laser

Abstract

This invention provides a laser, relating to the technical field of laser devices. The laser provided by this invention includes: a housing, a cover, and a light-emitting element. The housing defines a first inner cavity; the cover is disposed inside the first inner cavity and defines a second inner cavity with the inner wall of the housing; the cover includes a fixed enclosure and a movable top cover. The bottom of the fixed enclosure is connected to the housing, and the movable top cover has an movable gap with the top inner wall of the housing, and the movable top cover can move vertically relative to the top of the fixed enclosure; the light-emitting element is connected to the bottom plate of the housing and is located inside the second inner cavity.

Description

Technical Field

[0001] This invention relates to the field of laser device technology, and in particular to a laser. Background Technology

[0002] High-power semiconductor laser fiber coupling modules play a vital role in modern industry, widely used in semiconductor processing and fiber laser fields. This module is composed of multiple independent laser chips (COS) packaged together. These COS are fixed to the bottom of the module housing, and together with other optical path components, are finally sealed with a metal cap to form a complete module structure.

[0003] In practical applications, the stability of the COS (Coefficient of Performance) is one of the key factors determining the module's coupling effectiveness. When the module is operating, the internal COS emits light under the influence of current, generating a significant amount of heat. Some of this heat is quickly dissipated by the directly contacting metal casing, but due to the poor thermal conductivity of the air inside the casing, the remaining heat cannot dissipate effectively and gradually accumulates inside the module. This heat accumulation can cause deformation of the casing, leading to twisting of the optical path of the bottom COS. This phenomenon not only affects the module's performance but also significantly shortens its lifespan. Summary of the Invention

[0004] The purpose of this invention is to provide a laser to alleviate the technical problem of short lifespan of existing lasers.

[0005] In a first aspect, the present invention provides a laser comprising:

[0006] An outer casing, the interior of which defines a first inner cavity;

[0007] A cover is disposed inside the first inner cavity and defines a second inner cavity with the inner wall of the outer shell; the cover includes a fixed enclosure and a movable top cover, the bottom of the fixed enclosure is connected to the outer shell, the movable top cover has an movable gap with the top inner wall of the outer shell, and the movable top cover can move vertically relative to the top of the fixed enclosure;

[0008] The light-emitting element is connected to the bottom plate of the outer casing and is located inside the second inner cavity.

[0009] Furthermore, a first stop structure is provided at the bottom of the movable top cover;

[0010] The top of the fixed fence is provided with a second stop structure, which is used to stop the first stop structure when the movable top cover moves upward relative to the fixed fence to the highest position.

[0011] Furthermore, the first stop structure includes a first side plate that is connected to the movable top cover and extends downward;

[0012] The first stop structure also includes a second side plate that is connected to the bottom of the first side plate and extends laterally inward;

[0013] The first stop structure also includes a third side plate that is connected to the lateral inner end of the second side plate and extends upward, and the first side plate, the second side plate and the third side plate define a lower groove with an opening facing upward.

[0014] The second stop structure includes a fourth side plate that is connected to the top of the fixed enclosure and extends laterally outward;

[0015] The second stop structure also includes a fifth side plate that is connected to the lateral outer end of the fourth side plate and extends downward;

[0016] The fixed enclosure, the fourth side panel, and the fifth side panel define an upper groove with an opening facing downwards;

[0017] The downward projection of the fifth side plate falls within the lower groove, and the upward projection of the third side plate falls within the upper groove.

[0018] Furthermore, in the horizontal direction, there is a gap between any two adjacent parts of the first side panel, the fifth side panel, the third side panel, and the fixed fence.

[0019] When the movable top cover is in a position other than its highest position, there are vertical gaps between the fifth side plate and the second side plate, and between the third side plate and the fourth side plate, so that the first side plate, the second side plate, the third side plate, the fourth side plate, the fifth side plate, and the fixed enclosure define an air passage connecting the first inner cavity and the second inner cavity.

[0020] Furthermore, the movable top cover has a range of motion that allows it to rise to contact the inner top surface of the outer casing.

[0021] Furthermore, the top surface of the movable top cover is provided with a thermally conductive composite material structure. The thermally conductive composite material structure expands when heated and returns to its original shape after dissipating heat. When the light-emitting element is not working, the thermally conductive composite material structure is spaced apart from the inner top surface of the outer shell.

