High-power coherent beam combination solid laser system
Through the high-power coherent beam solid-state laser system, the time sequence controller and fiber coupled beam technology are used to solve the complex problems of high-power laser output and optical path alignment in solid-state laser system, and the output of high average power and high beam quality is achieved. And the stability and regularity of the system are ensured through improved mounting brackets and heat dissipation structure.
Patent Information
- Application Number
- CN202420134512.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-19
AI Technical Summary
When the existing solid-state laser system outputs high power, especially the output of green, blue and ultraviolet light, it is difficult to obtain high power, and the optical path alignment requirements are high. The equipment is complex and error-prone when combining multiple beams, which affects the fiber connection. and install.
Using a high-power coherent beam solid-state laser system, including a timing controller and multiple independent sub-lasers, fiber coupling and beam combining is achieved by coupling optical fibers, and the fiber beam combining is used to achieve high average power and high beam quality output, and through improvements The mounting bracket and heat dissipation structure ensure the regular arrangement and stable installation of the sub-laser.
Achieve high average power and high beam quality output far exceeding the spatially polarized combined beam. The number of sub-lasers is unlimited. The combined power is limited by the fiber damage threshold, ensuring the regularity of the fiber layout and the high overlap of the beam, while improving the The pulse adjustability and installation reliability of the laser beam are provided.
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Figure CN222168923U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lasers, in particular to a high-power coherent beam-combining solid laser system. Background Art
[0002] Since the oscillator, Q-switching device, and frequency doubling device of solid-state lasers are all spatial structures, the output laser is free-space light. The common method of use is to perform shaping, beam expansion, and focusing in the transmission path and then transmit it directly to the workpiece through space. Therefore, the optical path has extremely high alignment and pointing requirements, which limits the free-dimensional processing. At the same time, high-power lasers are the trend of future processing needs. It is difficult to obtain high-average-power lasers with a simple oscillator or amplifier, especially for green light, blue light, and ultraviolet light after frequency doubling. It is more difficult to obtain high power. The common way to obtain high-power lasers is beam combining. For solid-state lasers, only polarization beam combining can be used under narrow spectrum, and at most two lasers with orthogonal polarization states can be combined.
[0003] In addition, when combining multiple light beams, more lasers are needed. The more lasers there are, the more troublesome it is to install, fix and adjust them. If these lasers and optical fibers are not constrained, the entire laser system will appear to be messy, which is not conducive to the connection and installation of optical fibers and is prone to errors. Summary of the invention
[0004] The utility model aims to provide a high-power coherent beam-combining solid-state laser system in view of the problems existing in the prior art.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A high-power coherent beam-combining solid-state laser system comprises a timing controller and at least two independent sub-lasers connected to the timing controller, wherein a plurality of the sub-lasers are arranged side by side on an adjustable mounting support, and the sub-lasers are used to generate a spatial light laser beam;
[0007] A coupling optical fiber connected to the sub-laser, the coupling optical fiber is used to perform optical fiber coupling transmission on the spatial light laser beam; a plurality of the coupling optical fibers converge at a fiber combiner, the fiber combiner combines the spatial light laser beam and connects the output large-core transmission optical fiber.
[0008] The high-power coherent beam-combining solid-state laser system couples free-space light to optical fiber and then further performs optical fiber beam combining to obtain high average power and high beam quality that far exceeds that obtainable by spatial polarization beam combining. The beam combining scheme is not affected by the laser polarization state, and there is no theoretical upper limit to the number of sub-lasers. The achievable beam combining power is only limited by the optical fiber damage threshold, and the beam overlap after beam combining is relatively high. At the same time, the supporting method of several of the sub-lasers is improved so that when a large number of the sub-lasers are used at the same time, they can be adjusted in an orderly manner to ensure overall regularity and orderliness, which is conducive to the layout of optical fibers.
[0009] The timing controller can control the pulse timing of each sub-laser participating in the beam combination, and obtain a laser beam output with adjustable pulses. The timing controller includes a timing control system, which is used to synchronize the pulse timing or adjust it within a certain range.
[0010] The mounting bracket is provided to support these sub-lasers, so that they can be arranged in an orderly manner to facilitate the connection of optical fibers and provide a stable and reliable mounting platform; on the other hand, these sub-lasers can be adjusted simultaneously, such as height position, spacing position, etc.
