Laser module

Abstract

The utility model discloses a laser module, relates to the laser technical field, and the laser module comprises a housing and a laser emission structure, the housing is provided with an accommodation cavity, the upper end of the housing is at least partially open to expose the accommodation cavity, the laser emission structure is arranged in the accommodation cavity, and the laser emission structure is arranged in the accommodation cavity. Comprising an emitting part and a plurality of reflecting parts which are arranged on the side portion, in the horizontal direction, of the emitting part at intervals, the reflecting faces of the reflecting parts all face the emitting part, and the emitting part is used for generating laser to the reflecting parts. And the reflecting surface of the reflecting part is used for adjusting the emitting direction of the laser from the horizontal direction to the emitting direction from bottom to top. Thus, the laser module can emit multiple paths of laser, the number of emitted laser is increased, the overall laser power of the laser module is improved, and meanwhile the long-term reliability of the laser module is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lasers, and particularly relates to a laser module. Background Art

[0002] Mid-wave and long-wave infrared quantum cascade semiconductor lasers are widely used in the detection of special gases and the process of laser countermeasure. However, due to the small output power of a single chip, the long-distance countermeasure and detection are limited, and the overall power needs to be increased by optical means.

[0003] However, simply increasing the power requires increasing the reflection efficiency of the rear cavity surface of the semiconductor laser at the same time. And the reflection coating for long-wave infrared is a very difficult thing. The general process coating is likely to pose a hidden danger to the long-term reliability of the device, resulting in uncertainty during the operation of the device. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a laser module, aiming to solve the problem that the existing power increasing means are likely to pose a hidden danger to the long-term reliability of the device, resulting in uncertainty during the operation of the device.

[0005] To achieve the above object, the laser module proposed by the utility model includes:

[0006] A housing having an accommodation cavity, at least part of the upper end of the housing is open to expose the accommodation cavity; and,

[0007] A laser emission structure disposed in the accommodation cavity, including an emission part and a plurality of reflection parts spaced apart from each other on the side of the emission part in the horizontal direction. The reflection surfaces of the plurality of reflection parts all face the emission part. The emission part emits laser to the plurality of reflection parts, and the reflection surfaces of the reflection parts are used to adjust the emission direction of the laser from horizontal to upward.

[0008] In an embodiment, the housing includes:

[0009] A tube shell having an accommodation cavity, the upper end of the tube shell is open; and,

[0010] A cover plate covering the upper end of the tube shell. Two through holes are vertically penetrated through the cover plate, and the two through holes respectively correspond to the two reflection parts.

[0011] In an embodiment, the housing further includes two sealing parts respectively disposed in the two through holes to seal the accommodation cavity, and each sealing part is light-transmissive.

[0012] In an embodiment, the sealing part and the cover plate are adhesively connected.

[0013] In one embodiment, the reflecting surface of each of the reflecting portions is recessed in a direction away from the other reflecting portion, and the reflecting surface of each of the reflecting portions is a curved surface.

[0014] In one embodiment, the laser module further includes a heat conducting structure, which is disposed at the lower end of the emitting portion and connects the emitting portion and the bottom wall of the accommodating cavity.

[0015] In one embodiment, the heat conducting structure includes a transition heat sink and a heat conducting base stacked vertically. The heat conducting base is fixedly disposed on the bottom wall of the accommodating cavity, the upper end surface of the transition heat sink abuts against the emitting portion, and the lower end surface abuts against the heat conducting base.

[0016] In one embodiment, the transition heat sink includes:

[0017] a main body;

[0018] two metal layers, which are respectively disposed at the upper and lower ends of the main body in the vertical direction, and the two metal layers respectively abut against the emitting portion and the heat conducting base.

[0019] In one embodiment, the heat conducting structure further includes a heat transfer portion, which is disposed between the heat conducting base and the bottom wall of the accommodating cavity to transfer heat between the heat conducting base and the bottom wall of the accommodating cavity.

[0020] In one embodiment, the emitting portion and the transition heat sink are connected by welding; and / or,

[0021] the transition heat sink and the heat conducting base are connected by welding; and / or,

[0022] the heat conducting base and the housing are connected by threads.

