Laser beam combining system and laser

Abstract

The utility model discloses a laser beam combining system and a laser, the system comprises a base, a plurality of bar devices, a plurality of collimating lens groups, a plurality of reflectors and a coupling mirror, the base is provided with a mounting surface, the mounting surface is a plane, and the plurality of bar devices, the plurality of collimating lens groups, the plurality of reflectors and the coupling mirror are all arranged on the mounting surface. The plurality of bar devices are sequentially arranged along a first direction, and each bar device is provided with a plurality of luminous points; the collimating lens group is positioned on a light emitting path of the bar device; the reflecting mirror, the collimating mirror group and the bar device are arranged on the same light path in a one-to-one correspondence manner, a first included angle is formed between the normal direction of the reflecting mirror and the plane where the mounting surface is located, and the first included angle is an acute angle; the coupling mirror is arranged on a reflection path of the reflector. According to the invention, the number of collimating mirror groups and reflectors is reduced, so that the light beam shaping and combining structure is effectively simplified, the overall size and weight of the laser are reduced, and miniaturization and light weight of the high-power laser are realized.

Description

Technical Field

[0001] The present application belongs to the field of laser technology, and in particular relates to a laser beam combining system and a laser. Background Art

[0002] In the related art, the semiconductor laser chips in the laser pump source are mostly single-die packaging structures. Each laser chip needs to be packaged separately, and each laser chip needs to be set with a beam shaping and beam combining structure. When the power of the laser is large, the required laser chip and beam combining and shaping structure are large, resulting in a large overall volume and heavy weight of the laser pump source. Utility Model Content

[0003] The embodiments of the present application provide a laser beam combining system and a laser to solve the problem that the pump source of the existing high-power laser is large in size and heavy in weight.

[0004] In a first aspect, an embodiment of the present application provides a laser beam combining system comprising:

[0005] A base, wherein the base is provided with a mounting surface, and the mounting surface is a plane;

[0006] A plurality of bar devices are arranged on the mounting surface, the plurality of bar devices are arranged in sequence along a first direction, and each of the bar devices has a plurality of light-emitting points;

[0007] A plurality of collimating lens groups are arranged on the mounting surface, and the collimating lens groups are located on the light output path of the bar device;

[0008] A plurality of reflectors are mounted on the mounting surface, wherein the reflectors, the collimating lens group and the bar device are arranged in a one-to-one correspondence on the same optical path, and a first angle is formed between the normal direction of the reflectors and the plane where the mounting surface is located, and the first angle is an acute angle;

[0009] The coupling mirror is mounted on the mounting surface and is arranged on the reflection path of the reflection mirror.

[0010] Optionally, the collimating lens group includes a fast-axis collimating lens and a slow-axis collimating lens, and the fast-axis collimating lens is closer to the bar device than the slow-axis collimating lens.

[0011] Optionally, the slow-axis collimating lens has an optical lens corresponding to the light-emitting point, and a plurality of the optical lenses are integrally formed.

[0012] Optionally, the collimating lens assembly further includes a lens seat, the lens seat is fixed on the mounting surface, and the fast axis collimating lens is mounted on the lens seat.

[0013] Optionally, a ceramic sheet is provided on the base, and the bar device, the collimating lens group and the reflector are installed on a side of the ceramic sheet away from the base.

[0014] Optionally, a plurality of series conductive modules are provided on the mounting surface, the series conductive modules correspond to the bar devices one by one, and a plurality of the series conductive modules are connected in series with a plurality of the bar devices.

[0015] Optionally, the mounting surface includes a first table top and a second table top, the second table top is higher than the first table top, the collimating lens group and the reflector are mounted on the first table top, the bar device and the coupling mirror are mounted on the second table top, and the normal direction of the reflector forms the first angle with the plane where the first table top is located.

[0016] Optionally, the coupling mirror includes a light incident surface and a light emitting surface, the light incident surface is closer to the reflector than the light emitting surface, a second angle is formed between the light incident surface and the mounting surface, the second angle is an obtuse angle, and the light emitting surface is arranged perpendicular to the mounting surface.

[0017] Optionally, the first angle and the second angle satisfy the following formula:

[0018]

[0019] Where, y is the second angle;

[0020] x is one-half of the first angle;

[0021] n is the refractive index of the coupling mirror.

[0022] In a second aspect, an embodiment of the present application further provides a laser, comprising any one of the laser beam combining systems described above.