[0022] Furthermore, the thermally conductive composite material structure is a flexible porous structure.

[0023] Furthermore, a guide post extending vertically is provided on the inner top surface of the outer shell, and guide holes are provided on both the thermally conductive composite material structure and the movable top cover; the guide post is connected in the guide hole.

[0024] Furthermore, the bottom end of the guide post is provided with a limiting nail cap that stops at the bottom of the movable top cover, and the side of the limiting nail cap facing the light-emitting element is a curved surface that protrudes towards the light-emitting element.

[0025] Furthermore, the outer casing includes a base plate, and the light-emitting element and the fixed enclosure are both mounted on the base plate;

[0026] The base plate is provided with an inlet hole, an outlet hole, and a coolant flow channel connecting the inlet hole and the outlet hole.

[0027] This invention has at least the following advantages or beneficial effects:

[0028] The laser provided by the present invention includes: a housing, a cover, and a light-emitting element. The interior of the housing defines a first inner cavity. The cover is disposed inside the first inner cavity and defines a second inner cavity with the inner wall of the housing. The cover includes a fixed enclosure and a movable top cover. The bottom of the fixed enclosure is connected to the housing. The movable top cover has an movable gap with the top inner wall of the housing and is capable of vertical movement relative to the top of the fixed enclosure. The light-emitting element is connected to the bottom plate of the housing and is located inside the second inner cavity.

[0029] When the laser is working, the heat generated by the light-emitting element accumulates to a certain level, causing the gas temperature in the second inner cavity to rise and expand. The hot gas lifts the movable top cover upwards. The movable top cover does work against gravity, consuming energy during the ascent, thus reducing the energy transferred to the outer shell and weakening or even eliminating the deformation of the outer shell. When the light-emitting element stops working, if the hot gas in the second inner cavity is insufficient to support the top cover, the movable top cover falls back to its original state. This ensures heat dissipation while maintaining the overall shape of the outer shell, thereby solving the problem of shell deformation at high temperatures. It also improves the reliability of the laser, ensuring that the light-emitting element can work stably and accurately, and has the advantages of a robust and reliable structure, stable performance, and stable beam emission. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the laser before it starts working, provided in an embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the laser after it has been put into operation, provided in an embodiment of the present invention.

[0033] Figure 3 for Figure 1 A magnified view of a portion of position A in the middle.

[0034] Icons: 1-Outer shell; 2-Fixed enclosure; 3-Moving top cover; 61-First side panel; 62-Second side panel; 63-Third side panel; 71-Fourth side panel; 72-Fifth side panel; 8-Thermoconductive composite material structure; 9-Guide post; 10-Limiting nail cap; 11-Light-emitting element; 12-First channel; 13-Second channel; 14-Third channel; 15-Fourth channel; 16-Fifth channel; 17-First inner cavity; 18-Second inner cavity; 19-Top cover plate. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] like Figure 1 and Figure 2 As shown, the laser provided by the present invention includes: a housing 1, wherein the interior of the housing 1 defines a first inner cavity 17.

[0042] The outer casing 1 may include a bottom plate, side plates, and a top cover plate 19, which together form a closed first inner cavity 17. The outer casing 1 may be made of metal, such as copper or a metal alloy, and has a certain strength to prevent deformation due to thermal shock.

[0043] The overall thickness of the base plate can be greater than that of the top cover plate by 19. The base plate can be provided with a liquid inlet hole, a liquid outlet hole, and a coolant flow channel connecting the liquid inlet hole and the liquid outlet hole for heat dissipation.

[0044] The laser includes a housing disposed inside the first inner cavity 17 and defining a second inner cavity 18 with the inner wall of the outer shell 1, the second inner cavity 18 being located within the first inner cavity 17.

[0045] The enclosure includes a fixed barrier 2 and a movable top cover 3. The bottom of the fixed barrier 2 is fixedly connected to the outer shell 1, and the two are relatively stationary. There is a movable gap between the movable top cover 3 and the top inner wall of the outer shell 1, and the movable top cover 3 can move vertically relative to the top of the fixed barrier 2.