[0023] In the technical solution of the present utility model, the emitting portion first emits multiple lasers with emission directions arranged at an angle horizontally outwards, and the multiple lasers can respectively hit the reflecting surfaces of the multiple reflecting portions. Then, the multiple lasers are respectively reflected on the reflecting surfaces of the multiple reflecting portions to adjust the multiple lasers with a horizontal emission direction to be emitted upwards from bottom to top, so that the multiple lasers can all be emitted to the outside from the open part at the upper end of the housing, enabling the laser module to emit multiple lasers, increasing the number of emitted lasers, thereby enhancing the overall laser power of the laser module. At the same time, the long-term reliability of the laser module is also ensured. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0025] Figure 1 Schematic structural diagram of an embodiment of the laser module provided by the present invention;

[0026] Figure 2 For Figure 1 Cross-sectional schematic diagram of the laser module in

[0027] Figure 3 For Figure 1 Top view schematic diagram of the laser module (cover plate not shown) in

[0028] Figure 4 For Figure 3 Top view schematic diagram of the emission part and the heat conduction structure in

[0029] Explanation of the reference numerals in the drawings:

[0030] 100, laser module; 1, housing; 11, can; 12, cover plate; 13, through hole; 14, sealing part; 2, laser emission structure; 21, emission part; 22, reflection part; 3, heat conduction structure; 31, transition heat sink; 32, heat conduction base.

[0031] The realization of the object of the present invention, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if descriptions such as "first", "second", etc. are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] The present utility model provides a laser module, aiming to solve the problem that the existing power improvement means are likely to pose potential risks to the long-term reliability of devices and cause uncertainties during device operation.

[0036] Please refer to Figures 1 to 4 , in an embodiment of the present utility model, the laser module 100 includes a housing 1 and a laser emission structure 2. The housing 1 has a receiving cavity, and at least a part of the upper end of the housing 1 is open to expose the receiving cavity. The laser emission structure 2 is disposed in the receiving cavity and includes an emission part 21 and a plurality of reflection parts 22 spaced apart from the side of the emission part 21 in the horizontal direction. The reflection surfaces of the plurality of reflection parts 22 are all oriented towards the emission part 21. The emission part 21 emits laser towards the plurality of reflection parts 22, and the reflection surfaces of the reflection parts 22 are used to adjust the emission direction of the laser from the horizontal direction to the upward direction.

[0037] In the technical solution of the present utility model, the emission part 21 first emits multiple beams of laser with emission directions at an angle in the horizontal direction, and the multiple beams of laser can respectively hit the reflection surfaces of the plurality of reflection parts 22. Then, the multiple beams of laser are respectively reflected on the reflection surfaces of the plurality of reflection parts 22 to adjust the multiple beams of laser with a horizontal emission direction to the upward direction, so that the multiple beams of laser can all be emitted from the open part at the upper end of the housing 1 to the outside, enabling the laser module 100 to emit multiple beams of laser, increasing the number of emitted laser beams, thereby improving the overall laser power of the laser module 100. At the same time, the long-term reliability of the laser module 100 is also ensured.

[0038] Certainly, for the laser module 100 proposed by the present utility model, due to its simple optical path, the laser module 100 can also achieve the effects of small volume and convenient assembly.

[0039] It can be understood that the present utility model does not limit the specific number and specific position of the reflection part 22. For example, in an embodiment of the present utility model, two reflection parts 22 are provided, and the two reflection parts 22 are respectively arranged on the opposite sides of the emission part 21 in the horizontal direction, and the reflection surfaces of the two reflection parts 22 are both arranged towards the emission part 21. In this way, the emission part 21 emits two lasers with opposite emission directions along the horizontal direction corresponding to the two reflection parts 22, and the two lasers can be shot onto the corresponding reflection parts 22 for reflection, so as to be shot to the outside from the open part at the upper end of the housing 1.

[0040] In another embodiment of the present utility model, four emission parts 21 can also be provided. The four reflection parts 22 are respectively arranged around the emission part 21 in the horizontal direction, and the reflection surfaces of the four reflection parts 22 are both arranged towards the emission part 21. In this way, the emission part 21 emits four lasers with an included angle in the emission directions along the horizontal direction corresponding to the four reflection parts 22, and the four lasers can be shot onto the corresponding reflection parts 22 for reflection, so as to be shot to the outside from the open part at the upper end of the housing 1 together.

[0041] Of course, in other embodiments of the present utility model, the reflection part 22 can also be set to other numbers, and in actual setting, it can be selected according to requirements, and the present utility model does not limit this.

[0042] Specifically, in the present utility model, two reflection parts 22 are provided.

[0043] It should be noted that the present utility model does not limit the specific positions of the two reflection parts 22. For example, in another embodiment of the present utility model, the two reflection parts 22 can also be arranged on the adjacent sides of the emission part 21 in the horizontal direction. In this way, an included angle is formed between the two lasers emitted by the emission part 21.

