Alternatively arranged laser coupling system

Abstract

The utility model relates to an alternately arranged laser coupling system, which comprises a first laser module, a second laser module, a third laser module, a first beam combining module, a second beam combining module, a convergence module and a single-core optical fiber, wherein the light transmission direction of the single-core optical fiber is set as a first direction, and a first side and a second side are respectively formed on two sides of the first direction; the transmitting unit of the first laser module and the transmitting unit of the second laser module are both located on the first side, and the transmitting unit of the third laser module is located on the second side. The laser modules of the second laser module and the laser modules of the third laser module are sequentially and alternately arranged in the first direction. According to the alternately arranged laser coupling system, the plurality of laser modules are alternately arranged on the two sides of the light transmission direction of the single-core optical fiber, high-power coupling output is obtained, and the alternately arranged laser coupling system has the advantages of being compact in system structure and small in size.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor lasers, in particular to an alternately arranged laser coupling system. Background Art

[0002] The output beam of the laser diode has an elliptical energy distribution and astigmatism. Generally, after being collimated in the vertical direction, there is still a residual divergence angle in the horizontal direction. When coupled to the optical fiber through a converging lens, the size of the converged light spot is limited by the residual divergence angle, making it difficult for the coupled light spot to enter the thinner optical fiber, affecting the coupling efficiency and the optical power output of the optical fiber.

[0003] In order to increase the output optical power, it is generally necessary to use multiple laser diodes for fiber coupling. Due to the physical size and installation size limitations, the output beams of the laser diodes are spaced apart from each other, and the converging lens has a physical aperture limitation, which limits the number of received beams and the spot size. Moreover, when the beam spacing is too large, the numerical aperture of the converging beam is too large and cannot be fully coupled into the optical fiber.

[0004] Therefore, in order to obtain high-power coupled output, higher requirements are placed on the arrangement of laser diodes, the layout of optical components, and the size and compactness of the system, which is a problem that technical personnel in this field currently need to solve. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the prior art lacks a system that takes into account both high-power coupled output and small-size structure, and provides an alternatingly arranged laser coupling system that has the advantages of compact system structure and small size while achieving high-power coupled output.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides an alternately arranged laser coupling system, including a single-core optical fiber, wherein the light transmission direction of the single-core optical fiber is set to a first direction, and the two sides of the first direction respectively form a first side and a second side, and the laser coupling system further includes:

[0007] A first laser module, used for emitting a laser beam A;

[0008] A second laser module, used for emitting a laser beam B;

[0009] A third laser module, used for emitting a laser beam C;

[0010] A first beam combining module, used for combining the laser beam A and the laser beam B into a first combined beam;

[0011] A second beam combining module, used for combining the first combined light beam with the laser beam C into a second combined light beam;

[0012] A converging module, used for coupling the second combined light beam to the single-core optical fiber;

[0013] The first laser module, the second laser module and the third laser module all include laser modules, and the laser modules all include emitting units; the emitting units of the first laser module and the second laser module are both located on the first side; the emitting unit of the third laser module is located on the second side;

[0014] The laser modules included in the second laser module and the laser modules included in the third laser module are arranged alternately in sequence along the first direction.

[0015] In one embodiment of the present utility model, the laser modules included in the second laser module are m green laser modules, and the m green laser modules each include:

[0016] a green light emitting unit, located at the first side, for emitting green light;

[0017] A first green light reflecting unit, located at the second side, for performing a first reflection on the green light emitted by the green light emitting unit;

[0018] The second laser module further includes a second green light reflecting unit, which is located at the second side and is used for performing a second reflection on the green light reflected by all the first green light reflecting units included in the m green laser modules.

[0019] In one embodiment of the present utility model, the green light emitting unit is a green laser diode;

[0020] The first green light reflecting unit is a micro-reflector corresponding to the green light laser diode;

[0021] The second green light reflecting unit is a large reflecting mirror.

[0022] In one embodiment of the present utility model, the laser modules included in the third laser module are n red laser modules, and the n red laser modules each include:

[0023] A red light emitting unit, located at the second side, for emitting red light;

[0024] a collimating unit, used for collimating the red light emitted by the red light emitting unit;

[0025] A first red light reflecting unit, located at the first side, for reflecting the red light collimated by the collimating unit for the first time;

[0026] The third laser module further includes a second red light reflecting unit, which is located at the first side and is used for performing a second reflection on the red light reflected by all the first red light reflecting units included in the n red light laser modules.

