Semiconductor laser with polarization

Abstract

The utility model relates to the technical field of lasers, in particular to a semiconductor laser with polarization, which comprises a shell, a first laser transmitting module and a second laser transmitting module, and is characterized in that the first laser transmitting module and the second laser transmitting module are respectively arranged on two sides in the length direction in the shell; a polarizer used for beam combining and light emitting is arranged between the first laser emitting module and the second laser emitting module, emergent light of the first laser emitting module is reflected to the polarizer through the first reflecting mirror, and emergent light of the second laser emitting module is reflected to the polarizer through the reflecting module. And a focus lens and an end cap are mounted at the light emitting end of the polarizer. Two paths of light are placed at the two ends, light is emitted in a polarized mode in the middle, heat accumulation caused by parallel placement of the two paths of light is reduced, the heat dissipation area is increased, meanwhile, light path can be reduced, and coupling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lasers, and specifically relates to a semiconductor laser with polarization. Background Art

[0002] A semiconductor laser, also known as a laser diode, is a laser that uses semiconductor materials as the working substance. Due to its advantages such as high brightness, high reliability, small volume and easy integration, it has been widely used in fields such as medical beauty, solid laser pump sources, 3D printing, and laser processing.

[0003] The existing semiconductor lasers with polarization generally have the following problems:

[0004] (1) In the prior art, the dual-channel light is basically symmetrically placed. For example, in the Chinese patent literature database, for the pump source and laser with the application number 202323517321.2, the dual-channel light is symmetrically placed in a relatively compact manner, which is prone to heat accumulation and results in poor heat dissipation effect;

[0005] (2) The lasers are all made of copper shells and are basically water-cooled, with high production costs and relatively single cooling methods. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a semiconductor laser with polarization to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A semiconductor laser with polarization, including a housing, a first laser emission module and a second laser emission module. The first laser emission module and the second laser emission module are respectively arranged on both sides of the housing in the length direction. And a polarization mirror for combining and emitting light is arranged between the first laser emission module and the second laser emission module. The emitted light of the first laser emission module is reflected by a first reflector and directed towards the polarization mirror. The emitted light of the second laser emission module is reflected by a reflection module and directed towards the polarization mirror. A focusing mirror and an end cap are installed at the light-emitting end of the polarization mirror.

[0008] Further, the first laser emission module and the second laser emission module have the same structure, and both include a plurality of groups of corresponding chips, collimating mirrors and reflectors, and the plurality of groups of chips, collimating mirrors and small reflectors are installed inside the housing along the length direction of the housing.

[0009] Further, the first laser emission module and the second laser emission module are centrosymmetric or axially symmetrically arranged on both sides of the housing in the length direction.

[0010] Further, the reflection module includes a second reflector and a third reflector that are parallel to each other. The second reflector is disposed on a side close to the outgoing light of the second laser emission module, and the third reflector is disposed on a side close to the polarizer. The outgoing light of the second laser emission module is reflected by the second reflector and then directed towards the third reflector, and then reflected by the third reflector and directed towards the polarizer.

[0011] Further, a filter for filtering the returned light is disposed on a side of the first reflector close to the first laser emission module.

[0012] Further, a fourth reflector for reflecting the waste light is disposed on a side of the polarizer.

[0013] Further, the material of the housing is aluminum.

[0014] Further, heat dissipation teeth are disposed on the outer side wall of the housing.

[0015] Further, a water channel is disposed inside the housing.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) By symmetrically disposing the first laser emission module and the second laser emission module on both sides in the length direction inside the housing and emitting light through polarization in the middle, the heat accumulation caused by placing the dual-channel light side by side can be reduced, the heat dissipation area can be increased, and at the same time, by emitting light through polarization in the middle, the optical path can be reduced and the coupling efficiency can be improved.

[0018] (2) By setting the material of the housing to aluminum, the cost is reduced. Heat dissipation teeth are disposed at the bottom of the housing or a water channel is disposed inside the housing, and heat dissipation can be achieved by water cooling or air cooling methods to meet different usage requirements. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structural schematic diagram of Embodiment 1 of the present utility model;

[0020] Figure 2 It is a top-view structural schematic diagram of Embodiment 1 of the present utility model;

[0021] Figure 3 It is a top-view structural schematic diagram of Embodiment 2 of the present utility model.

