A pulsed laser

Abstract

The present invention discloses a pulsed laser, comprising: a picosecond seed source module, a frequency selection module, at least one fiber amplification module and a solid-state amplification module; the picosecond seed source module is used to provide seed laser with a picosecond or sub-picosecond pulse width; the frequency selection module is arranged on one side of the picosecond seed source module for outputting the seed laser; the fiber amplification module is arranged on one side of the frequency selection module for outputting the laser; the solid-state amplification laser module is arranged on one side of the fiber amplification module for outputting the laser; by using the picosecond seed source module as the seed source of the laser and combining with the frequency selection module, the control of the laser pulse repetition frequency can be achieved, and then by using the fiber amplification module and the solid-state amplification module, the amplification of the power can be realized, so that during the process of amplifying the laser power, it can be amplified to the order of hundreds of watts or several hundreds of watts, thus expanding the application range of the laser.

Description

Technical Field

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

[0002] Laser is known as "the fastest knife, the brightest light, and the most accurate ruler", and has played an important role in various fields of social life. With the development of industrial technology, the requirements for processing accuracy are constantly increasing, and thus the requirements for the pulse quality and energy intensity of lasers are also getting higher and higher.

[0003] Different application scenarios require lasers with different advantages. For example, in some scenarios, ultrafast lasers are needed. Existing high-power ultrafast lasers apply semiconductor-pumped solid laser technology, and specific applications include slab lasers, disk lasers, etc., all of which can output pulsed lasers with a power level of kilowatts and a pulse width of sub-picoseconds.

[0004] However, for existing lasers applying semiconductor-pumped solid laser technology, although pulsed lasers with a power level of kilowatts and a pulse width of picoseconds or sub-picoseconds are achieved, the slab-shaped and disk-shaped gain media result in poor beam quality, which greatly limits the applications. In contrast, rod-shaped laser gain media are more conducive to achieving ultrafast lasers with high beam quality. Currently, there have been reports on achieving a one-kilowatt Q-switched pulse output by side-pumping an Nd:YAG rod. However, there is no report on the output of picosecond pulses at the hundred-watt level. Summary of the Invention

[0005] The main objective of the present invention is to provide a pulsed laser, aiming to solve the technical problem that the lasers in the prior art cannot achieve the output of picosecond and sub-picosecond pulsed lasers with high power and high beam quality, which limits the application range of the lasers.

[0006] To achieve the above objective, the present invention provides a pulsed laser, including: a picosecond seed source module, a frequency selection module, at least one fiber amplification module, and a solid amplification module; the picosecond seed source module is used to provide seed laser with a picosecond or sub-picosecond pulse width; the frequency selection module is arranged on one side of the picosecond seed source module that outputs the seed laser, and is used to regulate the pulse frequency of the seed laser output by the picosecond seed source module; the fiber amplification module is arranged on one side of the frequency selection module that outputs the laser, and is used to pre-amplify the power of the seed laser; the solid amplification module is arranged on one side of the fiber amplification module that outputs the laser, and is used to amplify the power of the seed laser to increase the power of the seed laser passing through the solid amplification laser module to the hundred-watt level or the several-hundred-watt level.

[0007] Furthermore, the solid amplification module includes: an end-pumped solid laser module and a side-pumped solid laser module; the end-pumped solid laser module is used to amplify the power of the laser output by the fiber amplification module to the order of hundreds of watts; the side-pumped solid laser module is used to amplify the power of the laser output by the end-pumped solid laser module to the order of hundreds of watts; the end-pumped solid laser module includes: a first pump source, a pump light coupling system, a dichroic mirror, a laser gain medium, and a spatial optical isolator arranged in sequence; the first pump source is arranged on one side of the laser output by the fiber amplification module and is used to provide pump light, and the pump light is used to provide pump for the seed laser for amplification; the pump light coupling system is arranged on one side of the pump light output by the first pump source and is used to couple the pump light to the laser gain medium; the dichroic mirror has the property of being highly transmissive to pump light and highly reflective to signal light, and is arranged on one side of the pump light output by the pump light coupling system and is used to reflect the signal light into the laser gain medium; the laser gain medium is arranged in the direction of the signal light reflected by the dichroic mirror and is also arranged in the direction of the pump light transmitted by the dichroic mirror, and is used to amplify the power of the signal light fused with the pump light to the order of hundreds of watts; the optical spatial isolator is used to prevent the return of the signal light output by the gain medium.