[0027] In one embodiment of the present utility model, the red light emitting unit is a red laser diode;

[0028] The collimating unit is composed of a fast-axis cylindrical lens and a slow-axis cylindrical lens; wherein the fast-axis cylindrical lens is connected to the red laser diode;

[0029] The first red light reflecting unit is a micro-reflector corresponding to the red light laser diode;

[0030] The second red light reflecting unit is a large reflecting mirror.

[0031] In one embodiment of the present utility model, the laser modules included in the first laser module are s blue light laser modules, and the s blue light laser modules each include:

[0032] A blue light emitting unit, located at the first side, for emitting blue light;

[0033] The blue light reflecting unit is used to reflect the blue light emitted by the blue light emitting unit.

[0034] In one embodiment of the present utility model, the blue light emitting unit is a blue laser diode;

[0035] The blue light reflecting unit is a micro-reflector corresponding to the blue light laser diode.

[0036] In one embodiment of the present invention, the first beam combining module is a first beam combining mirror, which is used to combine the laser beam A and the laser beam B into a first combined beam of light.

[0037] In one embodiment of the present invention, the second beam combining module is a second beam combining mirror, which is used to combine the first combined light beam with the laser beam C into a second combined light beam.

[0038] In one embodiment of the present invention, the converging module is a converging lens, which is used to couple the second combined light beam to the single-core optical fiber.

[0039] The above technical solution of the utility model has at least the following advantages compared with the prior art:

[0040] This embodiment provides an alternately arranged laser coupling system, alternately arranges multiple laser modules on both sides of the light transmission direction of a single-core optical fiber, combines the laser beams twice, and then uses a converging unit for coupling. While obtaining high-power coupled output, it has the advantages of compact system structure and small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0042] Figure 1 It is a three-dimensional schematic diagram of an alternately arranged laser coupling system in an embodiment of the utility model;

[0043] Figure 2 yes Figure 1 The schematic diagram of the structure of the alternately arranged laser coupling system observed along the X direction;

[0044] Figure 3 yes Figure 1 Front view of the alternating laser coupling system shown.

[0045] Description of the Figures in the Specification:

[0046] 101, 102 blue laser diodes; 111, 112 micro mirrors;

[0047] 201, 202, 203, 204 green laser diodes; 211, 212, 213, 214 micro-reflectors; 221 large reflector;

[0048] 301, 302, 303, 304 red laser diodes; 311, 312, 313, 314 fast axis cylindrical lenses; 321, 322, 323, 324 slow axis cylindrical lenses; 331, 332, 333, 334 micro-reflectors; 341 large reflector;

[0049] S1 first beam combiner; S2 second beam combiner; S3 converging lens; S4 single-core optical fiber;

[0050] Z first direction; E first side; F second side. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0052] This embodiment provides an alternately arranged laser coupling system, including a single-core optical fiber, wherein the light transmission direction of the single-core optical fiber is set to a first direction, and the two sides of the first direction respectively form a first side and a second side, and the laser coupling system further includes:

[0053] A first laser module, used for emitting a laser beam A;

[0054] A second laser module, used for emitting a laser beam B;

[0055] A third laser module, used for emitting a laser beam C;

[0056] A first beam combining module, used for combining the laser beam A and the laser beam B into a first combined beam;

[0057] A second beam combining module, used for combining the first combined light beam with the laser beam C into a second combined light beam;

[0058] A converging module, used for coupling the second combined light beam to the single-core optical fiber;

[0059] The first laser module, the second laser module and the third laser module all include laser modules, and the laser modules all include emitting units; the emitting units of the first laser module and the second laser module are both located on the first side; the emitting unit of the third laser module is located on the second side;

[0060] The laser modules included in the second laser module and the laser modules included in the third laser module are arranged alternately in sequence along the first direction.

[0061] This embodiment provides an alternately arranged laser coupling system, alternately arranges multiple laser modules on both sides of the light transmission direction of a single-core optical fiber, combines the laser beams twice, and then uses a converging unit for coupling. While obtaining high-power coupled output, it has the advantages of compact system structure and small size.