[0044] In yet another embodiment of the present utility model, the two reflection parts 22 can also be arranged at intervals on the same side of the emission part 21 in the horizontal direction, as long as it is ensured that there is no other blocking object between any one of the reflection parts 22 and the emission part 21.

[0045] Correspondingly, it can be understood that the open part at the upper end of the housing 1 always corresponds to the two reflection parts 22, so as to ensure that after the emission directions of the lasers are adjusted from bottom to top by the two reflection parts 22, the lasers can smoothly shoot from the accommodation cavity to the outside, thereby ensuring the normal use of the laser module 100.

[0046] Specifically, in the present utility model, the two reflection parts 22 are respectively arranged on the opposite sides of the emission part 21 in the horizontal direction.

[0047] It should also be noted that, in order to further improve the quality of the laser emitted by the laser module 100 and avoid laser divergence, in an embodiment of the present invention, the reflection surfaces of the respective reflection portions 22 are recessed in a direction away from the other reflection portion 22, and the reflection surfaces of the respective reflection portions 22 are curved surfaces. With such a setting, when the laser irradiates the reflection surface of the reflection portion 22 for reflection, the reflection surface of the reflection portion 22 can also collimate the laser to further improve the quality of the laser emitted by the laser module 100.

[0048] In addition, the present invention does not limit the connection form between the reflection portion 22 and the housing 1. In an embodiment of the present invention, the reflection portion 22 and the movable bottom wall of the accommodating cavity are adhesively connected.

[0049] Furthermore, in order to ensure that the laser emitted by the emitting portion 21 can exit from the accommodating cavity, in an embodiment of the present invention, the housing 1 includes a tube shell 11. The tube shell 11 has an accommodating cavity, and the upper end of the tube shell 11 is open. With such a setting, after the reflection portion 22 adjusts the laser emitted by the emitting portion 21 from horizontal to upward, the adjusted laser can smoothly exit from the upper end of the tube shell 11.

[0050] In another embodiment of the present invention, the housing 1 further includes a cover plate 12. The cover plate 12 covers the upper end of the tube shell 11. The cover plate 12 is provided with two through holes 13 extending in the up and down direction. The two through holes 13 are respectively arranged corresponding to the two reflection portions 22. With such a setting, the cover plate 12 can provide protection for the emitting portion 21 and the reflection portion 22 arranged in the accommodating cavity, improving the long-term reliability of the laser module 100. At the same time, the laser reflected by the reflection portion 22 can exit from the through holes 13 to prevent affecting the laser emission of the laser module 100.

[0051] Further, to prevent dust or debris from entering the accommodation cavity through the through holes 13 and affecting the normal operation of the laser module 100, in another embodiment of the present utility model, the housing 1 further includes two sealing portions 14, and the two sealing portions 14 are respectively disposed in the two through holes 13 to seal the accommodation cavity, and each sealing portion 14 is configured to be light-transmissive. With this arrangement, the laser emitted by the emitting portion 21 will first hit the reflecting portion 22 for reflection, and the laser reflected by the reflecting portion 22 will irradiate on the sealing portion 14. Since the sealing portion 14 is light-transmissive, the laser will pass through the sealing portion 14 and then shoot to the outside. The setting of the sealing portion 14 can seal the accommodation cavity without affecting the normal operation of the laser module 100, so as to seal the emitting portion 21 and the reflecting portion 22 in the accommodation cavity, and reduce the influence of active gases such as water vapor and oxygen on the service life of the emitting portion 21 and the reflecting portion 22.

[0052] Moreover, the through holes 13 can also provide support for later optical shaping devices.

[0053] It can be understood that, to ensure the sealing performance of the sealing portion 14 for the accommodation cavity, the present utility model does not limit the connection form between the sealing portion 14 and the cover plate 12. For example, in one embodiment of the present utility model, the sealing portion 14 and the cover plate 12 are connected by bonding to ensure the sealing of the accommodation cavity by the sealing portion 14; in another embodiment of the present utility model, the peripheral side wall of the sealing portion 14 and the hole wall of the through hole 13 are in tight fit, and thus, the sealing of the accommodation cavity by the sealing portion 14 can also be ensured.

[0054] In other embodiments of the present utility model, the sealing portion 14 and the cover plate 12 can also be connected by welding or other connection forms, as long as it is ensured that the sealing portion 14 can seal the accommodation cavity, and in actual setting, it can be selected according to requirements.

