Low-stress laser crystal clamping structure
By using liquid metal to fill the gap in the laser crystal clamping structure, the mechanical damage caused by pulsed laser energy fluctuations and screw fixation in the existing laser crystal heat dissipation methods is solved, achieving more stable optical performance and longer Service life.
Patent Information
- Application Number
- CN202421151139.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The existing laser crystals have uneven cooling fluid flow, causing fluctuations in pulsed laser energy, and the screw fixing method applies uneven pressure to the crystal, which may lead to mechanical damage.
A low-stress laser crystal clamping structure is designed, using the gap between the crystal base and the crystal cover to fill the liquid metal connection part, and the liquid metal is inserted into the gap through the guide hole to achieve welding positioning, avoiding the use of screw locks and ensuring uniformity. Contact and good heat dissipation.
The optical performance stability and service life of the laser crystal are improved, and the energy fluctuations and mechanical damage of pulsed lasers are avoided, and the heat dissipation effect is provided.
Smart Images
Figure CN222338767U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of deep ultraviolet lasers, in particular to a low-stress laser crystal clamping structure. Background Art
[0002] The statements in this section merely provide background technical information related to the present application and do not necessarily constitute prior art.
[0003] With the development of industrial lasers, the spectrum range of solid-state lasers is getting larger and larger, and the power of lasers is getting higher and higher. However, the heat dissipation of laser crystals restricts the power increase of solid-state lasers, limiting the further development of industrial lasers. There are two general ways to dissipate heat for laser crystals. One is to directly contact the crystal with the coolant for heat dissipation. This method is generally only suitable for side pumping due to size requirements. The other is to clamp the heat of the crystal into a heat sink. The heat sink conducts heat through contact, or liquid cooling, or uses TEC to dissipate heat. The way to clamp the crystal is mostly to fix it between different parts with screws, and fill the parts with thermal conductive materials to make the contact more complete.
[0004] In the process of implementing the present utility model, the applicant found that the existing heat dissipation method of laser crystal has at least the following problems:
[0005] 1. Use the side pump method to directly contact the crystal with the coolant for heat dissipation. This method is generally only suitable for the side pump method due to size requirements. There will be uneven coolant flow, resulting in pulse laser energy fluctuations.
[0006] 2. The existing method of clamping crystals uses screws to fix them, and the pressure applied to the crystal can only be determined indirectly by the torque value of the locking screws. On the one hand, the stress on the laser crystal will change its optical properties, such as reducing the laser roundness and beam quality. On the other hand, due to uneven pressure, as the crystal works, the temperature rises, and the interaction between compressive stress and thermal stress causes it to exceed the mechanical damage threshold of the crystal, resulting in crystal breakage.
[0007] In view of this, how to solve the above problems existing in the existing heat dissipation method of laser crystal has become the subject to be studied and solved by the present utility model. Utility Model Content
[0008] The utility model aims to provide a low-stress laser crystal clamping structure.
[0009] In order to achieve the above-mentioned purpose, the utility model proposes a low-stress laser crystal clamping structure for heat dissipation of laser crystals. The laser crystal clamping structure comprises a crystal seat and a crystal cover.
[0010] The crystal seat is provided with an assembly groove for assembling the laser crystal and the crystal cover, the left and right sides of the assembly groove are provided with grooves, and the front and rear sides of the assembly groove are open.
[0011] Both sides of the crystal cover have assembly parts for assembling into the groove of the assembly groove from the front or from the back, and the shape of the assembly parts matches the groove clearance of the assembly groove; a liquid storage tank is provided above the crystal cover, and a receiving tank for accommodating the laser crystal is provided below the crystal cover, and the liquid storage tank and the receiving tank are connected by a guide hole.
[0012] The laser crystal clamping structure is configured as follows: there is a gap between the laser crystal, the crystal seat and the crystal cover. In the assembled state, the gap is filled with a metal connecting part for connecting the three. The metal connecting part is formed by welding the crystal cover, the crystal seat and the laser crystal into position after liquid molten liquid metal enters the gap between the receiving tank and the assembly tank through the guide hole from the liquid storage tank.