[0062] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0063] This embodiment provides an alternately arranged laser coupling system, including a single-core optical fiber S4, wherein the light transmission direction of the single-core optical fiber S4 is set to a first direction Z, and the two sides of the first direction Z respectively form a first side E and a second side F;

[0064] The three-dimensional schematic diagram of the laser coupling system is shown in Figure 1 As shown; Figure 1 The schematic diagram of the structure of the laser coupling system observed along the X direction is shown in Figure 2 As shown, in Figure 2 The optical elements used in this embodiment are fully marked; Figure 3 is a front view of the laser coupling system, combined with Figure 1 and Figure 2 It can be seen that the laser coupling system has the advantages of compact structure and small size in arrangement layout.

[0065] The first laser module is a blue laser module, including two blue laser modules: a first blue laser module and a second blue laser module;

[0066] The first blue laser module includes a blue laser diode 101 and a micro-reflector 111, and the second blue laser module includes a blue laser diode 102 and a micro-reflector 112;

[0067] Taking the first blue laser module as an example, the optical elements of the blue laser module are further described as follows:

[0068] The blue laser diode 101 is a blue light emitting unit, located at the first side E, and used for emitting blue light;

[0069] The micro-reflector 111 is a blue light reflecting unit, which is used to reflect the blue light emitted by the blue laser diode 101, and provide a basis for the subsequent first beam combination;

[0070] The same applies to the second blue light laser module.

[0071] The second laser module is a green laser module, including four green laser modules: a first green laser module, a second green laser module, a third green laser module and a fourth green laser module; the second laser module also includes a second green light reflection unit;

[0072] The first green laser module includes a green laser diode 201 and a micro-reflector 211, the second green laser module includes a green laser diode 202 and a micro-reflector 212, the third green laser module includes a green laser diode 203 and a micro-reflector 213, and the fourth green laser module includes a green laser diode 204 and a micro-reflector 214;

[0073] The second green light reflecting unit is a large reflecting mirror 221;

[0074] Taking the first green laser module as an example, the optical elements of the green laser module are further described as follows:

[0075] The green laser diode 201 is a green light emitting unit, located at the first side E, and used for emitting green light;

[0076] The micro-reflector 211 is a first green light reflecting unit, located at the second side F, and used for performing a first reflection on the green light emitted by the green laser diode 201;

[0077] The large reflector 221 is located at the second side F, and is used to perform a second reflection on the green light reflected by the micro reflector 211, so as to provide a basis for the subsequent first beam combination;

[0078] The same applies to the second green laser module, the third green laser module and the fourth green laser module.

[0079] The third laser module is a red laser module, comprising four red laser modules: a first red laser module, a second red laser module, a third red laser module and a fourth red laser module; the third laser module further comprises a second red light reflection unit;

[0080] The first red laser module includes a red laser diode 301, a fast axis cylindrical lens 311, a slow axis cylindrical lens 321 and a micro-reflector 331; the second red laser module includes a red laser diode 302, a fast axis cylindrical lens 312, a slow axis cylindrical lens 322 and a micro-reflector 332; the third red laser module includes a red laser diode 303, a fast axis cylindrical lens 313, a slow axis cylindrical lens 323 and a micro-reflector 333; the fourth red laser module includes a red laser diode 304, a fast axis cylindrical lens 314, a slow axis cylindrical lens 324 and a micro-reflector 334;

[0081] The second red light reflecting unit is a large reflecting mirror 341;

[0082] Taking the first red laser module as an example, the optical elements of the red laser module are further described:

[0083] The red laser diode 301 is a red light emitting unit, located at the second side F, and used for emitting red light;

[0084] The fast axis cylindrical lens 311 and the slow axis cylindrical lens 321 are collimating units, which are used to collimate the red light emitted by the red laser diode 301; the fast axis cylindrical lens 311 is connected to the red laser diode 301;

[0085] The micro-reflector 331 is a first red light reflecting unit, located at the first side E, and used for performing a first reflection on the red light collimated by the collimating unit;

[0086] The large reflector 341 is located at the first side E, and is used to perform a second reflection on the red light reflected by the micro reflector 331, so as to provide a basis for the subsequent second beam combination;

[0087] The same applies to the second red laser module, the third red laser module and the fourth red laser module.

[0088] It is worth noting that the first red laser module, the first green laser module, the second red laser module, the second green laser module, the third red laser module, the third green laser module, the fourth red laser module and the fourth green laser module are alternately arranged in sequence along the first direction Z, which improves the compactness of the system structure and reduces the system volume.

