A slat laser and a fixing method thereof

Abstract

The application discloses a slab laser and a fixing method thereof, and relates to the technical field of slab lasers. The slab laser comprises a laser shell, a slab assembly, a first ceramic sheet, a second ceramic sheet, a wedge-shaped block and a fastener. The laser shell has a resonant cavity which is in communication with the outside. The slab assembly is arranged in the resonant cavity. The heat generated by the operation of the slab assembly is conducted to the outside of the laser shell through the second ceramic sheet and the wedge-shaped block on one side, and is conducted to the outside through the laser shell on the other side, so that the temperature of the slab assembly is maintained at a low state. The slab laser will not be distorted due to the excessive temperature difference caused by the asymmetric heat dissipation. In addition, the structure of the slab laser is simple, the use of screw holes is reduced, and the processing cost is saved.

Description

Technical Field

[0001] This invention relates to the field of slab laser technology, specifically to a slab laser and its fixing method. Background Technology

[0002] In radio frequency (RF) lasers, the excitation source is an RF power supply. The efficiency of converting RF energy into laser energy is relatively low, around ten percent. Most of the energy is converted into heat in the discharge region. This is especially true for high-power lasers in the hundreds of watts, where the RF energy is in the kilowatts and the heat generated is also in the kilowatts. If the heat is not dissipated in time, it will lead to excessively high local temperatures, causing the slab laser to twist and deform, thus affecting the normal operation of the laser.

[0003] Secondly, to obtain higher laser power, conventional waveguide folded cavity structures can no longer meet the requirements, and slat-structured discharge cavities are needed. Conventional slat-structured lasers generally use internal water cooling or external heat dissipation with clamping on both sides. These structures are relatively complex, require a large amount of assembly work, and are relatively expensive, so they need to be improved. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a slab laser to solve the technical problems of heat dissipation causing slab laser distortion and complex assembly.

[0005] To achieve the above objectives, the present invention provides a slab laser, the slab laser comprising:

[0006] A laser housing, wherein the laser housing has a resonant cavity communicating with the outside;

[0007] A slat assembly is disposed within the resonant cavity. The slat assembly includes a positive electrode slat and a negative electrode slat stacked together. The negative electrode slat is tightly connected to the bottom of the resonant cavity. First protrusions are spaced apart on both the left and right sides of the positive electrode slat along the outer direction. Second protrusions are spaced apart on both the left and right sides of the negative electrode slat along the outer direction. The first protrusions and the second protrusions are arranged opposite to each other. The top of the first protrusion is an inclined surface.

[0008] A first ceramic sheet is disposed between the first protrusion and the second protrusion;

[0009] The second ceramic sheet is embedded in the inclined surface;

[0010] A wedge block is disposed inside the resonant cavity, one side of which is tightly attached to the second ceramic sheet, and the other side is tightly connected to the top of the resonant cavity.

[0011] Fasteners are provided on the outside of the wedge block to fix the position of the wedge block on the second ceramic sheet.

[0012] Preferably, the thermal conductivity of the second ceramic sheet is in the range of 170-320 W / mk.

[0013] Preferably, the slab laser further includes a positioning ceramic pin, which passes through the first ceramic sheet and is inserted at both ends into the first protrusion and the second protrusion, respectively.

[0014] Preferably, the inclined surface of the first protrusion is recessed with a groove in the vertical direction, and the second ceramic sheet is installed in the groove.

[0015] Preferably, a pad is provided at the bottom of the resonant cavity, and the bottom of the negative electrode strip is attached to the top of the pad.

[0016] Preferably, heat sinks are provided at both the top and bottom of the laser housing.

[0017] Preferably, the fastener includes a tightening screw that penetrates the side wall of the laser housing, with one end of the tightening screw abutting against the outside of the wedge block and the other end sealing the penetration opening in the laser housing.

[0018] Preferably, the fastener includes a tension spring, one end of which is elastically connected to the outside of the wedge block, and the other end of which is hooked to another wedge block that is opposite to the wedge block.

[0019] A method for fixing a slab laser includes the slab laser described above, wherein fasteners are operated to make wedge-shaped blocks arranged opposite each other inclined along the direction of the inclined surface, thereby maintaining the position of each structure in the resonant cavity.

[0020] The beneficial effects of the technical solution of this invention are as follows: By setting a first ceramic sheet between the first protrusion on the positive electrode strip and the second protrusion on the negative electrode strip, a discharge cavity is formed between the positive and negative electrode strips. Most of the radio frequency energy is converted into heat in the discharge cavity. Furthermore, because the second ceramic sheet is embedded in the top of the first protrusion, and a wedge-shaped block is tightly attached to the top of the second ceramic sheet, and the wedge-shaped block is attached to the inside of the laser housing, this design can achieve heat conduction. That is, the heat from the discharge cavity is transferred out of the laser housing through the first ceramic sheet and the wedge-shaped block. Simultaneously, because the bottom of the negative electrode strip resonates with the resonant... The bottom of the cavity is tightly connected to the discharge cavity, and the heat can also be transferred out from the bottom of the laser housing. This allows heat to be conducted from both the top and bottom, limiting the rise in internal temperature and keeping the temperature of the slat assembly at a low level. This makes the laser work more stably and improves performance. At the same time, the uniform and symmetrical heat dissipation from top to bottom makes the overall structure more stable when the temperature rises. It will not cause the laser to twist and deform due to excessive temperature difference caused by asymmetrical heat dissipation. Furthermore, the laser structure is simple to assemble, reducing the use of screw holes and saving processing costs. Attached Figure Description

[0021] Figure 1 This is a partial structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the heat dissipation guidance of the present invention;

[0023] Figure 3 This is a cross-sectional view of an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of another embodiment of the present invention.