[0013] The relevant contents of this utility model are explained as follows:
[0014] 1. In the above technical scheme of the utility model, in view of the problem that the side pump method will have the problem of pulse laser energy fluctuation in the existing laser crystal heat dissipation method, and the screw locking clamping method will change the stress on the laser crystal, causing changes in optical properties and mechanical damage, a low-stress laser crystal clamping structure that adopts a clamping method but does not need to use screw locking is developed and designed. The laser crystal clamping structure includes a crystal seat and a crystal cover. The shape of the assembly part between the crystal seat and the crystal cover is matched with the groove clearance of the assembly groove to realize the crystal cover being assembled into the crystal seat from the front or from the back. The crystal cover has a The connection and positioning between the liquid reservoir and the receiving tank, the crystal cover, the crystal seat and the laser crystal are not achieved by conventional screw locking. Instead, molten liquid metal enters the receiving tank through the guide hole into the gap between the assembly tank and the laser crystal to form a metal connection. The metal connection is then used to hot-melt weld the crystal cover, the crystal seat and the laser crystal without adding additional stress to the crystal. The fluidity of the molten metal is used to fully and evenly fill the gaps between the laser crystal, the crystal seat and the crystal cover, making the contact surface between the three more uniform and free of pores, so that the entire structure has a better heat dissipation effect.
[0015] 2. In the above technical solution, a welding groove is provided on the upward surface of the assembly groove, and both ends of the laser crystal are arranged across the welding groove. There is an open space between the laser crystal and the welding groove to form a gap between the laser crystal and the crystal seat, so that the downward surface of the laser crystal can be well welded and positioned with the crystal seat, making the low-stress laser crystal clamping structure more stable and firm.
[0016] 3. In the above technical solution, the opening of the receiving groove faces downward and its shape matches the laser crystal. The bottom of the crystal cover and the receiving groove are provided with a step groove. The step groove cooperates with the receiving groove and the assembly groove to form a gap between the laser crystal and the crystal cover and a gap between the crystal cover and the crystal seat. By providing the step groove and forming the corresponding gap, the liquid metal can be better filled into the gap.
[0017] 4. In the above technical solution, the laser crystal is a rectangular parallelepiped structure, the welding groove is a rectangular groove, and the length of the welding groove is smaller than the length of the laser crystal. In this way, the rectangular parallelepiped laser crystal is placed across the rectangular welding groove, and a gap is formed between the welding groove and the laser crystal to form a metal connection portion after being filled with liquid metal.
[0018] 5. In the above technical solution, the accommodating groove is a rectangular groove, and there are gaps between the accommodating groove and the laser crystal at the top and the left and right sides, so as to match the rectangular laser crystal, and at the same time, the side walls of the laser crystal are welded and positioned to the crystal seat and the crystal cover through the metal connecting part by the application of the welding groove; the length of the accommodating groove matches that of the laser crystal, and the front and rear ends of the laser crystal have a matching gap with the step groove on the accommodating groove, and the matching gap is smaller than the gap, so as to ensure that the liquid molten liquid metal will not flow from the step groove to the front and rear ends of the laser crystal in the length direction, thereby preventing the liquid metal from flowing away, that is, it can ensure that there is no direct contact with the laser crystal, and the liquid metal can also be prevented from flowing out under the action of surface tension.
[0019] 6. In the above technical solution, the gap spacing between the laser crystal, the crystal seat and the crystal cover is 0.05-0.1 mm. The size of the gap is set reasonably to allow the liquid metal to fill the gap well.
[0020] 7. In the above technical solution, the gap spacing between the laser crystal, the crystal seat and the crystal cover is 0.1 mm. This is a more preferred solution, which can further improve the filling effect of the liquid metal.
[0021] 8. In the above technical solution, the gap between the front and rear end faces of the laser crystal and the step groove on the receiving groove is 0.025 mm. This is a more preferred solution, which can further ensure that the liquid metal does not flow out without direct contact with the laser crystal.
[0022] 9. In the above technical solution, the metal connection part is made of one or more of the following metals or alloys: indium, gold-based solder, indium-based solder. Such metals or metal alloys have low melting points and good ductility at room temperature, so as to better serve as metal connection parts to tightly weld and position the laser crystal, crystal seat, and crystal cover.