[0023] The laser beam combining system and the laser provided in the embodiments of the present application include a base, a plurality of bar devices, a plurality of collimating lens groups and a reflector, each bar device having a plurality of light-emitting points, the bar devices, the collimating lens groups and the reflector being arranged one-to-one on the same optical path, and the plurality of light-emitting points simultaneously realize the collimation and beam combining of the laser beams emitted by the plurality of light-emitting points through the same collimating lens group and the reflector, thereby reducing the number of collimating lens groups and the reflector, overcoming the problem of large volume and heavy weight of the pump source of the existing high-power laser, so that the beam shaping and beam combining structure are effectively simplified, thereby reducing the overall volume and weight of the pump source, and realizing the miniaturization and lightweight of the high-power laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0025] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0026] Figure 1 A system diagram of a laser beam combining system provided in an embodiment of the present application.

[0027] Figure 2 for Figure 1 Side view of.

[0028] Figure 3 for Figure 1 Top view of the .

[0029] Figure 4 This is a labeled diagram of the reflector and coupling mirror in the laser beam combining system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] The embodiments of the present application provide a laser beam combining system and a laser to solve the problem that the pump source of the existing high-power laser is large in size and heavy in weight.

[0032] See also Figure 1 , Figure 3 and Figure 3 As shown, Figure 1 A system diagram of a laser beam combining system provided in an embodiment of the present application, Figure 2 for Figure 1 Side view of Figure 3 for Figure 1 The embodiment of the present application provides a laser beam combining system, which includes a base 100, a plurality of bar devices 200, a plurality of collimating lens groups 300 and a plurality of reflecting mirrors 400.

[0033] In this embodiment, the base 100 can be made of metal material, which has good heat dissipation, is conducive to heat dissipation of the bar device 200, and improves the heat dissipation effect. The base 100 is provided with a groove, and the bottom of the groove is provided with a mounting surface 110, and the mounting surface 110 is a plane.

[0034] In this embodiment, see Figure 1 As shown, the bar device 200 is a laser chip, and the bar device 200 has multiple light-emitting points. One bar device 200 can emit multiple laser beams at the same time, such as one bar device 200 can emit 5 laser beams at the same time. Multiple bar devices 200 are arranged on the mounting surface 110, and the multiple bar devices 200 are arranged in sequence along a first direction, which can be the length direction of the base 100. The distances between adjacent bar devices 200 are the same, and the number of light-emitting points of each bar device 200 can be the same or different.

[0035] In this embodiment, see Figure 1 As shown, the collimator lens assembly 300 is installed on the mounting surface 110. The collimator lens assembly 300 is located on the light output path of the bar device 200. The collimator lens assembly 300 is used to collimate and adjust the laser beam emitted by the bar device 200. All the collimator lens assemblies 300 are installed in the same plane. Multiple collimator lens assemblies 300 are arranged in sequence along a first direction, which is the same as the arrangement direction of the bar device 200, and the distances between adjacent collimator lens assemblies 300 are the same.

[0036] In this embodiment, see Figure 1 As shown, multiple reflectors 400 are mounted on the mounting surface 110, and the reflectors 400, collimating lens group 300 and bar device 200 are arranged one by one on the same optical path. The number of reflectors 400 is the same as the number of bar devices 200, and all reflectors 400 are located in the same plane. The normal direction of the reflector 400 forms a first angle with the plane where the mounting surface is located, and the first angle is an acute angle, such as 45°, and the first angle of each reflector 400 is the same. Multiple reflectors 400 are arranged in parallel in sequence along the first direction, the distance between adjacent reflectors 400 is the same, and the height of multiple reflectors 400 is the same.

[0037] In this embodiment, see Figure 1 As shown, the coupling mirror 500 is installed on the mounting surface 110. The coupling mirror 500 is set on the reflection path of all the reflectors 400. The laser beam emitted by the bar device 200 is collimated by the collimating mirror group 300 corresponding to the reflector 400, and is coupled into the optical fiber through the coupling mirror 500 after being reflected by the reflector 400. The laser beams reflected by all the reflectors 400 pass through different height positions of the coupling mirror 500. The coupling mirror 500 is a prism.