[0046] The laser includes a light-emitting element 11. A housing 1 may contain several or dozens of light-emitting elements 11. The light-emitting elements 11 are connected to the base plate of the housing 1 and located inside the second inner cavity 18. The light-emitting elements 11 generate heat when they are working. The flow channels provided in the base plate can play a heat dissipation role.

[0047] When the laser is working, the light-emitting element 11 generates heat, causing the gas temperature in the second inner cavity 18 to rise and expand. The hot gas lifts the movable top cover 3 upward. The movable top cover 3 does work against gravity, consuming energy during the ascent. This reduces the energy transferred to the outer shell 1, weakening or even eliminating the deformation of the outer shell 1. When the light-emitting element 11 stops working, and the hot gas in the second inner cavity 18 is insufficient to support the top cover, the movable top cover 3 falls back to its original state. This ensures heat dissipation while maintaining the overall shape of the outer shell 1, thus solving the problem of deformation of the outer shell 1 at high temperatures.

[0048] The bottom of the movable top cover 3 is provided with a first stop structure; the top of the fixed enclosure 2 is provided with a second stop structure. The second stop structure is used to stop the movable top cover 3 from moving upward to its highest position relative to the fixed enclosure 2, thus preventing the movable top cover 3 from completely separating from the fixed enclosure 2 and solving the technical problem that the laser cannot recover after cooling due to the detachment of the cover. In other words, when the movable top cover 3 moves to its highest position, it can no longer move, and the movable top cover 3 and the fixed enclosure 2 remain relatively stationary. After the laser cools down, the movable top cover 3 falls back to its initial position to prepare for the next heat dissipation.

[0049] Preferably, the first stop structure can also limit the second stop structure in the lateral direction.

[0050] Specifically, the movable top cover 3 is horizontally positioned, and the first stop structure includes a first side plate 61, a second side plate 62, and a third side plate 63. The first side plate 61 is connected to the movable top cover 3 and extends downward. The second side plate 62 extends laterally inward and is connected to the bottom of the first side plate 61. The third side plate 63 extends upward and is connected to the lateral inner end of the second side plate 62. The first side plate 61, the second side plate 62, and the third side plate 63 define a lower groove with an upward-facing opening.

[0051] The fixed enclosure 2 extends vertically upwards. The second stop structure includes a fourth side plate 71 and a fifth side plate 72. The fourth side plate 71 is connected to the top of the fixed enclosure 2 and extends laterally outwards. The fifth side plate 72 extends downwards and connects to the outer lateral end of the fourth side plate 71. The fixed enclosure 2, the fourth side plate 71, and the fifth side plate 72 define an upper groove with an opening facing downwards. The downward projection of the fifth side plate 72 falls within the lower groove, and the upward projection of the third side plate 63 falls within the upper groove. When the movable top cover 3 rises to its highest position, the lower groove and the upper groove hook together to form a barrier. The fifth side plate 72 is located between the third side plate 63 and the first side plate 61, and the third side plate 63 and the first side plate 61 provide a horizontal limiting effect on the fifth side plate 72.

[0052] Laterally, there is a gap between any two adjacent parts of the first side panel 61, the fifth side panel 72, the third side panel 63, and the fixed enclosure 2. When the movable top cover 3 is in a position other than its highest position (e.g., when the laser is not operating, such as...),... Figure 1 As shown), there are vertical gaps between the fifth side plate 72 and the second side plate 62, and between the third side plate 63 and the fourth side plate 71. Therefore, the third side plate 63 and the fixed enclosure 2 form a vertically extending first channel 12. The upper end of the third side plate 63 and the fourth side plate 71 form a horizontally extending second channel 13. The third side plate 63 and the fifth side plate 72 form a vertically extending third channel 14. The lower end of the fifth side plate 72 and the second side plate 62 form a fourth channel 15. The fifth side plate 72 and the first side plate 61 form a fifth channel 16. The first channel 12, the second channel 13, the third channel 14, the fourth channel 15, and the fifth channel 16 are connected in sequence to form an air passage. The air passage connects the space inside and outside the second inner cavity 18. The space outside the second inner cavity 18 refers to the space between the first inner cavity 17 and the second inner cavity 18. After the gas in the second inner cavity 18 expands, some of the gas can flow from the air passage into the first inner cavity 17, alleviating the problem of the cover expanding and deforming.

