimating mirror array 12 corresponds to one single-tube laser respectively, and the slow axis collimation of n beams of pump light is realized through the slow axis collimating mirror array 12.
The reflector array 13 is arranged in the emergent direction of the slow axis collimating mirror array 12, the reflector array 13 comprises n reflectors, namely reflectors 131-13 n, one reflector corresponds to one single-tube laser, and n pump light collimated by the fast axis and the slow axis is reflected by the reflector array 13, so that spatial beam combination in the X axis direction is realized.
The focusing mirror 5 is disposed in a reflecting direction of the mirror array 13, and is used for focusing the pump light after spatial beam combination, and coupling the pump light into the optical fiber 6.
In the invention, the fast axis collimating mirror 11 is arranged in a vertical inclined way, namely an included angle theta is formed between the fast axis collimating mirror and the Y axis, the included angle theta is in a range of 0 < theta < 1 degrees, and the stepped arrangement of n beams of pump light is realized.
Fig. 3 shows the optical field distribution of pump light after passing through the fast and slow axes when the fast axis collimator lens is parallel to the Y axis in the prior art.
As shown in fig. 3, when the fast axis collimator is parallel to the Y axis, the n pump light beams are in a straight line along the Y axis direction, and there is no level difference, so that the step arrangement of the n pump light beams cannot be realized, and the spatial beam combination in the X axis direction cannot be realized by the reflection of the reflector 4.
Fig. 4 shows the optical field distribution of the pump light after passing through the fast and slow axes when the fast axis collimator lens provided in embodiment 1 of the present invention forms a certain angle with the Y axis.
As shown in fig. 4, when the fast axis collimator forms a certain included angle with the Y axis, a certain height difference exists between the n pump light beams along the Y axis direction, so as to realize the step arrangement of the n pump light beams.
Fig. 5 is a light field distribution after spatial beam combining by a mirror array according to embodiment 1 of the present invention.
As shown in fig. 5, after being reflected by the reflecting mirror 4, the n pump light beams are spatially combined along the X direction.
Because the prior art places the fast axis collimating mirror and the Y axis in parallel, if n beams of pumping light are required to have a height difference along the Y axis direction, COS heat sinks are required to be processed into a step structure, and a plurality of single-tube lasers are placed on steps with different heights on the COS heat sinks. Therefore, a plurality of working procedures are added when the COS heat sink is manufactured, the manufacturing process is complicated, the overall production efficiency of the semiconductor laser optical fiber coupling module is reduced, and the production period is prolonged.
According to the invention, the vertical inclination of the fast axis collimating mirror can realize the height difference of n beams of pumping light along the Y axis direction, COS heat sinks are not required to be processed into a step shape, namely, the upper surface of the COS heat sinks for welding a single-tube laser is a plane, and no height difference exists, so that the manufacturing process of the COS heat sinks can be simplified, the production efficiency of the semiconductor laser optical fiber coupling module is improved, and the production period is shortened.
The invention can realize light beam coupling by only adopting one fast axis collimating mirror and one COS heat sink, so the quantity of COS heat sinks and optical elements can be reduced, the cost of the semiconductor laser optical fiber coupling module can be reduced, and the volume and the weight of the semiconductor laser optical fiber coupling module can be reduced.
Example 2
The low-cost miniaturized semiconductor laser fiber coupling module provided by the embodiment 2 of the invention is based on two MCOS, and space beam combination is realized through the two MCOSs.
Fig. 6 shows the structure of a low-cost miniaturized semiconductor laser fiber coupling module based on two MCOS spatial beam combining according to embodiment 2 of the present invention.
As shown in fig. 6, the low-cost miniaturized semiconductor laser fiber coupling module includes an MCOS10, a fast axis collimator lens 11, a slow axis collimator lens array 12, a mirror array 13, an MCOS20, a fast axis collimator lens 21, a slow axis collimator lens array 22, a mirror array 23, a focusing lens 5, and an optical fiber 6.
The MCOS10 and the MCOS20 are arranged side by side in the Y-axis direction, and are arranged stepwise in the X-axis direction, i.e., the MCOS10 and the MCOS20 have a height difference.
The MCOS20 includes a COS heatsink 201 and a laser unit 202, the laser unit 202 includes single-tube lasers 2021 to 202n, the single-tube lasers 2021 to 202n are COS-packaged on the COS heatsink 201, the single-tube lasers 2021 to 202n are in an insulating state, and the single-tube lasers 2021 to 202n are serially connected together through a gold wire 203.
The fast axis collimator 21 is vertically and obliquely arranged in the emergent direction of the single-tube lasers 2021 to 202n, and is used for performing fast axis collimation on pump light emitted by the single-tube lasers 2021 to 202 n.
The slow axis collimator lens array 22 is disposed in the exit direction of the fast axis collimator lens 21, and is used for performing slow axis collimation on the pump light emitted by the single-tube lasers 2021 to 202 n.