[0023] 10. In the above technical solution, the laser crystal clamping structure further includes a positioning part, which is arranged between the crystal seat and the crystal cover, and is a component used to fix the relative position between the crystal cover and the crystal seat in the assembled state. In this way, after the laser crystal, the crystal seat and the crystal cover are assembled, the relative displacement of the crystal cover and the crystal seat is avoided during the process of guiding the molten liquid metal from the liquid storage tank into the gap through the guide hole.
[0024] 11. In the above technical solution, the positioning part includes a positioning hole and a positioning pin provided at the assembly part and the groove position of the assembly groove of the crystal cover, and the positioning pin is detachably installed in the positioning hole to fix the relative position between the crystal cover and the crystal seat in the assembled state, so as to achieve positioning with a simple and reliable structure.
[0025] 12. In the above technical solution, the liquid storage tank is arranged on the top of the crystal cover, and the crystal cover is provided with a plurality of guide holes connected to the containing tank along the length direction. This design allows the liquid molten metal in the liquid storage tank to be better and more evenly filled into the gap through the guide holes, thereby improving the filling effect.
[0026] 13. In the above technical solution, a frosted portion is provided on the side wall of the laser crystal for welding and positioning with the crystal seat and the crystal cover, so as to increase the welding adhesion effect.
[0027] 14. In the above technical solution, the crystal seat contacts with an external heat source to dissipate heat, or a water channel for dissipating water is provided inside the crystal seat, thereby achieving heat dissipation of the entire low-stress laser crystal clamping structure.
[0028] 15. In this utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0029] 16. In the present utility model, the terms "center", "upper", "lower", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional assembly relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application; if the manual pressure relief valve is turned upside down or placed horizontally, the corresponding orientation should also be adjusted accordingly.
[0030] 17. In the present invention, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0031] 18. In addition, the term "and / or" in this application means three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution in which both A and B are satisfied.
[0032] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:
[0033] The above-mentioned scheme of the utility model is aimed at the problem that the side pump method in the existing laser crystal heat dissipation method will have the problem of pulse laser energy fluctuation, and the screw locking clamping method will change the stress on the laser crystal, causing changes in optical properties and mechanical damage. A low-stress laser crystal clamping structure that adopts a clamping method but does not need to use screw locking is developed and designed. The laser crystal clamping structure includes a crystal seat and a crystal cover. The shape of the assembly part between the crystal seat and the crystal cover is matched with the groove clearance of the assembly groove to realize the crystal cover being assembled into the crystal seat from the front or from the back. The crystal cover has a liquid storage tank and a containing tank connected by a guide hole. The crystal cover, the crystal seat, and the laser crystal are connected to the crystal seat. The connection and positioning between the optical crystals is not achieved by conventional screw locking. Instead, the molten liquid metal relies on gravity to enter the gap between the receiving tank, the assembly tank and the laser crystal from the liquid storage tank through the guide hole to form a metal connection. The metal connection is used to hot-melt weld the crystal cover, the crystal seat and the laser crystal without adding additional stress to the crystal. The fluidity of the molten metal is used to fully and evenly fill the gap between the laser crystal, the crystal seat and the crystal cover, making the contact surface between the three more uniform and free of pores, so that the entire structure has a better heat dissipation effect, thereby making the optical performance of the laser crystal more stable and the service life longer. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1This is a three-dimensional schematic diagram of the overall structure of the low-stress laser crystal clamping structure of the embodiment of the utility model;
[0035] Figure 2 This is a front view of the overall structure of the low-stress laser crystal clamping structure of the embodiment of the utility model;
[0036] Figure 3 for Figure 2 AA section view in the figure;
[0037] Figure 4 for Figure 3 An enlarged schematic diagram of
[0038] Figure 5 This is a top view of the overall structure of the low-stress laser crystal clamping structure of the embodiment of the utility model;
[0039] Figure 6 for Figure 5 BB section view in the figure;
[0040] Figure 7 for Figure 6 An enlarged schematic diagram of
[0041] Figure 8 It is a three-dimensional schematic diagram of the assembly of the crystal cover and the laser crystal in the embodiment of the utility model;
[0042] Fig. 9 for Figure 8 An enlarged schematic diagram of
[0043] Fig.10 This is a front view of the assembly of the crystal cover and the laser crystal in the embodiment of the utility model;
[0044] Fig.11 for Fig.10 CC section view in the figure;
[0045] Fig.12 A top view of the assembly of the crystal cover and the laser crystal in the embodiment of the utility model;
[0046] Fig.13 for Fig.13 DD section view;
[0047] Fig.14 It is a three-dimensional schematic diagram of a crystal seat in an embodiment of the utility model;
[0048] Fig.15 This is a front view of the crystal seat in the embodiment of the utility model;
[0049] Fig.16 It is a three-dimensional schematic diagram of the crystal cover in the embodiment of the utility model.