[0025] The labels for the attached figures are as follows:

[0026] 1. Laser housing; 11. Resonant cavity;

[0027] 2. Slat assembly; 21. Positive electrode slat; 211. First protrusion; 22. Negative electrode slat; 221. Second protrusion;

[0028] 3. First ceramic piece; 31. Ceramic pin;

[0029] 4. Second ceramic sheet;

[0030] 5. Wedge-shaped block;

[0031] 6. Radiator;

[0032] 7. Tighten the screws;

[0033] 8. Tension spring. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0035] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0036] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0037] The embodiments of the present invention will now be described.

[0038] This invention provides a slab laser; please refer to [reference needed]. Figures 1 to 4 The slab laser includes a laser housing 1, a slab assembly 2, a first ceramic plate 3, a second ceramic plate 4, a wedge block 5, and fasteners. The laser housing 1 has a resonant cavity 11 communicating with the outside. The slab assembly 2 is disposed within the resonant cavity 11. The heat generated by the slab assembly 2 during operation is conducted to the outside of the laser housing 1 through the second ceramic plate 4 and the wedge block 5, and simultaneously conducted to the outside through the laser housing 1, thus maintaining the temperature of the slab assembly 2 at a lower level. This results in more stable laser operation and improved performance. For more details, please refer to [reference needed]. Figure 2 , Figure 2 The double arrows in the diagram indicate the direction of heat conduction.

[0039] In this embodiment, please refer to Figure 1 and Figure 2The slat assembly 2 includes a positive electrode slat 21 and a negative electrode slat 22 stacked together. The positive electrode slat 21 is above the negative electrode slat 22. The negative electrode slat 22 is tightly connected to the bottom of the resonant cavity 11. Specifically, a pad is provided at the bottom of the resonant cavity 11, and the bottom of the negative electrode slat 22 is attached to the top of the pad to conduct heat.

[0040] For further details, please refer to... Figure 1 and Figure 2 The positive electrode strip 21 has first protrusions 211 spaced apart on both sides along the outer direction, and the negative electrode strip 22 has second protrusions 221 spaced apart on both sides along the outer direction. The first protrusions 211 and the second protrusions 221 are arranged opposite to each other. A first ceramic sheet 3 is disposed between the first protrusions 211 and the second protrusions 221 to separate the positive electrode strip 21 and the negative electrode strip 22, thus forming a discharge cavity between them. When the laser is working, radio frequency energy is converted into heat in the discharge cavity, and part of the heat is transferred... The heat is conducted to the second ceramic plate 4, then to the wedge block 5, and finally dissipated through the laser housing 1 and cooled by subsequent structures. Another part of the heat is conducted to the laser housing 1 through the pad and then cooled by subsequent structures. In this embodiment, heat sinks 6 are provided at the top and bottom of the laser housing 1 to dissipate the heat of the laser housing 1. The heat sink is selected as an air-cooled heat sink or a water-cooled heat sink plate. Of course, in other embodiments, other heat dissipation structures can be set at the top and bottom of the laser housing 1, as long as the heat dissipation requirements are met.

[0041] To ensure that the first ceramic piece 3 is stably positioned between the first protrusion 211 and the second protrusion 221, the slat laser also includes a positioning ceramic pin 31. The positioning ceramic pin 31 passes through the first ceramic piece 3 and its two ends are respectively inserted into the first protrusion 211 and the second protrusion 221, thereby stabilizing the position of the first ceramic piece 3. This arrangement reduces the use of screw holes and eliminates the need for screw fixing, making the component structure simple, the slat assembly 2 easy to assemble, saving time and processing costs.

[0042] It should also be noted that, in this embodiment, please refer to... Figure 1 The first protrusion 211 and the second protrusion 221 of the positive electrode strip 21 and the negative electrode strip 22 are arranged opposite to each other, and the gap is connected to the pad cavity to balance the inductance.

[0043] For a further description of the first protrusion 211, please refer to [link / reference]. Figure 1 and Figure 2The top of the first protrusion 211 is an inclined surface, and the second ceramic sheet 4 is embedded in the inclined surface. The thermal conductivity of the second ceramic sheet 4 is in the range of 170-320W / mk, which is used to conduct heat and also to stabilize the position of the second ceramic sheet 4. In this embodiment, the second ceramic sheet 4 includes an aluminum nitride ceramic substrate.