[0053] In one possible implementation, the movable top cover 3 has a range of motion that allows it to rise to contact the inner top surface of the outer casing 1.

[0054] When the movable top cover 3 rises to its highest position, it contacts the inner top surface of the outer shell 1, resulting in higher heat conduction efficiency. The energy within the second inner cavity 18 can be directly transferred to the outer shell 1 through the movable top cover 3, and then dissipated outwards by the outer shell 1. This further improves heat dissipation efficiency.

[0055] In this embodiment, the top surface of the movable top cover 3 is provided with a thermally conductive composite material structure 8. The thermally conductive composite material structure 8 expands when heated and returns to its original shape after dissipating heat. When the light-emitting element 11 is not working, the thermally conductive composite material structure 8 is spaced apart from the inner top surface of the outer shell 1.

[0056] The material of the heat-conducting composite material structure 8 can be a graphite sheet or a metal material wrapped by two-dimensional graphene, which is used for rapid heat conduction. The energy in the second inner cavity 18 can be transferred to the heat-conducting composite material structure 8 through the moving top cover 3. After the heat-conducting composite material structure 8 is heated, it expands, and the energy is consumed during deformation, reducing the energy transferred to the outer shell 1. After expansion, the heat-conducting composite material structure 8 contacts the inner top surface of the outer shell 1 to form heat conduction. When the heat-conducting composite material structure 8 expands due to heat, it can conduct the heat in the outer shell 1 to the upper cover plate 19, and can compensate for the internal and external pressure differences caused by the heat accumulation in the outer shell 1 and the internal and external pressure differences caused by the vacuum environment. When not working, a gap is reserved between the heat-conducting composite material structure 8 and the upper cover plate 19. The gap is generally larger than the deformation amount of the upper cover plate 19, approximately 1 mm - 3 mm.

[0057] The heat-conducting composite material structure 8 can be a flexible porous structure. For example, graphene aerogel, which has flexibility and high heat conductivity. The flexible porous material is light in weight. Compared with the metal porous material, the flexible porous material is lighter under the same volume, is more sensitive to thermal expansion, and is convenient for vertical movement. The flexible porous material has a larger deformation amount by itself compared with the hard contact of the metal porous material. When the heat-conducting composite material structure 8 expands due to heat and contacts the outer shell 1, its own deformation can bear part of the buffer to avoid hard contact with the outer shell 1.

[0058] On the inner top surface of the outer shell 1, there are guide columns 9 extending vertically. Corresponding guide holes are provided on both the heat-conducting composite material structure 8 and the moving top cover 3; the guide columns 9 are connected in the guide holes, so that the heat-conducting composite material structure 8 and the moving top cover 3 can only move vertically.

[0059] Specifically, at the bottom end of the guide column 9, there is a limit nail cap 10 that stops at the bottom of the moving top cover 3. The surface of the limit nail cap 10 facing the light-emitting part 11 is a curved surface protruding toward the light-emitting part 11. The shape of the guide column 9 is roughly "inverted T" type, and the lower limit nail cap 10 is a curved surface cap type. The heat of the curved surface is dispersed to prevent deformation. The material can be selected as pure copper or a graphite column, which has a certain hardness and is not easy to deform. In addition, it has good heat conductivity.

[0060] There is a radial gap a between the guide column 9 and the heat-conducting composite material, which is convenient for the vertical movement of the heat-conducting composite material. The smaller the gap, the better, to prevent heat leakage to the upper cover plate 19 and cause deformation of the upper cover plate 19. a can be set to 0.1 mm - 0.5 mm. The diameter of the limit nail cap 10 at the lower part of the guide column 9 is b, and a < b, and the maximum diameter size of the limit nail cap 10 is larger than the size of the guide hole, so that the limit nail cap 10 cannot pass through the guide hole, making the guide column 9 have a certain supporting effect on the heat-conducting composite material.