[0050] The various parts of the above drawings are shown as follows:
[0051] 1 Crystal seat
[0052] 11 Mounting slot
[0053] 111 Groove Type
[0054] 12 welding slots
[0055] 2 Crystal cover
[0056] 21 Assembly Department
[0057] 22 Liquid reservoir
[0058] 23 Receptacle
[0059] 24 Diversion holes
[0060] 25 Step Slot
[0061] 3 Laser crystal
[0062] 4 Metal connection
[0063] 5 Positioning unit
[0064] 51 Positioning hole
[0065] 52 Locating pin
[0066] 80 Gap
[0067] 90 Fit clearance. DETAILED DESCRIPTION
[0068] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0069] The utility model aims to solve the problem of pulse laser energy fluctuation in the existing heat dissipation method of the laser crystal 3, that the side pump method will cause the problem that the laser crystal 3 will be subjected to stress, causing changes in optical properties and mechanical damage in the screw locking clamping method, so as to provide a low-stress laser crystal clamping structure which adopts a clamping method but does not require the use of screw locking.
[0070] Examples, such as Figures 1 to 16As shown, the embodiment of the utility model discloses a low-stress laser crystal clamping structure for heat dissipation of a laser crystal 3, wherein the laser crystal 3 clamping structure comprises a crystal seat 1 and a crystal cover 2. The crystal seat 1 is provided with an assembly groove 11 for assembling the laser crystal 3 and the crystal cover 2, and grooves 111 are arranged on the left and right sides of the assembly groove 11, and the front and rear sides of the assembly groove 11 are open. Both sides of the crystal cover 2 have an assembly portion 21 for assembling into the groove 111 of the assembly groove 11 from the front or the back, and the shape of the assembly portion 21 is clearance-matched with the groove 111 of the assembly groove 11; a liquid storage tank 22 is provided above the crystal cover 2, and a receiving tank 23 for accommodating the laser crystal 3 is provided below the crystal cover 2, and the liquid storage tank 22 and the receiving tank 23 are connected by a guide hole 24.
[0071] The laser crystal 3 clamping structure is configured as follows: there is a gap 80 between the laser crystal 3, the crystal seat 1, and the crystal cover 2. In the assembled state, the gap 80 is filled with a metal connecting part 4 for connecting the three. The metal connecting part 4 is formed by welding the crystal cover 2, the crystal seat 1, and the laser crystal 3 into position after liquid molten liquid metal enters the accommodating groove 23, the gap 80 between the assembly groove 11 and the laser crystal 3 from the liquid storage tank 22 through the guide hole 24.
[0072] Through the implementation of the embodiment of the utility model, the shape of the assembly part 21 between the crystal seat 1 and the crystal cover 2 is gap-matched with the groove type 111 of the assembly groove 11 to realize the assembly of the crystal cover 2 into the crystal seat 1 from the front or the back. The crystal cover 2 has a liquid storage tank 22 and a receiving tank 23 connected by a guide hole 24. The connection and positioning between the crystal cover 2, the crystal seat 1, and the laser crystal 3 are not connected by conventional screw locking. Instead, the liquid molten liquid metal enters the receiving tank 23 through the guide hole 24 from the liquid storage tank 22, and the gap 80 between the assembly groove 11 and the laser crystal 3 forms a metal connecting part 4. The metal connecting part 4 performs hot-melt welding between the crystal cover 2, the crystal seat 1, and the laser crystal 3, without adding additional stress to the crystal, and utilizes the fluidity of the molten metal to fully and evenly fill the gap 80 between the laser crystal 3, the crystal seat 1, and the crystal cover 2, so that the contact surface between the three is more uniform and free of pores, so that the entire structure has a better heat dissipation effect.