[0038] It can be understood that in the embodiment of the present application, each bar device 200 can emit multiple laser beams at the same time, and each bar device 200 can share a collimating lens group 300 and a reflector 400, which can realize the collimation and reflection of the laser beam, so that the beam shaping and beam combining structure are effectively simplified, thereby reducing the overall volume and weight of the laser, and realizing the miniaturization and lightweight of the high-power laser.

[0039] In the above embodiment, see Figure 1 As shown, the collimator lens group 300 includes a fast-axis collimator lens 310 and a slow-axis collimator lens 320. The fast-axis collimator lens 310 is closer to the bar device 200 than the slow-axis collimator lens 320. The multiple laser beams emitted by the bar device 200 are collimated and shaped by the fast-axis collimator lens 310 and the slow-axis collimator lens 320 and then emitted to the reflector 400400. The fast-axis collimator lenses 310 of the multiple collimator lens groups 300 are arranged in sequence along the first direction, and the spacing between adjacent fast-axis collimator lenses 310 is the same. The projection of the receiving surface of the fast-axis collimator lens 310 on the light-emitting surface of the bar device 200 covers the light-emitting surface of the bar device 200. The laser beams emitted from all light-emitting points of the bar device 200 are emitted through the same fast-axis collimator lens 310, thereby reducing the number of fast-axis collimator lenses 310 and reducing the volume and weight of the laser.

[0040] Based on the above implementation, see Figure 1 As shown, the slow axis collimating lens 320 has an optical lens corresponding to the light emitting point, and a plurality of optical lenses are integrally formed. The plurality of slow axis collimating lenses 320 are arranged in sequence along the first direction, and the spacing between adjacent slow axis collimating lenses 320 is the same. The plurality of optical lenses are integrally formed to form the slow axis collimating lens 320, which facilitates the installation of the slow axis collimating lens 320. The slow axis collimating lens 320 occupies a small space, which is conducive to realizing a miniaturized laser.

[0041] In other embodiments, the slow axis collimating lens 320 may also include multiple optical lenses, the number of optical lenses corresponds to the number of light emitting points of the bar device 200, and an optical lens is arranged corresponding to each light emitting point of the bar device 200. Adjacent optical lenses may be spaced a certain distance apart or may be sequentially attached, thereby achieving the purpose of collimating and shaping multiple laser beams.

[0042] Based on the above implementation, see Figure 1 As shown, the collimating lens assembly 300 further includes a lens holder 330 . The lens holder 330 is fixed on the mounting surface 110 , and the fast axis collimating lens 310 is mounted on the lens holder 330 .

[0043] It can be understood that in the laser beam combining system assembly, the fast axis collimating lens 310 is installed on the lens holder 330, and then the lens holder 330 and the fast axis collimating lens 310 are integrally installed on the base 100, and the lens holder 330 fits the mounting surface 110 of the base 100, which facilitates the installation and maintenance of the fast axis collimating lens 310.

[0044] In some embodiments, see Figure 1 As shown, a ceramic sheet 120 is provided on the base 100, and the bar device 200, the collimating lens group 300 and the reflector 400 are installed on the side of the ceramic sheet 120 away from the base 100. The ceramic sheet 120 has the advantages of good thermal conductivity and good insulation. The ceramic sheet 120 can insulate the bar device 200 from the base 100, thereby ensuring safety during power supply. The collimating lens group 300 and the reflector 400 are arranged on the ceramic sheet 120, and the ceramic sheet 120 can reduce the thermal resistance between the collimating lens group 300 and the reflector 400 and the base 100, thereby improving the heat dissipation effect of the collimating lens group 300 and the reflector 400.

[0045] On the basis of the above-mentioned embodiment, a plurality of ceramic sheets 120 are provided, and the collimating lens group 300 and the reflector 400 on the same optical path are installed on the same ceramic sheet 120. The ceramic sheet 120 is a long rectangular plate structure. As a variation, the fast axis collimating lens 310 of the collimating lens group 300 can also be installed on a ceramic sheet 120, the slow axis collimating lens 320 can be installed on a ceramic sheet 120, and the reflector 400 can be installed on a ceramic sheet 120. Specifically, the number and shape of the ceramic sheets 120 can be set as needed.