[0008] Furthermore, the side-pumped solid laser module includes: a signal light coupling mirror, a side-pumped laser crystal, a semiconductor laser array, and a coupling output mirror arranged in sequence; the signal light coupling mirror arranged on the side of the signal light output by the spatial optical isolator is used to couple the signal light output by the spatial optical isolator into the side-pumped laser crystal; the side-pumped laser crystal arranged on the side of the signal light output by the signal light coupling mirror; the pump semiconductor laser array arranged on the side-pumped laser crystal is used to amplify the signal light to the order of hundreds of watts; the coupling output mirror arranged on the side of the signal light output by the side-pumped laser crystal is used to output the signal light that has passed through the side-pumped laser crystal.

[0009] Furthermore, one or more of the end-pumped solid laser modules are cascaded; one or more of the side-pumped solid laser modules are cascaded.

[0010] Furthermore, the laser gain medium is a rare earth-doped yttrium vanadate or yttrium aluminum garnet crystal; the side-pumped laser crystal is a rare earth-doped yttrium aluminum garnet crystal.

[0011] Furthermore, the picosecond seed source module is a picosecond seed laser using a mode-locking technique or a gain-switching technique, and the frequency of the output seed laser is tunable or a fixed value.

[0012] Furthermore, the optical fiber amplification module includes: a second pump source disposed on one side of the frequency selection module for outputting pump light; a pump combiner, a doped optical fiber, and an optical fiber isolator sequentially disposed on one side of the second pump source. The pump combiner is configured to combine the pump light output by the pump source and the signal light provided by the seed into the doped optical fiber; the doped optical fiber is used as a gain medium to pre-amplify the signal under the action of the pump light; the optical fiber isolator is used to prevent the pre-amplified signal light from returning..

[0013] Furthermore, the pulsed laser further includes: a control module respectively connected to the picosecond seed source module, the frequency selection module, the optical fiber amplification module, and the solid-state amplification module, and configured to control the picosecond seed source module, the frequency selection module, the optical fiber amplification module, and the solid-state amplification module to implement corresponding functions.

[0014] Furthermore, the control module includes: a voltage regulator for stabilizing the voltages of the picosecond seed source module, the frequency selection module, the optical fiber amplification module, and the solid-state amplification module; a central control unit for controlling the picosecond seed source module, the frequency selection module, the optical fiber amplification module, and the solid-state amplification module to output laser light; a power supply unit for supplying power to the picosecond seed source module, the frequency selection module, the optical fiber amplification module, and the solid-state amplification module; a laser adjustment unit for adjusting the laser light output by the picosecond seed source module, the frequency selection module, the optical fiber amplification module, and the solid-state amplification module; a thermal management unit for monitoring the temperatures and output powers of the picosecond seed source module, the frequency selection module, the optical fiber amplification module, and the solid-state amplification module; and a monitoring feedback unit for feeding back the temperatures and output powers detected by the thermal management unit to a visualization unit for staff to view.

[0015] Furthermore, the frequency selection module is an acousto-optic modulator for adjusting the repetition frequency of the input seed laser to achieve tunable output of the seed laser repetition frequency.

[0016] The present invention provides a pulsed laser, and the beneficial effects are as follows: By using the picosecond seed source module as the seed source of the laser and combining with the frequency selection module, the control of the laser pulse repetition frequency can be achieved. Then, by using the optical fiber amplification module and the solid-state amplification module, the amplification of the power is realized, so that during the amplification of the laser power, it can be amplified to the order of hundreds of watts or several hundred watts, thus expanding the application range of the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the pulsed laser in the embodiment of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the fiber amplification module of the pulsed laser in the embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the end-pumped solid laser module of the pulsed laser in the embodiment of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the side-pumped solid laser module of the pulsed laser in the embodiment of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the control module of the pulsed laser in the embodiment of the present invention. Detailed implementation manners