[0073] In an embodiment of the utility model, a welding groove 12 is provided on the upward surface of the assembly groove 11, and both ends of the laser crystal 3 are arranged across the welding groove 12. There is an open space between the laser crystal 3 and the welding groove 12 to form a gap 80 between the laser crystal 3 and the crystal seat 1, so that the downward surface of the laser crystal 3 can be well welded and positioned with the crystal seat 1, making the low-stress laser crystal clamping structure more stable and firm.
[0074] In the embodiment of the utility model, the opening of the receiving groove 23 faces downward and its shape matches the laser crystal 3. The bottom of the crystal cover 2 and the receiving groove 23 are provided with a step groove 25. The step groove 25 cooperates with the receiving groove 23 and the assembly groove 11 to form a gap 80 between the laser crystal 3 and the crystal cover 2 and a gap 80 between the crystal cover 2 and the crystal seat 1. By providing the step groove 25 and forming the corresponding gap 80, the liquid metal can be better filled into the gap 80.
[0075] In the embodiment of the utility model, the laser crystal 3 is a rectangular parallelepiped structure, the welding groove 12 is a rectangular groove, and the length of the welding groove 12 is smaller than the length of the laser crystal 3. In this way, the rectangular parallelepiped laser crystal 3 is placed across the rectangular welding groove 12, and a gap 80 is formed between the welding groove 12 and the laser crystal 3 for liquid metal to fill and form the metal connection part 4. The accommodating groove 23 is a rectangular groove, and there are gaps 80 between the accommodating groove 23 and the laser crystal 3 at the top and the left and right sides, so as to match the rectangular laser crystal 3, and at the same time, the side walls of the laser crystal 3 are welded and positioned to the crystal seat 1 and the crystal cover 2 through the metal connecting part 4 by the application of the welding groove 12; the length of the accommodating groove 23 matches the length of the laser crystal 3, and the front and rear ends of the laser crystal 3 and the step groove 25 on the accommodating groove 23 have a matching gap 90, and the matching gap 90 is smaller than the gap 80, so as to ensure that the liquid molten liquid metal will not flow from the step groove 25 to the front and rear ends of the length direction of the laser crystal 3, and prevent the liquid metal from flowing away, that is, it can ensure that there is no direct contact with the laser crystal 3, and it can also prevent the liquid metal from flowing out under the action of surface tension. The spacing of the gap 80 between the laser crystal 3, the crystal seat 1, and the crystal cover 2 is 0.05-0.1mm. The size of the gap 80 is set reasonably, so that the liquid metal can be well filled in the gap 80. Furthermore, the spacing of the gap 80 between the laser crystal 3, the crystal seat 1, and the crystal cover 2 is 0.1 mm. This is a more preferred solution, which can further improve the filling effect of the liquid metal. Furthermore, the gap between the front and rear end faces of the laser crystal 3 and the step groove 25 on the receiving groove 23 is 0.025 mm. This is a more preferred solution, which can further ensure that the liquid metal does not flow out without direct contact with the laser crystal 3.
[0076] In the embodiment of the utility model, the metal connection part 4 is made of one or more of the following metals or alloys: indium, gold-based solder, indium-based solder. Such metals or metal alloys have low melting points and good ductility at room temperature, so as to better serve as the metal connection part 4 to tightly weld and position the laser crystal 3, the crystal seat 1, and the crystal cover 2.
[0077] In the embodiment of the utility model, the clamping structure of the laser crystal 3 further includes a positioning part 5, which is arranged between the crystal seat 1 and the crystal cover 2, and is a component used to fix the relative position between the crystal cover 2 and the crystal seat 1 in the assembled state. In this way, after the laser crystal 3, the crystal seat 1, and the crystal cover 2 are assembled, the relative displacement of the crystal cover 2 and the crystal seat 1 is avoided in the process of guiding the liquid molten liquid metal from the liquid storage tank 22 into the gap 80 through the guide hole 24.
