Laser

Abstract

The invention provides a laser device, and relates to the technical field of laser devices.The laser device comprises a shell, a cover body and a light-emitting part, and a first inner cavity is defined in the shell; the cover body is arranged in the first inner cavity, and a second inner cavity is defined by the cover body and the inner wall of the shell; the cover body comprises a fixed enclosure and a movable top cover, the bottom of the fixed enclosure is connected with the shell, a movable gap is formed between the movable top cover and the inner wall of the top of the shell, and the movable top cover can vertically move relative to the top of the fixed enclosure; the light-emitting part is connected with the bottom plate of the shell and located in the second inner cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of laser devices, and in particular to a laser. Background Art

[0002] High-power semiconductor laser fiber-coupled modules play a vital role in modern industry, widely used in semiconductor processing and fiber laser applications. These modules are assembled from multiple independent laser chips (Chip on Submount) and packaged together. These COS chips are secured to the bottom of the module housing, combined with other optical components, and sealed with a metal cover to form a complete module structure.

[0003] In practical applications, the stability of the COS is a key factor in determining module coupling effectiveness. When the module is operating, the COS inside it emits light under the influence of current, generating a significant amount of heat. Some of this heat is quickly dissipated by the metal housing in direct contact with it. However, due to the poor thermal conductivity of the air inside the housing, the remaining heat cannot be effectively dissipated, gradually accumulating within the module. This heat accumulation can cause the housing to deform, which in turn causes the optical path of the COS at the bottom to distort. This phenomenon not only affects module performance but also significantly shortens its lifespan. Summary of the Invention

[0004] The object of the present invention is to provide a laser to alleviate the technical problem of short service life of existing lasers.

[0005] In a first aspect, the present invention provides a laser comprising: a housing, wherein the interior of the housing defines a first inner cavity; a cover body, the cover body being disposed within the first inner cavity and defining a second inner cavity together with the inner wall of the outer shell; the cover body comprising a fixed enclosure and a movable top cover, the bottom of the fixed enclosure being connected to the outer shell, a movable gap being defined between the movable top cover and the top inner wall of the outer shell, and the movable top cover being capable of vertical movement relative to the top of the fixed enclosure; A light emitting component is connected to the bottom plate of the housing and is located inside the second inner cavity.

[0006] Furthermore, a first stop structure is provided at the bottom of the movable top cover; A second stop structure is provided on the top of the fixed enclosure, and the second stop structure is used to stop the first stop structure when the movable top cover moves upward to the highest position relative to the fixed enclosure.

[0007] Furthermore, the first stop structure includes a first side plate connected to the movable top cover and extending downward; The first stop structure further includes a second side plate connected to the bottom of the first side plate and extending inwardly in the transverse direction; The first stop structure further includes a third side plate connected to the transverse inner end of the second side plate and extending upward, the first side plate, the second side plate and the third side plate defining a lower groove with an upward opening; The second stop structure includes a fourth side plate connected to the top of the fixed enclosure and extending laterally outward; The second stop structure further includes a fifth side plate connected to the transverse outer end of the fourth side plate and extending downward; The fixed enclosure, the fourth side plate and the fifth side plate define an upper groove with an opening facing downward; 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.

[0008] Furthermore, in the transverse direction, there is a gap between any two adjacent ones of the first side panel, the fifth side panel, the third side panel and the fixed enclosure; When the movable top cover is in a position other than the highest position, there are gaps in the vertical direction between the fifth side panel and the second side panel, and between the third side panel and the fourth side panel, so that the first side panel, the second side panel, the third side panel, the fourth side panel, the fifth side panel and the fixed enclosure define an air passage connecting the first inner cavity and the second inner cavity.

[0009] Furthermore, the movable top cover has a range of movement that enables it to rise to contact the inner top surface of the housing.

[0010] Furthermore, the top surface of the movable top cover is provided with a heat-conducting composite material structure, which expands after being heated and recovers its original shape after heat dissipation, and when the light-emitting component is not working, the heat-conducting composite material structure is spaced apart from the inner top surface of the outer shell.

[0011] Furthermore, the thermally conductive composite material structure is a flexible porous structure.

[0012] Furthermore, a guide column extending vertically is provided on the inner top surface of the shell, and guide holes are correspondingly provided on the thermal conductive composite material structure and the movable top cover; the guide column is connected in the guide hole.

[0013] Furthermore, a limiting nail cap is provided at the bottom end of the guide column and stops at the bottom of the movable top cover, and a surface of the limiting nail cap facing the light-emitting component is a curved surface convex toward one side of the light-emitting component.