[0011] Furthermore, the mounting support includes a support rail and a plurality of support legs arranged below the support rail, a slide plate structure is arranged below the sub-laser, the slide plate structure is mounted on the support rail and connected with a plurality of fasteners. The slide plate structure can move parallel to the support rail, so that the position of each sub-laser can be adjusted, and the slide plate structure can be locked by the fasteners.
[0012] Furthermore, the supporting foot comprises supporting arms symmetrically arranged on both sides of the supporting slide rail, a liftable supporting rod is provided below the supporting arm, and a supporting plate is provided at the bottom of the supporting rod.
[0013] Furthermore, the upper surface of the supporting slide rail is provided with scale marks arranged along the length direction.
[0014] Furthermore, the sub-laser is a solid-state laser, and has a metal bottom shell. A plurality of heat sinks are spaced apart below the metal bottom shell, and a slide plate structure is connected below the plurality of heat sinks. The heat sinks can not only support the entire sub-laser, but also serve as a heat dissipation component to directly dissipate heat from the sub-laser, and have a better heat dissipation effect.
[0015] Furthermore, the single-unit power of the sub-laser is 1-200W, the wavelength of the emitted spatial light laser beam is 266-1064nm, and the frequency is 1Hz-1MHz.
[0016] Furthermore, the large core diameter transmission optical fiber is a multimode optical fiber, and the optical fiber core diameter is 20 to 800 um.
[0017] Furthermore, a fiber support is provided near the fiber combiner, and a plurality of adjustable fiber binding clamps are provided on the fiber support.
[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: 1. The high-power coherent beam-combining solid-state laser system further performs fiber beam combining after fiber coupling of free-space light, thereby obtaining a high average power and a high beam quality that far exceeds that obtainable by spatial polarization beam combining; the beam combining scheme is not affected by the laser polarization state, and there is no theoretical upper limit to the number of the sub-lasers, and the achievable beam combining power is only limited by the fiber damage threshold; at the same time, the supporting method of a number of the sub-lasers is improved, so that when a large number of the sub-lasers are used at the same time, they can be adjusted in an orderly manner to ensure the overall orderliness, which is conducive to the layout of the optical fiber; 2. The setting of the timing controller can perform pulse timing control on each sub-laser involved in the beam combining, and a pulse-adjustable laser beam output can be obtained; 3. The setting of the mounting bracket is used, on the one hand, to support these sub-lasers so that these sub-lasers can be arranged together in an orderly and regular manner to facilitate the connection of the optical fiber, providing it with a stable and reliable installation platform; on the other hand, the positions of these sub-lasers can be adjusted at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the overall layout of a high-power coherent beam-combining solid-state laser system of the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of a mounting support in a high-power coherent beam-combining solid-state laser system of the utility model;
[0021] Figure 3 This is a schematic diagram of the arrangement structure of the sub-laser of the utility model installed on the mounting support;
[0022] Figure 4 This is a side structural diagram of the utility model sub-laser installed on the mounting support;
[0023] Figure 5 This is a schematic diagram of the structure of the optical fiber support of the utility model;
[0024] In the figure: 1. timing controller; 2. sub-laser; 3. mounting support; 301. support slide rail; 302. support arm; 303. support rod; 304. support plate; 4. coupling optical fiber; 5. optical fiber combiner; 6. large core diameter transmission optical fiber; 7. optical fiber support; 8. scale mark; 9. slide plate structure; 10. fastener; 11. heat sink; 12. optical fiber restraining clamp; 1201. restraining clamp slide; 1202. restraining structure; 1203. flexible clamping gasket. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0027] like Figure 1 As shown, a high-power coherent beam-combining solid-state laser system comprises a timing controller 1, and at least two independent sub-lasers 2 connected to the timing controller 1, wherein a plurality of the sub-lasers 2 are arranged side by side on an adjustable mounting support 3, and the sub-lasers 2 are used to generate a spatial light laser beam;
[0028] A coupling optical fiber 4 connected to the sub-laser 2 is used for fiber-coupled transmission of the spatial light laser beam; a plurality of coupling optical fibers 4 converge at a fiber combiner 5, and the fiber combiner 5 combines the spatial light laser beam and connects the output large-core transmission optical fiber 6.