[0055] In addition, the present utility model does not limit the specific material of the sealing portion 14. In one embodiment of the present utility model, the material of the sealing portion 14 can be set as glass; in another embodiment of the present utility model, the material of the sealing portion 14 can also be set as a plastic lens.

[0056] Certainly, in other embodiments of the present utility model, the material of the sealing portion 14 can also be set as other materials, as long as it is ensured that the sealing portion 14 can have good light transmittance, and in actual setting, it can be selected according to requirements.

[0057] It should also be noted that since the emitting part 21 generates a large amount of heat during the process of emitting laser light, if the heat generated by the emitting part 21 cannot be removed in time, the emitting part 21 is easily damaged. Therefore, in one embodiment of the utility model, the laser module 100 further includes a heat-conducting structure 3, which is arranged at the lower end of the emitting part 21 and connects the emitting part 21 and the bottom wall of the accommodating cavity. With such arrangement, when the emitting part 21 generates a large amount of heat, the heat generated by the emitting part 21 will be transferred to the heat-conducting structure 3, and then transferred from the heat-conducting structure 3 to the housing 1, thereby completing the heat dissipation of the emitting part 21.

[0058] It is understandable that the present invention does not limit the specific form of the heat-conducting structure 3. For example, in one embodiment of the present invention, the heat-conducting structure 3 includes a transition heat sink 31 and a heat-conducting base 32 stacked up and down. The heat-conducting base 32 is fixedly arranged on the bottom wall of the accommodating cavity. The upper end surface of the transition heat sink 31 abuts against the emitting part 21, and the lower end surface abuts against the heat-conducting base 32. In this arrangement, the heat generated by the emitting part 21 is first transferred to the transition heat sink 31, and then transferred from the transition heat sink 31 to the heat-conducting base 32. Since the heat-conducting base 32 is fixedly arranged on the bottom wall of the accommodating cavity, the heat can be transferred from the heat-conducting base 32 to the housing 1, thereby completing the heat dissipation of the emitting part 21.

[0059] Of course, the present invention does not limit the connection method between the transmitting part 21 and the transition heat sink 31. In one embodiment of the present invention, the transmitting part 21 and the transition heat sink 31 are glued together; and in another embodiment of the present invention, the transmitting part 21 and the transition heat sink 31 are welded together.

[0060] Specifically, in order to ensure the heat transfer efficiency between the emitting portion 21 and the transition heat sink 31 , in a specific embodiment of the present utility model, the emitting portion 21 and the transition heat sink 31 are welded and connected.

[0061] Similarly, the present invention does not limit the connection method between the transition heat sink 31 and the thermally conductive base 32. In one embodiment of the present invention, the transition heat sink 31 and the thermally conductive base 32 are glued together; and in another embodiment of the present invention, the transition heat sink 31 and the thermally conductive base 32 can also be set to be welded.

[0062] Of course, in order to ensure the heat transfer efficiency between the transition heat sink 31 and the thermally conductive base 32 , in a specific embodiment of the present invention, the transition heat sink 31 and the thermally conductive base 32 are welded together.

[0063] It should be noted that the present utility model does not limit the specific material of the transition heat sink 31. In an embodiment of the present utility model, the material of the transition heat sink 31 can be set as diamond; while in other embodiments of the present utility model, the material of the transition heat sink 31 can also be set as other materials with high thermal conductivity. During actual setting, it can be selected according to requirements.

[0064] In a specific embodiment of the present utility model, the material of the transition heat sink 31 is set as diamond. Thus, the thermal conductivity coefficient of the transition heat sink 31 is greater than 1800 W / m·k. And in this embodiment, the thickness of the transition heat sink 31 is 0.3 mm, the length is 8 mm, and the width is 3 mm.

[0065] Furthermore, in another embodiment of the utility model, the transition heat sink 31 includes a main body and two metal layers. The two metal layers are respectively arranged at the upper and lower ends of the main body in the vertical direction, and the two metal layers respectively abut against the emitting part 21 and the heat conducting base 32. The setting of the metal layers can further improve the heat conduction efficiency of the transition heat sink 31, thereby further increasing the heat dissipation rate of the emitting part 21.

[0066] It can be understood that the present utility model also does not limit the specific structure of the metal layer. In an embodiment of the present utility model, the metal layer can be set as a three-layer structure of Ti-Pt-Au arranged from top to bottom. Specifically, in this embodiment, the thicknesses of the three layers of Ti-Pt-Au are respectively set as 200 nm, 200 nm, and 600 nm.