[0014] Furthermore, the housing includes a bottom plate, and the light-emitting element and the fixed enclosure are both mounted on the bottom plate; The bottom plate is provided with a liquid inlet hole, a liquid outlet hole and a cooling liquid flow channel communicating with the liquid inlet hole and the liquid outlet hole.

[0015] The present invention has at least the following advantages or beneficial effects: The laser provided by the present invention includes: an outer shell, a cover body, and a light-emitting component, wherein the interior of the outer shell defines a first inner cavity; the cover body is arranged inside the first inner cavity and defines a second inner cavity together with the inner wall of the outer shell; the cover body includes a fixed enclosure and a movable top cover, the bottom of the fixed enclosure is connected to the outer shell, and there is a movable gap between the movable top cover and the top inner wall of the outer shell, and the movable top cover can move vertically relative to the top of the fixed enclosure; the light-emitting component is connected to the bottom plate of the outer shell and is located inside the second inner cavity.

[0016] When the laser is operating, the light-emitting element generates heat, and when the heat accumulates to a certain amount, the temperature of the gas in the second inner cavity rises, the gas expands, and the hot gas lifts the movable top cover upward. The movable top cover overcomes gravity and performs work. The rising process consumes energy, and the energy transferred to the outer shell is reduced, and the outer shell deformation is weakened or even eliminated. When the light-emitting element stops working and the heat in the second inner cavity is insufficient to lift the top cover, the movable top cover falls and returns to its original state. This ensures heat dissipation while keeping the outer shell shape intact, thus solving the problem of outer shell deformation under high temperature. It also improves the reliability of the laser, ensuring that the light-emitting element can operate stably and accurately, and has the advantages of a solid and reliable structure, stable performance, and stable beam emission. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a laser provided by an embodiment of the present invention before operation; Figure 2 A schematic diagram of a laser working according to an embodiment of the present invention; Figure 3 for Figure 1 A partial enlarged view of position A in the middle.

[0019] Icons: 1-shell; 2-fixed enclosure; 3-movable top cover; 61-first side panel; 62-second side panel; 63-third side panel; 71-fourth side panel; 72-fifth side panel; 8-thermal conductive composite material structure; 9-guide column; 10-limiting nail cap; 11-light-emitting part; 12-first channel; 13-second channel; 14-third channel; 15-fourth channel; 16-fifth channel; 17-first inner cavity; 18-second inner cavity; 19-upper cover. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0022] 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.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it 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 rather that it can be slightly tilted.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] like Figure 1 and Figure 2 As shown, the laser provided by the present invention includes: a housing 1 , wherein a first inner cavity 17 is defined inside the housing 1 .

[0027] The housing 1 may include a bottom plate, side plates, and an upper cover plate 19, which together form a closed first inner cavity 17. The housing 1 may be made of metal, such as copper or a metal alloy, which has a certain strength to prevent deformation due to thermal shock.

[0028] The overall thickness of the bottom plate may be greater than that of the upper cover plate 19 , and the bottom plate may 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.

[0029] The laser includes a cover body, which is arranged inside the first inner cavity 17 and defines a second inner cavity 18 with the inner wall of the housing 1 . The second inner cavity 18 is located inside the first inner cavity 17 .

[0030] The housing includes a fixed enclosure 2 and a movable top cover 3. The bottom of the fixed enclosure 2 is fixedly connected to the outer shell 1, and the two are relatively stationary. A movable gap is provided 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 enclosure 2.

[0031] 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 bottom plate of the housing 1 and are located inside the second inner cavity 18. The light-emitting elements 11 generate heat when in operation. The flow channel provided in the bottom plate can play a role in heat dissipation.

[0032] When the laser is operating, light-emitting element 11 generates heat, raising the temperature of the gas within second inner cavity 18. This heat causes the gas to expand, lifting movable cover 3 upward. As movable cover 3 overcomes gravity and performs work, the upward movement consumes energy, reducing the energy transferred to outer shell 1. This reduces or even eliminates deformation of outer shell 1. When light-emitting element 11 ceases operation and the heat within second inner cavity 18 is insufficient to lift the cover, movable cover 3 drops and returns to its original position. This ensures heat dissipation while preserving the overall shape of outer shell 1, thus resolving the problem of deformation of outer shell 1 at high temperatures.