[0029] The high-power coherent beam-combining solid-state laser system couples free-space light to optical fiber and then further performs optical fiber combining to obtain high average power and high beam quality that far exceeds that obtainable by spatial polarization beam combining. The beam combining scheme is not affected by the laser polarization state, and there is no theoretical upper limit to the number of sub-lasers, and the achievable beam combining power is only limited by the optical fiber damage threshold. At the same time, the supporting method of several of the sub-lasers 2 is improved so that when a large number of the sub-lasers are used at the same time, they can be adjusted in an orderly manner to ensure overall regularity and orderliness, which is conducive to the layout of optical fibers.
[0030] The timing controller 1 is configured to control the pulse timing of each sub-laser participating in the beam combination, and obtain a laser beam output with adjustable pulses. The timing controller 1 includes a timing control system, which is used to synchronize the pulse timing or adjust it within a certain range.
[0031] The mounting bracket 3 is provided to support the sub-lasers 2 so that the sub-lasers 2 can be arranged in an orderly manner for the connection of optical fibers, thereby providing a stable and reliable mounting platform; on the other hand, the sub-lasers 2 can be adjusted simultaneously, such as the height position, the spacing position, etc.
[0032] The purpose of using coherent beam combining is to increase the power and single pulse energy, and the corresponding peak power increases exponentially; using optical fiber as a transmission medium is to obtain a high-energy laser output with a stable beam for use in industrial processing. In some embodiments, the coupling optical fiber includes a quartz core, an armored sleeve, a water-cooled joint, etc., and the end of the optical fiber can be connected to a cutting head, a collimating beam expansion system, etc. for laser processing.
[0033] Further, combined with Figure 2 and Figure 3 As shown, the mounting support 3 includes a supporting rail 301 and a plurality of supporting feet arranged below the supporting rail 301 . A slide plate structure 9 is provided below the sub-laser 2 . The slide plate structure 9 is mounted on the supporting rail 301 and connected with a plurality of fasteners 10 .
[0034] The slide structure 9 can move parallel to the support rail 301, so that the position of each sub-laser 2 can be adjusted; the slide structure can be locked by the fastener 10, and the fastener 10 can be a locking screw or a rail limiter; the support foot can stably support the support rail 301, so that it is at a certain distance from the work desk.
[0035] Furthermore, the support foot includes support arms 302 symmetrically arranged on both sides of the support rail 301 , a liftable support rod 303 is provided below the support arm 302 , and a support plate 304 is provided at the bottom of the support rod 303 .
[0036] The support feet with this structure have better support stability, and the support rod 303 can be used to appropriately adjust the height. The support plate 304 can increase the support contact area. The support plate 304 can be a rubber pad, a magnetic block, or a suction cup, which can increase the adsorption capacity with the desktop.
[0037] Furthermore, the upper surface of the support rail 301 is provided with scale marks 8 arranged along the length direction, and the spacing between the plurality of sub-lasers 2 can be more conveniently and accurately controlled by setting the scale marks 8. A horizontal and vertical tool can also be provided on one side of the support rail 301 to adjust the horizontality and verticality of the support rail.
[0038] Furthermore, the sub-laser 2 is a solid laser, preferably a semiconductor-pumped green or blue (400nm-600nm) solid laser; the single-machine power of the sub-laser 2 is 1 to 200W, the wavelength of the emitted spatial light laser beam is 266 to 1064nm, and the frequency is 1Hz to 1MHz.
[0039] Further, combined with Figure 4 As shown, the sub-laser 2 has a metal bottom shell, a plurality of heat sinks 11 are arranged at intervals below the metal bottom shell, and a slide plate structure 9 is connected below the plurality of heat sinks 11 .
[0040] The heat sink 11 can not only support the entire sub-laser 2, but also serve as a heat dissipation component to directly dissipate heat for the sub-laser 2. Generally, a solid laser generates a large amount of heat during operation. In order to ensure the stable output of the laser, a heat sink needs to be provided. The above heat dissipation structure can not only enhance the overall direct heat dissipation effect, but also avoid the need to provide a fan in the laser and a large number of holes on the shell, thereby miniaturizing the laser and making it as closed as possible to prevent dust and the like from affecting its internal electronic components.