[0022] In the figure: 1. Outer shell; 2. First laser emission module; 201. First chip; 202. First collimating mirror; 203. First small reflecting mirror; 3. Second laser emission module; 301. Second chip; 302. Second collimating mirror; 303. Second small reflecting mirror; 4. First reflecting mirror; 5. Reflection module; 501. Second reflecting mirror; 502. Third reflecting mirror; 6. Polarizing mirror; 7. Focusing mirror; 8. End cap; 9. Filter; 10. Fourth reflecting mirror; 11. Heat dissipation teeth. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. In the description of the present invention, it should be noted that the descriptions of terms such as "first" and "second" are only for the purpose of description, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. For the terms "including" and any variations thereof in the description and claims of the present invention and the above accompanying drawings, the intention is to cover non-exclusive inclusion.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, in the description of the present invention, it should be understood that the orientation or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0025] Example 1, please refer to Figure 1-2The utility model provides an embodiment: a polarized semiconductor laser, comprising a housing 1, a first laser emitting module 2 and a second laser emitting module 3, the first laser emitting module 2 and the second laser emitting module 3 are respectively arranged on both sides of the inner length direction of the housing 1, the first laser emitting module 2 and the second laser emitting module 3 have the same structure, both comprising a plurality of groups of one-to-one corresponding chips, collimating mirrors and reflecting mirrors, and a plurality of groups of chips, collimating mirrors and small reflecting mirrors are installed inside the housing 1 along the length direction of the housing 1, specifically, a plurality of step portions are arranged on both sides of the inner part of the housing 1, the height of the step portions gradually decreases from the two sides to the middle, a plurality of groups of chips, collimating mirrors and reflecting mirrors are installed on the step portions in a one-to-one correspondence, the laser emitted by the chip is collimated by the collimating mirror and then emitted to the small reflecting mirror, the small reflecting mirror reflects the incident light at 90° and then emits it horizontally to the middle of the housing 1.

[0026] In this embodiment, the first laser emitting module 2 and the second laser emitting module 3 are centrally symmetrically arranged on both sides of the inner length direction of the housing 1. Figure 2 The first laser emitting module 2 includes several groups of first chips 201, first collimating mirrors 202 and first small reflectors 203, and the second laser emitting module 3 includes several groups of second chips 301, second collimating mirrors 302 and second small reflectors 303. The first chip 201 and the second small reflector 303 are arranged on the same side inside the shell 1, and the first small reflector 203 and the second chip 301 are arranged on the same side inside the shell 1.

[0027] A polarizer 6 for beam combining and emitting light is arranged between the first laser emitting module 2 and the second laser emitting module 3. The emitted light of the first laser emitting module 2 is reflected by the first reflector 4 and emitted toward the polarizer 6. The polarizer 6 is specifically a PBS (polarization beam splitter prism). The emitted light of the second laser emitting module 3 is reflected by the reflector module 5 and emitted toward the polarizer 6. A focusing mirror 7 and an end cap 8 are installed at the light emitting end of the polarizer 6. The reflector module 5 includes a second reflector 501 and a third reflector 502 which are parallel to each other. The second reflector 501 is arranged on the side close to the emitted light of the second laser emitting module 3, and the third reflector 502 is arranged on the side close to the polarizer 6. The emitted light of the second laser emitting module 3 is reflected by the second reflector 501 and turned toward the third reflector 502, and then reflected by the third reflector 502 and emitted toward the polarizer 6. Figure 2 The second reflector 501 is tiltedly arranged on the side of the second small reflector 303 at the end of the second laser emitting module 3, the third reflector 502 is arranged on the side of the polarizer 6 close to the second laser emitting module 3, the first reflector 4 is tiltedly arranged on the side of the first small reflector 203 at the end of the first laser emitting module 2, the polarizer 6 is located on the side of the first reflector 4 close to the first collimator 202, and the two output lights of the first laser emitting module 2 and the second laser emitting module 3 are emitted at 90° to the polarizer 6.