[0089] The first beam combining module is a first beam combining mirror S1, which is used to combine the blue light reflected by the micro-reflectors 111 and 112 with the green light reflected by the large reflector 221 into a first combined light beam, thereby achieving the first beam combining;

[0090] The second beam combining module is a second beam combining mirror S2, which is used to combine the first combined light beam with the red light reflected by the large reflector 341 into a second combined light beam, thereby achieving a second beam combining;

[0091] The converging module is a converging lens S3, which is used to couple the second combined light beam to the single-core optical fiber S4.

[0092] In summary, this embodiment provides an alternatingly arranged laser coupling system, in which multiple laser modules are alternately arranged on both sides of the light transmission direction of a single-core optical fiber, the laser beams are combined twice, and then coupled using a converging unit, thereby obtaining high-power coupled output while having the advantages of a compact system structure and a small size.

[0093] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. An alternatingly arranged laser coupling system, comprising a single-core optical fiber, wherein the light transmission direction of the single-core optical fiber is set to a first direction, and the two sides of the first direction respectively form a first side and a second side, characterized in that: The laser coupling system also includes: A first laser module, used for emitting a laser beam A; A second laser module, used for emitting a laser beam B; A third laser module, used for emitting a laser beam C; A first beam combining module, used for combining the laser beam A and the laser beam B into a first combined beam; A second beam combining module, used for combining the first combined light beam with the laser beam C into a second combined light beam; A converging module, used for coupling the second combined light beam to the single-core optical fiber; The first laser module, the second laser module and the third laser module all include laser modules, and the laser modules all include emitting units; the emitting units of the first laser module and the second laser module are both located on the first side; the emitting unit of the third laser module is located on the second side; The laser modules included in the second laser module and the laser modules included in the third laser module are arranged alternately in sequence along the first direction.

2. The alternating laser coupling system according to claim 1, characterized in that: The laser modules included in the second laser module are m green laser modules, and the m green laser modules each include: a green light emitting unit, located at the first side, for emitting green light; A first green light reflecting unit, located at the second side, for performing a first reflection on the green light emitted by the green light emitting unit; The second laser module further includes a second green light reflecting unit, which is located at the second side and is used for performing a second reflection on the green light reflected by all the first green light reflecting units included in the m green laser modules.

3. The alternating arrangement laser coupling system according to claim 2, characterized in that: The green light emitting unit is a green laser diode; The first green light reflecting unit is a micro-reflector corresponding to the green light laser diode; The second green light reflecting unit is a large reflecting mirror.

4. The alternating laser coupling system according to claim 1, characterized in that: The laser modules included in the third laser module are n red laser modules, and the n red laser modules each include: A red light emitting unit, located at the second side, for emitting red light; a collimating unit, used for collimating the red light emitted by the red light emitting unit; A first red light reflecting unit, located at the first side, for reflecting the red light collimated by the collimating unit for the first time; The third laser module further includes a second red light reflecting unit, which is located at the first side and is used for performing a second reflection on the red light reflected by all the first red light reflecting units included in the n red light laser modules.

5. The alternating laser coupling system according to claim 4, characterized in that: The red light emitting unit is a red laser diode; The collimating unit is composed of a fast-axis cylindrical lens and a slow-axis cylindrical lens; wherein the fast-axis cylindrical lens is connected to the red laser diode; The first red light reflecting unit is a micro-reflector corresponding to the red light laser diode; The second red light reflecting unit is a large reflecting mirror.

6. The alternating laser coupling system according to claim 1, characterized in that: The laser modules included in the first laser module are s blue light laser modules, and the s blue light laser modules each include: A blue light emitting unit, located at the first side, for emitting blue light; The blue light reflecting unit is used to reflect the blue light emitted by the blue light emitting unit.

7. The alternating laser coupling system according to claim 6, characterized in that: The blue light emitting unit is a blue laser diode; The blue light reflecting unit is a micro-reflector corresponding to the blue light laser diode.

8. The alternating laser coupling system according to claim 1, characterized in that: The first beam combining module is a first beam combining mirror, which is used to combine the laser beam A and the laser beam B into a first combined beam.

9. The alternating laser coupling system according to claim 1, characterized in that: The second beam combining module is a second beam combining mirror, which is used to combine the first combined light beam with the laser beam C into a second combined light beam.

10. The alternating laser coupling system according to claim 1, characterized in that: The converging module is a converging lens, which is used to couple the second combined light beam to the single-core optical fiber.

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