[0067] Even further, to further ensure the heat transfer effect between the heat conducting base 32 and the housing 1, in the present utility model, the heat conducting structure 3 further includes a heat transfer part. The heat transfer part is arranged between the heat conducting base 32 and the bottom wall of the accommodating cavity to transfer heat between the heat conducting base 32 and the bottom wall of the accommodating cavity. The setting of the heat transfer part can increase the effective heat transfer area between the heat conducting base 32 and the bottom wall of the accommodating cavity, thereby further improving the heat transfer effect between the heat conducting base 32 and the housing 1.

[0068] It should be noted that the present utility model does not limit the specific structural form of the heat transfer part. In an embodiment of the present utility model, the heat transfer part includes thermal grease, and the thermal grease is filled between the heat conducting base 32 and the bottom wall of the accommodating cavity.

[0069] While in another embodiment of the present utility model, the heat transfer part further includes silver foil. Thus, it can also increase the effective heat transfer area between the heat conducting base 32 and the bottom wall of the accommodating cavity, thereby further improving the heat transfer effect between the heat conducting base 32 and the housing 1.

[0070] Certainly, in other embodiments of the present utility model, the heat transfer part can also be set as indium foil, silver glue or other high thermal conductivity materials. During actual setting, selection can be made according to requirements, and the present utility model does not limit this.

[0071] It can be understood that, to avoid interference of the heat conduction base 32 with the installation of the heat transfer part, in an embodiment of the present utility model, the heat conduction base 32 and the housing 1 are in threaded connection. Threaded holes are correspondingly formed on the heat conduction base 32 and the housing 1, and the laser module 100 structure further includes a threaded connector. In this way, the threaded connector sequentially passes through the threaded holes of the heat conduction base 32 and the threaded holes of the housing 1 to connect the heat conduction base 32 and the housing 1.

[0072] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A laser module, characterized in that: include: A shell having a receiving cavity, wherein the upper end of the shell is at least partially open to expose the receiving cavity; and The laser emitting structure is arranged in the accommodating cavity, including an emitting part and a plurality of reflecting parts which are spaced apart on the horizontal side of the emitting part, and the reflecting surfaces of the plurality of reflecting parts are all arranged toward the emitting part. The emitting part is used to emit laser to the plurality of reflecting parts, and the reflecting surfaces of the reflecting parts are used to adjust the emission direction of the laser from the horizontal direction to the bottom-up direction.

2. The laser module according to claim 1, characterized in that: The housing comprises: A tube shell has a containing cavity, and the upper end of the tube shell is open; and The cover plate is arranged on the upper end of the tube shell, and the cover plate is provided with two through holes in the up-down direction, and the two through holes are respectively arranged corresponding to the two reflecting parts.

3. The laser module according to claim 2, characterized in that: The shell further comprises two sealing parts, which are respectively arranged in the two through holes to seal the accommodating cavity, and each of the sealing parts is light-transmissive.

4. The laser module according to claim 3, characterized in that: The sealing portion and the cover plate are bonded and connected.

5. The laser module according to claim 1, characterized in that: The reflecting surface of each reflecting part is concavely arranged in a direction away from another reflecting part, and the reflecting surface of each reflecting part is arranged in a curved surface.

6. The laser module according to claim 1, characterized in that: The laser module further includes a heat-conducting structure, which is disposed at the lower end of the emitting portion and connects the emitting portion and the bottom wall of the accommodating cavity.

7. The laser module according to claim 6, characterized in that: The heat conduction structure includes a transition heat sink and a heat conduction base stacked up and down, the heat conduction base is fixed on the bottom wall of the accommodating cavity, the upper end surface of the transition heat sink abuts the emitting part, and the lower end surface abuts the heat conduction base.

8. The laser module according to claim 7, characterized in that: The transition heat sink comprises: main body; Two metal layers are disposed at two ends of the main body in an upper and lower direction, and the two metal layers abut against the emitting part and the heat-conducting base respectively.

9. The laser module according to claim 7, characterized in that: The heat-conducting structure further includes a heat-transfer portion, which is disposed between the heat-conducting base and the bottom wall of the accommodating cavity to transfer heat between the heat-conducting base and the bottom wall of the accommodating cavity.

10. The laser module according to claim 7, characterized in that: The emitting portion and the transition heat sink are connected by welding; and / or, The transition heat sink and the thermally conductive base are welded and connected; and / or, The heat-conducting base is threadedly connected to the shell.

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