[0044] As for the wedge block 5, it is set inside the resonant cavity 11. One side of the wedge block 5 is tightly attached to the second ceramic sheet 4, and the other side is tightly connected to the top of the resonant cavity 11. Since the top of the first protrusion 211 is an inclined surface, the second ceramic sheet 4 embedded in the inclined surface is also inclined. Therefore, the wedge block 5 is plugged between the second ceramic sheet 4 and the top of the resonant cavity 11.

[0045] In this embodiment, the inclined surface of the first protrusion 211 is recessed with a groove in the vertical direction, and the second ceramic piece 4 is installed in the groove, that is, it is embedded in the inclined surface.

[0046] In this embodiment, the fastener is set outside the wedge block 5 and is mainly used to push or pull the wedge block 5 to fix the position of the wedge block 5 on the second ceramic plate 4. At the same time, in conjunction with the inclined surface of the second ceramic plate 4, under the stress of the wedge block 5, the slat assembly 2 can be more stably set in the resonant cavity 11.

[0047] The fastener structure will be further described in this embodiment; please refer to [reference needed]. Figure 1 and Figure 3 The fastener includes a tightening screw 7, which penetrates the side wall of the laser housing 1. One end of the tightening screw 7 abuts against the outside of the wedge block 5, and the other end seals the opening through which the laser housing 1 is penetrated. Specifically, the tightening screw 7 consists of a tightening screw and a sealing plug. The end of the tightening screw is used to abut against the outside of the wedge block 5, and the sealing plug is used to seal the opening through which the laser housing 1 is penetrated.

[0048] The fastener is operated by rotating the tightening screw 7, which pushes the wedge block 5 with its end, giving the wedge block 5 a tendency to tilt along the inclined surface, thereby ensuring that the internal structure of the resonant cavity 11 is compactly connected and in a stable state.

[0049] In another embodiment, please refer to Figure 1 and Figure 4 The fastener includes a tension spring 8, one end of which is elastically connected to the outside of the wedge block 5, and the other end is hooked to another wedge block 5 that is opposite to the wedge block 5. This also gives the opposite wedge block 5 a tendency to tilt along the inclined surface, thereby maintaining the position of each structure in the resonant cavity 11.

[0050] In other embodiments, the fasteners can be other structures, as long as the structure allows the wedge blocks 5, which are arranged opposite each other, to have a direction that tends toward each other.

[0051] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A slab laser, characterized in that, The slab laser includes: A laser housing (1) has a resonant cavity (11) inside which is connected to the outside; A slat assembly (2) is disposed in the resonant cavity (11). The slat assembly (2) includes a positive electrode slat (21) and a negative electrode slat (22) stacked together. The negative electrode slat (22) is tightly connected to the bottom of the resonant cavity (11). The positive electrode slat (21) is provided with first protrusions (211) spaced apart on both sides along the outer direction. The negative electrode slat (22) is provided with second protrusions (221) spaced apart on both sides along the outer direction. The first protrusions (211) and the second protrusions (221) are arranged opposite to each other. The top of the first protrusions (211) is an inclined surface. The first ceramic sheet (3) is disposed between the first protrusion (211) and the second protrusion (221); The second ceramic piece (4) is embedded in the inclined surface; A wedge block (5) is disposed inside the resonant cavity (11). One side of the wedge block (5) is tightly attached to the second ceramic sheet (4), and the other side is tightly connected to the top of the resonant cavity (11). Fasteners are provided on the outside of the wedge block (5) to fix the position of the wedge block (5) on the second ceramic sheet (4).

2. A slab laser according to claim 1, characterized in that, The thermal conductivity of the second ceramic sheet (4) ranges from 170 to 320 W / m·K.

3. A slab laser according to claim 1, characterized in that, The slab laser also includes a positioning ceramic pin (31), which passes through the first ceramic sheet (3) and has its two ends inserted into the first protrusion (211) and the second protrusion (221) respectively.

4. A slab laser according to claim 1, characterized in that, The first protrusion (211) has a groove recessed on its inclined surface in the vertical direction, and the second ceramic piece (4) is installed in the groove.

5. A slab laser according to claim 1, characterized in that, A pad is provided at the bottom of the resonant cavity (11), and the bottom of the negative electrode strip (22) is attached to the top of the pad.

6. A slab laser according to claim 1, characterized in that, The laser housing (1) is provided with heat sinks (6) at both the top and bottom.

7. A slab laser according to any one of claims 1-6, characterized in that, The fastener includes a tightening screw (7) that penetrates the side wall of the laser housing (1). One end of the tightening screw (7) abuts against the outside of the wedge block (5), and the other end seals the penetration opening in the laser housing (1).

8. A slab laser according to any one of claims 1-6, characterized in that, The fastener includes a tension spring (8), one end of which is elastically connected to the outside of the wedge block (5), and the other end is hooked to another wedge block (5) that is opposite to the wedge block (5).

9. A method for fixing a slab laser, characterized in that, A slab laser including any one of claims 1-8, wherein by operating fasteners, wedge blocks (5) arranged opposite each other have a tendency along the inclined plane direction, thereby maintaining the position of each structure in the resonant cavity (11).

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