[0046] In some embodiments, see Figure 1 As shown, the mounting surface 110 includes a first table 111 and a second table 112, the second table 112 is higher than the first table 111, the collimating lens group 300 and the reflector 400 are mounted on the first table 111, the bar device 200 and the coupling mirror 500 are mounted on the second table 112, and a first angle is formed between the normal direction of the reflector 400 and the plane where the first table 111 is located. The mounting surface 110 is designed to be a stepped surface with different heights, so that the centers of the collimating lens group 300 and the reflector 400 are aligned with the centers of the bar device 200 and the coupling mirror 500, which is beneficial to beam coupling and ensures the coupling effect.

[0047] In some embodiments, see Figure 1As shown, the laser beam combining system further includes a plurality of series conductive modules 600, which are mounted on the mounting surface 110. The series conductive modules correspond to the bar devices 200 one by one, and the plurality of series conductive modules 600 are sequentially connected in series with the bar devices 200, and each series conductive module 600 is configured to supply power to one bar device 200. The series conductive module 600 includes two conductive blocks, which facilitates the connection of the plurality of bar devices 200 to the power supply, facilitates wiring, and has a beautiful appearance.

[0048] In the above embodiment, see Figure 4 As shown, the coupling mirror 500 includes a light incident surface 510 and a light emitting surface 520. The light incident surface 510 is closer to the reflector 400 than the light emitting surface 520. A second angle is formed between the light incident surface 510 and the mounting surface 110. The second angle is an obtuse angle, and the light emitting surface is perpendicular to the mounting surface.

[0049] Based on the above implementation, the second angle and the first angle satisfy the following formula:

[0050]

[0051] Where, y is the second angle;

[0052] x is one-half of the first angle;

[0053] n is the refractive index of the coupling mirror 500 .

[0054] The present application also provides a laser including any one of the above-mentioned laser beam combining systems.

[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0057] The laser beam combining system and laser provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A laser beam combining system, characterized in that: include: A base, wherein the base is provided with a mounting surface, and the mounting surface is a plane; A plurality of bar devices are arranged on the mounting surface, the plurality of bar devices are arranged in sequence along a first direction, and each of the bar devices has a plurality of light-emitting points; A plurality of collimating lens groups are arranged on the mounting surface, and the collimating lens groups are located on the light output path of the bar device; A plurality of reflectors are mounted on the mounting surface, wherein the reflectors, the collimating lens group and the bar device are arranged in a one-to-one correspondence on the same optical path, and a first angle is formed between the normal direction of the reflectors and the plane where the mounting surface is located, and the first angle is an acute angle; The coupling mirror is mounted on the mounting surface and is arranged on the reflection path of the reflection mirror.

2. The laser beam combining system according to claim 1, characterized in that: The collimating lens group includes a fast-axis collimating lens and a slow-axis collimating lens, and the fast-axis collimating lens is closer to the bar device than the slow-axis collimating lens.

3. The laser beam combining system according to claim 2, characterized in that: The slow axis collimating lens has an optical lens corresponding to the light emitting point, and a plurality of the optical lenses are integrally formed.

4. The laser beam combining system according to claim 2, characterized in that: The collimating lens assembly further comprises a lens seat, the lens seat is fixed on the mounting surface, and the fast axis collimating lens is mounted on the lens seat.

5. The laser beam combining system according to claim 1, characterized in that: A ceramic sheet is arranged on the base, and the bar device, the collimating lens group and the reflecting mirror are installed on a side of the ceramic sheet away from the base.

6. The laser beam combining system according to claim 1, characterized in that: A plurality of series conductive modules are arranged on the mounting surface, the series conductive modules correspond to the bar devices one by one, and a plurality of the series conductive modules are connected in series with a plurality of the bar devices.

7. The laser beam combining system according to claim 1, characterized in that: The mounting surface includes a first table top and a second table top, the second table top is higher than the first table top, the collimating lens group and the reflector are mounted on the first table top, the bar device and the coupling mirror are mounted on the second table top, and the normal direction of the reflector forms the first angle with the plane where the first table top is located.

8. The laser beam combining system according to claim 1, characterized in that: The coupling mirror includes a light incident surface and a light emitting surface. The light incident surface is closer to the reflector than the light emitting surface. A second angle is formed between the light incident surface and the mounting surface. The second angle is an obtuse angle. The light emitting surface is perpendicular to the mounting surface.

9. The laser beam combining system according to claim 8, characterized in that: The first angle and the second angle satisfy the following formula: Where, y is the second angle; x is one-half of the first angle; n is the refractive index of the coupling mirror.

10. A laser, characterized in that: include: A laser beam combining system as claimed in any one of claims 1 to 9.

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