The reflector array 23 is disposed in the exit direction of the slow axis collimator array 22, and is configured to reflect the pump light emitted by 2021 to 202n and collimated by the fast axis and the slow axis, so as to realize spatial beam combination of the pump light in the X axis direction.
The MCOS10 includes a COS heatsink 101 and a laser unit 102, the laser unit 102 includes single-tube lasers 1021-102 n, the single-tube lasers 1021-102 n are COS-encapsulated on the COS heatsink 101, the single-tube lasers 1021-102 n are in an insulating state, and the single-tube lasers 1021-102 n are connected in series by a wire 103.
Of course, the laser units 202 and 102 may also be bars composed of a plurality of single-tube lasers.
The fast axis collimating mirror 11 is vertically and obliquely arranged in the emergent direction of the single-tube lasers 1021-102 n, the position of the fast axis collimating mirror 11 is aligned with the position of the fast axis collimating mirror 21 in the Z direction, and the fast axis collimating mirror 11 is used for carrying out fast axis collimation on pump light emitted by the single-tube lasers 1021-102 n.
The slow axis collimator lens array 12 is disposed in the exit direction of the fast axis collimator lens 11 and aligned with the slow axis collimator lens array 22 in the Z direction, and is used for performing slow axis collimation on the pump light emitted by the single tube lasers 1021 to 102 n.
The reflector array 13 is disposed at a position that is located in both the exit direction of the slow axis collimating mirror array 12 and the reflection direction of the reflector array 23, and is used for reflecting the pump light emitted by the single-tube lasers 1021-102 n and collimated by the fast axis and the slow axis, so as to realize spatial beam combination of the pump light in the X axis direction.
The mirror array 13 and the mirror array 23 realize the spatial beam combination of the pump light emitted by the single-tube lasers 1021 to 102n and the pump light emitted by the single-tube lasers 2021 to 202n in the X-axis direction, and as shown in fig. 7, the pump light is coupled into the optical fiber 6 through the focusing of the focusing mirror 5.
Example 3
The low-cost miniaturized semiconductor laser fiber coupling module provided by the embodiment 3 of the invention is based on two MCOS, and polarization beam combination is realized through the two MCOSs.
Fig. 8 shows the structure of a low-cost miniaturized semiconductor laser fiber coupling module based on two MCOS polarization beam combinations provided in accordance with embodiment 3 of the present invention.
As shown in fig. 8, the low-cost miniaturized semiconductor laser fiber coupling module provided in embodiment 3 includes an MCOS10, a fast axis collimator lens 11, a slow axis collimator lens array 12, a mirror array 13, an MCOS20, a fast axis collimator lens 21, a slow axis collimator lens array 22, a mirror array 23, a focusing lens 5, and an optical fiber 6.
The MCOS10 and the MCOS20 are arranged at equal height in a relative manner; wherein the MCOS20 comprises a COS heat sink 201 and a laser unit 202, the laser unit 202 comprises single-tube lasers 2021-202 n or a bar composed of the single-tube lasers 2021-202 n, the single-tube lasers 2021-202 n are COS-packaged on the COS heat sink 201, the single-tube lasers 2021-202 n are in an insulating state, and the single-tube lasers 2021-202 n are connected in series through a gold wire 203; the MCOS10 includes a COS heatsink 101 and a laser unit 102, the laser unit 102 includes single-tube lasers 1021-102 n, the single-tube lasers 1021-102 n are COS-encapsulated on the COS heatsink 101, the single-tube lasers 1021-102 n are in an insulating state, and the single-tube lasers 1021-102 n are connected in series by a wire 103.
The fast axis collimator 21 is vertically and obliquely arranged in the emergent direction of the single-tube lasers 2021 to 202n, and is used for performing fast axis collimation on pump light emitted by the single-tube lasers 2021 to 202 n.
The slow axis collimator lens array 22 is disposed in the exit direction of the fast axis collimator lens 21, and is used for performing slow axis collimation on the pump light emitted by the single-tube lasers 2021 to 202 n.
The fast axis collimating mirror 11 is vertically and obliquely arranged in the emergent direction of the single-tube lasers 1021 to 102n, and is used for carrying out fast axis collimation on pump light emitted by the single-tube lasers 1021 to 102 n.
The slow axis collimating mirror array 12 is disposed in the exit direction of the fast axis collimating mirror 11, and is used for performing slow axis collimation on the pump light emitted by the single-tube lasers 1021-102 n.
The reflector array 23 is disposed in the emergent direction of the slow axis collimating mirror array 22, and is used for reflecting the pump light emitted by the single-tube lasers 2021-202 n and collimated by the fast axis and the slow axis; the reflector array 13 is disposed in the exit direction of the slow axis collimator array 12, and is used for reflecting the pump light emitted by the single-tube lasers 1021-102 n and collimated by the fast axis and the slow axis.