[0023] To make the object, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0024] Please refer to Figure 1 , which is a pulsed laser, including: a picosecond seed source module 1, a frequency selection module 2, at least one fiber amplification module 3, and a solid amplification module (the solid amplification module includes an end-pumped solid laser module 4 and a side-pumped solid laser module 5); the picosecond seed source module 1 is used to provide seed laser with a picosecond or sub-picosecond pulse width; the frequency selection module 2 is arranged on one side of the picosecond seed source module 1 for outputting the seed laser, and is used to regulate the pulse frequency of the seed laser output by the picosecond seed source module 1; the fiber amplification module 3 is arranged on one side of the frequency selection module 2 for outputting the laser, and is used to pre-amplify the power of the seed laser; the solid amplification module is arranged on one side of the fiber amplification module 3 for outputting the laser, and is used to amplify the power of the seed laser to amplify the power of the seed laser passing through the solid amplification module to the order of hundreds of watts or several hundred watts.

[0025] During the operation of the pulsed laser, the picosecond seed source module 1 first generates seed laser, and then the frequency selection module 2 regulates the frequency of the seed laser. Subsequently, the fiber amplification module 3 and the solid amplification module amplify the seed laser passing through the frequency selection module 2, and finally the solid amplification module outputs laser of hundreds of watts or several hundred watts.

[0026] In this embodiment, by using the picosecond seed source module 1 as the seed source of the laser and combining with the frequency selection module 2, the control of the laser pulse repetition frequency can be achieved. Then, by using the fiber amplification module 3 and the solid-state amplification module, the amplification of the power is realized, so that during the amplification of the laser power, it can be amplified to the order of hundreds of watts or several hundred watts, thus expanding the application range of the laser.

[0027] In addition, through the modular design of each component, according to actual needs, only by adding different numbers of fiber amplification modules 3 or solid-state amplification modules, the laser power can be amplified to different degrees, so the flexibility of the output laser power of the pulsed laser provided in this embodiment is greatly enhanced.

[0028] Please refer to Figure 1 , in one embodiment, the solid-state amplification module includes: an end-pumped solid-state laser module 4 and a side-pumped solid-state laser module 5; the end-pumped solid-state laser module 4 is used to amplify the power of the laser output by the fiber amplification module 3 to the order of hundreds of watts; the side-pumped solid-state laser module 5 is used to amplify the power of the laser output by the end-pumped solid-state laser module 4 to the order of several hundred watts.

[0029] By using the end-pumped solid-state laser module 4 and the side-pumped solid-state laser module 5, the seed laser can be amplified at different levels, so that the pulsed laser outputs laser with a predetermined power according to actual needs.

[0030] Please refer to Figure 3 , in one embodiment, the end-pumped solid-state laser module 4 includes: a first pump source 41, a pump light coupling system 42, a dichroic mirror 43, a laser gain medium 44, and a spatial optical isolator 45 arranged in sequence; the first pump source 41 is arranged on one side of the laser output by the fiber amplification module 3 and is used to provide pump light, and the pump light is used to amplify the seed laser as the signal light; the pump light coupling system 42 is arranged on one side of the pump light output by the first pump source 41 and is used to couple the pump light to the laser gain medium 44; the dichroic mirror 43 has the property of being highly transmissive to pump light and highly reflective to signal light, and is arranged on one side of the pump light output by the pump light coupling system 42 and is used to reflect the signal light into the laser gain medium 44; the laser gain medium 44 is arranged in the direction of the signal light reflected by the dichroic mirror 43 and in the direction of the pump light transmitted by the dichroic mirror 43, and is used to amplify the power of the signal light fused with the pump light to the order of hundreds of watts; the optical spatial isolator is used to prevent the return of the signal light output by the gain medium.

[0031] After the seed laser passes through the fiber amplifier module 3, it enters the end-face solid laser module. During the process of entering the end-face solid laser module, the seed laser, as the signal light, is reflected by the dichroic mirror 43 into the laser gain medium 44. During this process, the first pump source 41 generates pump light, and then the pump light is coupled into the laser gain medium 44 by the pump light coupling system 42. During the process of the pump light being coupled into the laser gain medium 44, the pump light passes through the dichroic mirror 43 and enters the gain medium. In the gain medium, the pump light amplifies the signal light, so that a signal light of the order of hundreds of watts is output from the gain medium.

[0032] In this embodiment, a spatial optical isolator 45 is also used to prevent the signal light output from the gain medium from being reflected back by other media and affecting the previous system.

[0033] In this embodiment, the pump light coupling system 42 includes two convex lenses arranged in sequence.