[0078] In the embodiment of the utility model, further, the positioning portion 5 includes a positioning hole 51 and a positioning pin 52 provided at the assembly portion 21 of the crystal cover 2 and the groove 111 of the assembly groove 11, and the positioning pin 52 is detachably installed in the positioning hole 51 to fix the relative position between the crystal cover 2 and the crystal seat 1 in the assembled state. In this way, positioning is achieved with a simple and reliable structure.
[0079] In the embodiment of the utility model, the liquid storage tank 22 is arranged on the top of the crystal cover 2, and a plurality of guide holes 24 connected to the containing tank 23 are opened on the crystal cover 2 along the length direction. With this design, the liquid molten metal in the liquid storage tank 22 can be better and more evenly filled into the gap 80 through the guide holes 24, thereby improving the filling effect.
[0080] In the embodiment of the utility model, a frosted portion is provided on the side wall of the laser crystal 3 for welding and positioning with the crystal seat 1 and the crystal cover 2, so as to increase the welding adhesion effect.
[0081] In an embodiment of the utility model, the crystal seat 1 is in contact with an external heat source for heat dissipation, or a water channel for heat dissipation is provided inside the crystal seat 1, thereby achieving heat dissipation of the entire low-stress laser crystal clamping structure.
[0082] Next, the present invention will be specifically described with reference to a detailed embodiment.
[0083] The laser crystal 3 clamping structure involved in the detailed embodiment of the present utility model comprises a crystal seat 1 , a crystal cover 2 , a laser crystal 3 , a metal connecting portion 4 , and a positioning portion 5 .
[0084] The crystal seat 1 is provided with an assembly groove 11 for assembling the laser crystal 3 and the crystal cover 2. The left and right sides of the assembly groove 11 are provided with grooves 111, and the front and rear sides of the assembly groove 11 are open. The upward surface of the assembly groove 11 is provided with a welding groove 12, and the welding groove 12 is a rectangular groove. There is an open space between the laser crystal 3 and the welding groove 12 to form a gap 80 between the laser crystal 3 and the crystal seat 1.
[0085] The crystal cover 2 has an assembly portion 21 on both sides for assembling into the groove 111 of the assembly groove 11 from the front or the back, and the shape of the assembly portion 21 is matched with the groove 111 of the assembly groove 11; a liquid storage tank 22 is provided above the crystal cover 2, and a receiving tank 23 for accommodating the laser crystal 3 is provided below the crystal cover 2, and the liquid storage tank 22 and the receiving tank 23 are connected by a guide hole 24. The opening of the receiving tank 23 faces downward and its shape matches the laser crystal 3. The bottom of the crystal cover 2 and the receiving tank 23 are provided with a step groove 25. The step groove 25 cooperates with the receiving tank 23 and the assembly groove 11 to form a gap 80 between the laser crystal 3 and the crystal cover 2 and a gap 80 between the crystal cover 2 and the crystal seat 1. The front and rear ends of the laser crystal 3 have a matching gap 90 with the step groove 25 on the receiving tank 23, and the matching gap 90 is smaller than the gap 80. The spacing of the gap 80 among the laser crystal 3, the crystal seat 1 and the crystal cover 2 is 0.1 mm; the gap between the front and rear end faces of the laser crystal 3 and the step groove 25 on the accommodating groove 23 is 0.025 mm.
[0086] The laser crystal 3 is a rectangular parallelepiped structure, and a frosted portion is provided on the side wall of the laser crystal 3 for welding and positioning with the crystal seat 1 and the crystal cover 2.
[0087] The metal connection portion 4 is made of indium, taking advantage of the fact that metal indium has a low melting point and good ductility at room temperature.
[0088] The positioning portion 5 includes a positioning hole 51 and a positioning pin 52 provided at the assembly portion 21 of the crystal cover 2 and the groove 111 position of the assembly groove 11. The positioning pin 52 is detachably installed in the positioning hole 51 to fix the relative position between the crystal cover 2 and the crystal seat 1 in the assembled state.