[0041] The heat sink 11 itself can perform heat exchange, and the channels between the heat sinks 11 can form a heat dissipation channel. The heat sink 11 can be arranged in the width direction or in the length direction; the slide plate structure 9 can be directly fixedly arranged under the heat sink 11.
[0042] Furthermore, the large core transmission optical fiber 6 is a multimode optical fiber with a core diameter of 20 to 800 um. Corresponding coatings can be selected for different bands, and quartz windows, collimators, etc. can be selected. Optical fiber connectors are selected according to the type of optical fiber, including QBH connectors and QD connectors, which are adapted to the corresponding optical fibers.
[0043] In some embodiments, a fiber support 7 is further provided near the fiber combiner 5. Figure 5 As shown, the optical fiber support 7 is provided with a plurality of adjustable optical fiber binding clamps 12 .
[0044] The arrangement of the fiber support 7 and the fiber binding clamp 12 arranged above it can effectively fix the optical fiber (cable) close to the fiber combiner 5, allowing it to be connected to the fiber combiner in a regular and orderly manner, avoiding that many optical fibers are concentrated together in a disorderly manner, so as to avoid entanglement and bending that may cause damage to the optical fiber. Moreover, after such an arrangement, it is easy to identify which sub-laser each optical fiber is output from.
[0045] The structure of the optical fiber support 7 is basically the same as that of the mounting support 3, at least there are certain differences in size, and also includes a support rail and a support foot, etc. The optical fiber binding clamp 12 includes a binding clamp slide 1201, which is arranged on the support rail, and an open binding structure 1202 is arranged above the binding clamp slide 1201, and a flexible clamping gasket 1203 is arranged inside, which can be used to relatively softly bind the optical fiber and other wire bundles. The binding clamp slide 1201 can also be translated to adjust the spacing and locked at any position.
[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-power coherent beam-combining solid-state laser system, characterized in that: It includes a timing controller and at least two independent sub-lasers connected to the timing controller, wherein a plurality of the sub-lasers are arranged side by side on an adjustable mounting support, and the sub-lasers are used to generate a spatial light laser beam; A coupling optical fiber connected to the sub-laser, the coupling optical fiber is used to perform optical fiber coupling transmission on the spatial light laser beam; a plurality of the coupling optical fibers converge at a fiber combiner, the fiber combiner combines the spatial light laser beam and connects the output large-core transmission optical fiber.
2. The high-power coherent beam combining solid-state laser system according to claim 1, characterized in that: The mounting support comprises a supporting slide rail and a plurality of supporting feet arranged below the supporting slide rail. A slide plate structure is arranged below the sub-laser. The slide plate structure is mounted on the supporting slide rail and is connected with a plurality of fasteners.
3. The high-power coherent beam combining solid-state laser system according to claim 2, characterized in that: The support foot comprises support arms symmetrically arranged on both sides of the support slide rail, a liftable support rod is arranged below the support arm, and a support plate is arranged at the bottom of the support rod.
4. The high-power coherent beam combining solid-state laser system according to claim 2, characterized in that: The upper surface of the supporting slide rail is provided with scale marks arranged along the length direction.
5. The high-power coherent beam combining solid-state laser system according to claim 1, characterized in that: The sub-laser is a solid laser and has a metal bottom shell. A plurality of heat sinks are arranged at intervals below the metal bottom shell, and a slide plate structure is connected below the plurality of heat sinks.
6. The high-power coherent beam combining solid-state laser system according to claim 1, characterized in that: The single-unit power of the sub-laser is 1-200W, and the wavelength of the emitted spatial light laser beam is 266-1064nm, and the frequency is 1Hz-1MHz.
7. The high-power coherent beam combining solid-state laser system according to claim 1, characterized in that: The large core diameter transmission optical fiber is a multimode optical fiber, and the optical fiber core diameter is 20 to 800 um.
8. The high-power coherent beam combining solid-state laser system according to claim 1, characterized in that: A fiber support is also provided near the fiber combiner, and a plurality of adjustable fiber binding clamps are provided on the fiber support.