[0028] Place the dual-channel light at both ends and emit light with polarization in the middle, which can reduce the heat accumulation caused by placing the dual-channel light side by side, increase the heat dissipation area, and at the same time, emitting light with polarization in the middle can reduce the optical path and improve the coupling efficiency.

[0029] Further, referring to the attached Figure 2 , when the power of the laser is relatively high, a filter 9 for filtering the returned light is provided on the side of the first reflector 4 close to the first laser emission module 2. A fourth reflector 10 for reflecting the waste light is provided on one side of the polarizing mirror 6, and an absorbent structure is provided on one side inside the housing 1 to absorb the waste light reflected by the fourth reflector 10.

[0030] In this embodiment, the material of the housing 1 is aluminum, which has a relatively low cost. A heat dissipation tooth 11 is integrally provided on the outer side wall of the housing 1, and the heat dissipation effect can be improved when used in conjunction with a fan. Further, a water channel (not shown in the figure) can also be provided inside the housing 1, and water is passed through it during operation to cool the laser, meeting different usage requirements.

[0031] Embodiment 2, please refer to Figure 3 , the difference between this embodiment and Embodiment 1 is that the first laser emission module 2 and the second laser emission module 3 are arranged axially symmetrically on both sides in the length direction inside the housing 1, that is, the first chip 201 and the second chip 301 are arranged on the same side inside the housing 1, the first collimating mirror 202 and the second collimating mirror 302 are arranged on the same side inside the housing 1, the first small reflector 203 and the second small reflector 303 are arranged on the same side inside the housing 1, and at the same time, in this embodiment, the second reflector 501 and the first reflector 4 are on the same side.

[0032] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A semiconductor laser with polarization, comprising a housing (1), a first laser emission module (2) and a second laser emission module (3), characterized in that: The first laser emission module (2) and the second laser emission module (3) are respectively arranged on both sides of the inner part of the housing (1) in the length direction, and a polarizing mirror (6) for combining and emitting light is arranged between the first laser emission module (2) and the second laser emission module (3). The emitted light of the first laser emission module (2) is reflected by the first reflector (4) and directed towards the polarizing mirror (6). The emitted light of the second laser emission module (3) is reflected by the reflection module (5) and directed towards the polarizing mirror (6). A focusing lens (7) and an end cap (8) are installed at the light-emitting end of the polarizing mirror (6).

2. The semiconductor laser with polarization according to claim 1, characterized in that: The first laser emission module (2) and the second laser emission module (3) have the same structure, and both include several groups of corresponding chips, collimating lenses and reflectors, and several groups of chips, collimating lenses and small reflectors are installed inside the housing (1) along the length direction of the housing (1).

3. The semiconductor laser with polarization according to claim 1, characterized in that: The first laser emission module (2) and the second laser emission module (3) are symmetrically arranged about the center or axisymmetrically on both sides of the inner part of the housing (1) in the length direction.

4. A semiconductor laser with polarization according to claim 1, characterized in that: The reflection module (5) includes a second reflector (501) and a third reflector (502) that are parallel to each other. The second reflector (501) is arranged on the side close to the emitted light of the second laser emission module (3), and the third reflector (502) is arranged on the side close to the polarizing mirror (6). The emitted light of the second laser emission module (3) is reflected by the second reflector (501) and redirected towards the third reflector (502), and then is reflected by the third reflector (502) and directed towards the polarizing mirror (6).

5. A polarized semiconductor laser according to claim 1, wherein: A filter (9) for filtering the returned light is arranged on the side of the first reflector (4) close to the first laser emission module (2).

6. A semiconductor laser with polarization according to claim 1, characterized in that: A fourth reflector (10) for reflecting the stray light is arranged on one side of the polarizing mirror (6).

7. A semiconductor laser with polarization according to claim 1, characterized in that: The material of the housing (1) is aluminum.

8. A semiconductor laser with polarization according to claim 1, characterized in that: Heat dissipation teeth (11) are arranged on the outer side wall of the housing (1).

9. A semiconductor laser with polarization according to claim 1, characterized in that: A water channel is arranged inside the housing (1).

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