[0061] In summary, when the laser is working, the heat generated by the light-emitting element 11 needs to be dissipated in a timely manner to prevent deformation of the outer shell 1 and damage to the light-emitting element 11. In this embodiment, a thick metal base plate is connected below the light-emitting element 11, and coolant is circulated inside the base plate to increase the heat dissipation effect. When all the light-emitting elements 11 are working, a large amount of heat is generated. At this time, due to the expansion of the gas inside the outer shell 1, the thermally conductive composite material structure 8 moves upward and deforms, causing the thermally conductive composite material structure 8 to contact the upper cover plate 19, the third side plate 63 to contact the fourth side plate 71, and / or the fifth side plate 72 to contact the second side plate 62, accelerating heat transfer. Through upward deformation and movement, the work done consumes the overall gas expansion, and the deformation of the outer shell 1 is weakened or even eliminated.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser, characterized in that, include: The outer shell (1) defines a first inner cavity (17) inside the outer shell (1); The cover is disposed inside the first inner cavity (17) and defines a second inner cavity (18) with the inner wall of the outer shell (1); the cover includes a fixed enclosure (2) and a movable top cover (3), the bottom of the fixed enclosure (2) is connected to the outer shell (1), the movable top cover (3) has an movable gap between it and the top inner wall of the outer shell (1), and the movable top cover (3) can move vertically relative to the top of the fixed enclosure (2); Light-emitting element (11), which is connected to the bottom plate of the outer shell (1) and located inside the second inner cavity (18); The bottom of the movable top cover (3) is provided with a first stop structure; The top of the fixed enclosure (2) is provided with a second stop structure, which is used to stop the first stop structure when the movable top cover (3) moves upward relative to the fixed enclosure (2) to the highest position. The first stop structure includes a first side plate (61) that is connected to the movable top cover (3) and extends downward. The first stop structure also includes a second side plate (62) that is connected to the bottom of the first side plate (61) and extends laterally inward. The first stop structure also includes a third side plate (63) that is connected to the lateral inner end of the second side plate (62) and extends upward, the first side plate (61), the second side plate (62) and the third side plate (63) defining a lower groove with an opening facing upward; The second stop structure includes a fourth side plate (71) that is connected to the top of the fixed enclosure (2) and extends laterally outward. The second stop structure also includes a fifth side plate (72) that is connected to the lateral outer end of the fourth side plate (71) and extends downward. The fixed enclosure (2), the fourth side plate (71) and the fifth side plate (72) define an upper groove with an opening facing downwards; The downward projection of the fifth side plate (72) falls in the lower groove, and the upward projection of the third side plate (63) falls in the upper groove.

2. The laser according to claim 1, characterized in that, In the horizontal direction, there is a gap between any two adjacent parts of the first side panel (61), the fifth side panel (72), the third side panel (63), and the fixed enclosure (2); When the movable top cover (3) is in a position other than the highest position, there are gaps in the vertical direction between the fifth side plate (72) and the second side plate (62), and between the third side plate (63) and the fourth side plate (71), so that the first side plate (61), the second side plate (62), the third side plate (63), the fourth side plate (71), the fifth side plate (72) and the fixed enclosure (2) define an air passage connecting the first inner cavity (17) and the second inner cavity (18).

3. The laser according to any one of claims 1-2, characterized in that, The movable top cover (3) has a range of motion that allows it to rise to contact the inner top surface of the outer shell (1).

4. The laser according to claim 3, characterized in that, The top surface of the movable top cover (3) is provided with a thermally conductive composite material structure (8). The thermally conductive composite material structure (8) expands after being heated and returns to its original shape after dissipating heat. When the light-emitting element (11) is not working, the thermally conductive composite material structure (8) is spaced apart from the inner top surface of the outer shell (1).

5. The laser according to claim 4, characterized in that, The thermally conductive composite material structure (8) is a flexible porous structure.

6. The laser according to claim 4, characterized in that, The inner top surface of the outer shell (1) is provided with a guide post (9) extending vertically, and the thermally conductive composite material structure (8) and the movable top cover (3) are both provided with guide holes; the guide post (9) is connected in the guide hole.

7. The laser according to claim 6, characterized in that, The bottom end of the guide post (9) is provided with a limiting nail cap (10) that stops at the bottom of the movable top cover (3). The side of the limiting nail cap (10) facing the light-emitting element (11) is a curved surface that protrudes towards the light-emitting element (11).

8. The laser according to claim 1, characterized in that, The outer shell (1) includes a base plate, and the light-emitting element (11) and the fixed enclosure (2) are both mounted on the base plate; The base plate is provided with an inlet hole, an outlet hole, and a coolant flow channel connecting the inlet hole and the outlet hole.

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