[0033] 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 first stop structure when the movable top cover 3 moves upward to the highest position relative to the fixed enclosure 2, thereby preventing the movable top cover 3 from completely separating from the movable top cover 3 and solving the technical problem that the laser cannot be restored after cooling due to the detachment of the cover. In other words, when the movable top cover 3 moves to the highest position, it cannot continue to move, and the movable top cover 3 and the fixed enclosure 2 are 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.

[0034] Preferably, the first stop structure can also limit the second stop structure in the lateral direction.

[0035] Specifically, the movable top cover 3 is arranged horizontally, 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 opening.

[0036] The fixed enclosure 2 extends vertically upward. The second stop structure includes a fourth side panel 71 and a fifth side panel 72. The fourth side panel 71 is connected to the top of the fixed enclosure 2 and extends laterally outward. The fifth side panel 72 extends downward and is connected to the lateral outer end of the fourth side panel 71. The fixed enclosure 2, the fourth side panel 71 and the fifth side panel 72 define an upper groove with an opening facing downward. The downward projection of the fifth side panel 72 falls within the lower groove, and the upward projection of the third side panel 63 falls within the upper groove. When the movable top cover 3 rises to the highest position, the lower groove and the upper groove are hooked together to form a blockage. The fifth side panel 72 is located between the third side panel 63 and the first side panel 61. The third side panel 63 and the first side panel 61 serve to limit the fifth side panel 72 in the horizontal direction.

[0037] In the transverse direction, there is a gap between any two adjacent ones of the first side plate 61, the fifth side plate 72, the third side plate 63 and the fixed enclosure 2. When the movable top cover 3 is in a position other than the highest position (for example, when the laser is not working, Figure 1 As shown in the figure, there are gaps in the vertical direction between the fifth side panel 72 and the second side panel 62, and between the third side panel 63 and the fourth side panel 71. Therefore, the third side panel 63 and the fixed enclosure 2 form a first channel 12 extending vertically in a straight line, a second channel 13 extending horizontally is formed between the upper end of the third side panel 63 and the fourth side panel 71, a third channel 14 extending vertically is formed between the third side panel 63 and the fifth side panel 72, a fourth channel 15 is formed between the lower end of the fifth side panel 72 and the second side panel 62, and a fifth channel 16 is formed between the fifth side panel 72 and the first side panel 61. 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 airway, which 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, part of the gas can flow from the airway into the first inner cavity 17, thereby alleviating the problem of expansion and deformation of the mask body.

[0038] In one practicable manner, the movable top cover 3 has a movable range that enables it to rise to contact the inner top surface of the housing 1 .

[0039] When the movable top cover 3 rises to the highest position, the movable top cover 3 contacts the inner top surface of the outer shell 1, which improves the heat conduction efficiency. The energy in the second inner cavity 18 can be directly transferred to the outer shell 1 through the movable top cover 3, and then dissipated outward by the outer shell 1, further improving the heat dissipation efficiency.

[0040] In this embodiment, a heat-conducting composite material structure 8 is provided on the top surface of the movable top cover 3. The heat-conducting composite material structure 8 expands after being heated and returns to its original shape after heat dissipation. When the light-emitting component 11 is not working, the heat-conducting composite material structure 8 is spaced apart from the inner top surface of the outer shell 1.

[0041] The material of the heat-conducting composite material structure 8 can be a graphite sheet or a metal material wrapped with 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 movable top cover 3. After the heat-conducting composite material structure 8 is heated, it expands, and the energy is consumed during the 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. In the non-working condition, a gap is reserved between the heat-conducting composite material structure 8 and the upper cover plate 19. The gap is generally greater than the deformation amount of the upper cover plate 19, approximately 1 mm - 3 mm.

[0042] 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 up and down 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.

[0043] 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 movable top cover 3; the guide columns 9 are connected in the guide holes, so that the heat-conducting composite material structure 8 and the movable top cover 3 can only move vertically.

[0044] Specifically, at the bottom end of the guide column 9, there is a limiting nail cap 10 that stops at the bottom of the movable top cover 3. The surface of the limiting nail cap 10 facing the light-emitting component 11 is a curved surface protruding towards the light-emitting component 11. The shape of the guide column 9 is roughly "inverted T" type, and the lower limiting nail cap 10 is a curved surface cap type. The heat on 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.

[0045] There is a radial gap a between the guide column 9 and the heat-conducting composite material, which is convenient for the up and down 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 limiting nail cap 10 at the lower part of the guide column 9 is b, and a < b. And the maximum diameter size of the limiting nail cap 10 is larger than the size of the guide hole, and the limiting nail cap 10 cannot pass through the guide hole, so that the guide column 9 has a certain supporting effect on the heat-conducting composite material.