The polarization beam combining prism 4 is arranged in the reflecting directions of the reflector array 23 and the reflector array 13, and the pump light emitted by the single-tube lasers 2021 to 202n is reflected by the reflector array 23 and the pump light emitted by the single-tube lasers 1021 to 102n is reflected by the reflector array 13, and then polarization beam combining is realized by the polarization beam combining prism 4, and is focused by the focusing lens 5 and coupled into the human optical fiber 6.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
The above embodiments of the present invention do not limit the scope of the present invention. Any of various other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. A low cost miniaturized semiconductor laser fiber optic coupling module comprising:
a COS heatsink;
n laser units are packaged on the COS heat sink and are used for outputting n beams of pumping light, wherein n is more than or equal to 2;
the fast axis collimating mirror is vertically obliquely arranged and is used for carrying out fast axis collimation on n beams of pump light, so that the stepped arrangement of the n beams of pump light is realized;
a slow axis collimating mirror array for carrying out slow axis collimation on the n beams of pumping light which are subjected to fast axis collimation;
the reflector array is used for spatially combining the n beams of pump light collimated by the fast axis and the slow axis;
and the focusing mirror is used for focusing the pump light after the spatial beam combination and coupling the pump light into the optical fiber.
2. A low cost miniaturized semiconductor laser fiber optic coupling module comprising:
m COS heat sinks which are arranged side by side and are arranged in a height step manner, wherein m is more than or equal to 2;
n laser units are respectively packaged on m COS heat sinks, at least two laser units are packaged on each COS heat sink, and the n laser units are used for outputting n beams of pumping light, wherein n is more than or equal to 2m;
m fast axis collimating mirrors are respectively arranged in a vertical inclined manner and are used for carrying out fast axis collimation on n beams of pump light so as to realize the ladder arrangement of the n beams of pump light;
m slow axis collimating mirror arrays for carrying out slow axis collimation on the n beams of pumping light which are subjected to fast axis collimation;
m reflector arrays for spatially combining the n pump light collimated by the fast axis and the slow axis;
and the focusing mirror is used for focusing the pump light after the spatial beam combination and coupling the pump light into the optical fiber.
3. A low cost miniaturized semiconductor laser fiber optic coupling module comprising:
two COS heat sinks which are oppositely arranged;
n laser units are respectively packaged on the two COS heat sinks, at least two laser units are packaged on each COS heat sink, and the n laser units are used for outputting n beams of pumping light, wherein n is more than or equal to 4;
the two fast axis collimating mirrors are respectively arranged in a vertical inclined manner and are used for carrying out fast axis collimation on n beams of pump light so as to realize the ladder arrangement of the n beams of pump light;
the two slow axis collimating mirror arrays are used for carrying out slow axis collimation on the n beams of pump light subjected to fast axis collimation;
the two reflector arrays are used for reflecting the n beams of pump light collimated by the fast axis and the slow axis;
the polarization beam combining prism is used for carrying out polarization beam combining on the n pump light reflected by the two reflector arrays;
and the focusing mirror is used for focusing the polarized and beam-combined pump light and coupling the pump light into the optical fiber.
4. A low cost miniaturized semiconductor laser fiber coupling module as in any of claims 1-3 wherein the fast axis collimator forms an angle θ with the horizontal that satisfies 0 < θ < 1 °.
5. A low cost miniaturized semiconductor laser fiber coupling module according to any one of claims 1 to 3, wherein the slow axis collimator array is a molded lens array, a lens array prepared by a photolithographic etching process, or a lens array formed by spatial arrangement of n slow axis collimators.
6. A low cost miniaturized semiconductor laser fiber coupling module as claimed in any one of claims 1 to 3 wherein said focusing lens is a monolithic spherical lens, monolithic aspherical lens or an orthogonal cylindrical lens group.
7. A low cost miniaturized semiconductor laser fiber coupling module as claimed in any one of claims 1 to 3 further comprising a same number of housings as COS heat sinks, each of the COS heat sinks encapsulating a laser unit being disposed within a corresponding housing.
8. A low cost miniaturized semiconductor laser fiber coupling module as in claim 7 wherein said housing is any one of copper, aluminum alloy, magnesium alloy, aluminum-based silicon carbide, silicon carbide.
9. A low cost miniaturized semiconductor laser fiber coupling module according to any of claims 1 to 3, wherein the laser unit is a stand alone single tube laser or BAR consisting of single tube lasers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311235165.2A CN117154544A (en) | 2023-09-22 | 2023-09-22 | Low-cost miniaturized semiconductor laser optical fiber coupling module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311235165.2A CN117154544A (en) | 2023-09-22 | 2023-09-22 | Low-cost miniaturized semiconductor laser optical fiber coupling module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117154544A true CN117154544A (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311235165.2A Pending CN117154544A (en) | 2023-09-22 | 2023-09-22 | Low-cost miniaturized semiconductor laser optical fiber coupling module |
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| Country | Link |
|---|---|
| CN (1) | CN117154544A (en) |
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2023
- 2023-09-22 CN CN202311235165.2A patent/CN117154544A/en active Pending
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