[0089] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A low-stress laser crystal clamping structure for heat dissipation of a laser crystal (3), characterized in that: The laser crystal (3) clamping structure comprises a crystal seat (1) and a crystal cover (2); The crystal seat (1) is provided with an assembly groove (11) for assembling the laser crystal (3) and the crystal cover (2), grooves (111) are arranged on the left and right sides of the assembly groove (11), and the front and rear sides of the assembly groove (11) are open; Both sides of the crystal cover (2) are provided with assembly parts (21) for being assembled into the groove (111) of the assembly groove (11) from the front or the back, and the shape of the assembly parts (21) is clearance-matched with the groove (111) of the assembly groove (11); a liquid storage tank (22) is provided above the crystal cover (2), and a receiving tank (23) for receiving the laser crystal (3) is provided below the crystal cover (2), and the liquid storage tank (22) and the receiving tank (23) are connected by a guide hole (24); The laser crystal (3) clamping structure is configured such that: a gap (80) is provided between the laser crystal (3), the crystal seat (1) and the crystal cover (2); in an assembled state, the gap (80) is filled with a metal connecting portion (4) for connecting the three; the metal connecting portion (4) is formed by welding the crystal cover (2), the crystal seat (1) and the laser crystal (3) together after liquid molten metal enters the gap (80) between the receiving groove (23), the assembly groove (11) and the laser crystal (3) from a liquid storage tank (22) through a guide hole (24).
2. The low stress laser crystal clamping structure according to claim 1, characterized in that: The upward surface of the assembly groove (11) is provided with a welding groove (12), and the two ends of the laser crystal (3) are arranged across the welding groove (12), and there is an open space between the laser crystal (3) and the welding groove (12) to form a gap (80) between the laser crystal (3) and the crystal seat (1).
3. The low stress laser crystal clamping structure according to claim 2, characterized in that: The opening of the receiving groove (23) faces downward and its shape matches the laser crystal (3); a step groove (25) is provided on the bottom of the crystal cover (2) and the receiving groove (23); the step groove (25) cooperates with the receiving groove (23) and the assembly groove (11) to form a gap (80) between the laser crystal (3) and the crystal cover (2) and a gap (80) between the crystal cover (2) and the crystal seat (1).
4. The low stress laser crystal clamping structure according to claim 3, characterized in that: The laser crystal (3) is a rectangular parallelepiped structure, the welding groove (12) is a rectangular groove, and the length of the welding groove (12) is smaller than the length of the laser crystal (3); the accommodating groove (23) is a rectangular groove, and there is a gap (80) located at the top and left and right sides between the accommodating groove (23) and the laser crystal (3); the length of the accommodating groove (23) matches that of the laser crystal (3); the front and rear ends of the laser crystal (3) and the step groove (25) on the accommodating groove (23) have a matching gap (90), and the matching gap (90) is smaller than the gap (80).
5. The low stress laser crystal clamping structure according to claim 3, characterized in that: The spacing of the gap (80) between the laser crystal (3), the crystal seat (1) and the crystal cover (2) is 0.05-0.1 mm; the gap between the front and rear end faces of the laser crystal (3) and the step groove (25) on the accommodating groove (23) is 0.025 mm.
6. The low stress laser crystal clamping structure according to claim 1, characterized in that: The metal connection part (4) is made of one or more of the following metals or alloys: indium, gold-based solder, and indium-based solder.
7. The low stress laser crystal clamping structure according to claim 1, characterized in that: The laser crystal (3) clamping structure further comprises a positioning portion (5), the positioning portion (5) being arranged between the crystal seat (1) and the crystal cover (2), the positioning portion (5) comprising a positioning hole (51) and a positioning pin (52) arranged at the position of the groove (111) of the assembly portion (21) and the assembly groove (11) of the crystal cover (2), and the positioning pin (52), the positioning pin (52) being detachably mounted in the positioning hole (51) to fix the relative position between the crystal cover (2) and the crystal seat (1) in the assembled state.
8. The low stress laser crystal clamping structure according to claim 1, characterized in that: The liquid storage tank (22) is arranged on the top of the crystal cover (2), and a plurality of guide holes (24) connected to the containing tank (23) are provided on the crystal cover (2) along the length direction.
9. The low stress laser crystal clamping structure according to claim 1, characterized in that: A frosted portion is provided on the side wall of the laser crystal (3) for welding and positioning with the crystal seat (1) and the crystal cover (2).
10. The low stress laser crystal clamping structure according to claim 1, characterized in that: The crystal seat (1) contacts an external heat source to dissipate heat, or a water channel for dissipating heat by passing water is provided inside the crystal seat (1).