[0046] In summary, when the laser is working, the heat generated by the light-emitting component 11 needs to be discharged in time to prevent the outer shell 1 from being deformed and the light-emitting component 11 from being damaged. In this embodiment, a thicker metal base plate is connected below the light-emitting component 11, and a coolant is passed into the inner part of the base plate to increase the heat dissipation effect. When all the light-emitting components 11 are working, a large amount of heat will be generated. At this time, due to the expansion of the gas in the outer shell 1, the heat-conducting composite material structure 8 moves upward and deforms, causing the heat-conducting 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, thereby accelerating heat transfer. By deforming upward and doing work, the overall gas expansion is consumed, and the deformation of the outer shell 1 is weakened or even eliminated.

[0047] 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: A housing (1), wherein the interior of the housing (1) defines a first inner cavity (17); A cover body, the cover body being arranged inside the first inner cavity (17) and defining a second inner cavity (18) with the inner wall of the outer shell (1); the cover body comprising a fixed enclosure (2) and a movable top cover (3), the bottom of the fixed enclosure (2) being connected to the outer shell (1), a movable gap being provided between the movable top cover (3) and the top inner wall of the outer shell (1), and the movable top cover (3) being capable of vertically moving relative to the top of the fixed enclosure (2); A light-emitting component (11), the light-emitting component (11) is connected to the bottom plate of the housing (1) and is located inside the second inner cavity (18).

2. The laser according to claim 1, characterized in that A first stop structure is provided at the bottom of the movable top cover (3); A second stop structure is provided on the top of the fixed enclosure (2), and the second stop structure is used to stop the first stop structure when the movable top cover (3) moves upward to the highest position relative to the fixed enclosure (2).

3. The laser according to claim 2, characterized in that The first stop structure comprises a first side plate (61) connected to the movable top cover (3) and extending downward; The first stop structure further includes a second side plate (62) connected to the bottom of the first side plate (61) and extending inwardly in the transverse direction; The first stop structure further includes a third side plate (63) connected to the transverse inner end of the second side plate (62) and extending upward, and the first side plate (61), the second side plate (62) and the third side plate (63) define a lower groove with an opening facing upward; The second stop structure comprises a fourth side plate (71) connected to the top of the fixed enclosure (2) and extending laterally outward; The second stop structure further includes a fifth side plate (72) connected to the transverse outer end of the fourth side plate (71) and extending downward; The fixed enclosure (2), the fourth side plate (71) and the fifth side plate (72) define an upper groove with an opening facing downward; 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.

4. The laser according to claim 3, characterized in that In the transverse direction, there is a gap between any two adjacent ones of the first side plate (61), the fifth side plate (72), the third side plate (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 panel (72) and the second side panel (62), and between the third side panel (63) and the fourth side panel (71), so that the first side panel (61), the second side panel (62), the third side panel (63), the fourth side panel (71), the fifth side panel (72) and the fixed enclosure (2) define an air passage connecting the first inner cavity (17) and the second inner cavity (18).

5. The laser according to any one of claims 1 to 4, characterized in that The movable top cover (3) has a movable range that enables it to rise to contact the inner top surface of the housing (1).

6. The laser according to claim 5, characterized in that The top surface of the movable top cover (3) is provided with a heat-conducting composite material structure (8), which expands when heated and recovers its original shape after heat dissipation, and when the light-emitting element (11) is not working, the heat-conducting composite material structure (8) is spaced apart from the inner top surface of the housing (1).

7. The laser according to claim 6, characterized in that The thermally conductive composite material structure (8) is a flexible porous structure.

8. The laser according to claim 6, characterized in that A guide column (9) extending vertically is provided on the inner top surface of the housing (1), and corresponding guide holes are provided on the heat-conducting composite material structure (8) and the movable top cover (3); the guide column (9) is connected in the guide hole.

9. The laser according to claim 8, characterized in that The bottom end of the guide column (9) is provided with a limiting nail cap (10) that stops at the bottom of the movable top cover (3), and the side of the limiting nail cap (10) facing the light-emitting component (11) is a curved surface that convexes toward the side of the light-emitting component (11).

10. The laser according to claim 1, characterized in that The housing (1) comprises a base plate, and the light-emitting element (11) and the fixed enclosure (2) are both mounted on the base plate; The bottom plate is provided with a liquid inlet hole, a liquid outlet hole and a cooling liquid flow channel communicating with the liquid inlet hole and the liquid outlet hole.

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