[0034] Please refer to Figure 4 , in one embodiment, the side-pumped solid laser module 5 includes: a signal light coupling mirror 511, a side-pumped laser crystal 512, a semiconductor laser array 513, and a coupling output mirror 514 arranged in sequence; the signal light coupling mirror 511 arranged on the side of the signal light output by the optical isolator is used to couple the signal light output by the optical isolator into the side-pumped laser crystal 512; the side-pumped laser crystal 512 arranged on the side of the signal light output by the signal light coupling mirror 511; the pump semiconductor laser array 513 arranged on the side-pumped laser crystal 512 is used to amplify the signal light to the order of hundreds of watts; the coupling output mirror 514 arranged on the side of the signal light output by the side-pumped laser crystal 512 is used to output the signal light passing through the side-pumped laser crystal 512.

[0035] After the seed laser enters the end-face solid laser module and is output as the signal light, the signal light is coupled into the side-pumped laser crystal 512 by the signal light coupling lens. When the signal light is transmitted in the side-pumped laser crystal 512, the side-pumped laser crystal 512 and the pump semiconductor laser array act simultaneously to amplify the signal light. After the signal light is amplified, it is output by the side-pumped laser crystal 512, and then a laser of the order of hundreds of watts or hundreds of watts is output through the coupling output mirror 514.

[0036] In one embodiment, one or more end-pumped solid laser modules 4 are cascaded; one or more side-pumped solid laser modules 5 are cascaded. When two side-pumped solid laser modules 5 are used, the first side-pumped solid laser module 51 adjusts the focal length of the thermal lens through current to match the mode of the second side-pumped solid laser module 52 to achieve high beam quality output.

[0037] By cascading different numbers of end-pumped solid laser modules 4 or side-pumped solid laser modules 5, different numbers of fiber amplifier modules 3 or solid amplifier modules can be added according to actual requirements to amplify the laser power to different degrees. Therefore, the flexibility of the output laser power of the pulsed laser provided by this embodiment is greatly enhanced.

[0038] For example, in one embodiment, a pulsed laser composed of a picosecond seed source module 1, a frequency selection module 2, one fiber amplifier module 3, four cascaded end-pumped solid laser modules 4, and two cascaded side-pumped solid laser modules 5 has a seed laser pulse width of about 8 ps, a central wavelength of 1064 nm, and a bandwidth of 0.2446 nm. Under the action of the frequency selection module 2, the repetition frequency of the seed laser can be adjusted from 100 kHz to 4 MHz. After passing through one-stage fiber amplifier module 3, four-stage end-pumped modules, and two-stage side-pumped modules, the output power of the picosecond pulse is increased to 310 W. In the frequency range of 300 kHz to 4 MHz, the average power is greater than 200 W; at 300 kHz, the peak power can reach 86 MW, and the single-pulse energy reaches 700 μJ.

[0039] In one embodiment, the laser gain medium 44 is rare-earth doped yttrium vanadate or yttrium aluminum garnet crystal; the side-pumped laser crystal 512 is rare-earth doped yttrium aluminum garnet crystal; in this embodiment, the laser gain medium 44 is a rod-shaped solid gain medium; the side-pumped laser crystal 512 is another longer rod-shaped laser gain medium 44. Using the longer side-pumped laser crystal 512 is to provide a longer absorption path, which is more conducive to achieving high-power output of the laser.

[0040] In one embodiment, the picosecond seed source module 1 is a picosecond seed laser using mode-locking technology or gain-switching technology, and the output frequency of the seed laser is tunable or a fixed value.

[0041] Please refer to Figure 2 , in one embodiment, the fiber amplifier module 3 includes: a second pump source 31 arranged on one side of the frequency selection module 2 for providing pump light; a pump combiner 32, a doped fiber 33, and an optical fiber isolator 34 arranged in sequence on one side of the second pump source 31. The pump combiner 32 is used to combine the pump light output by the pump source and the signal light of the seed into the doped fiber 33; the doped fiber 33 serves as a gain medium and amplifies the seed light under the action of the pump light; the optical fiber isolator 34 is used to block the return light of the subsequent amplification system.

[0042] After passing through the frequency selection module 2, the seed laser enters the fiber amplification module 3. During this process, the seed laser enters the doped fiber 33. At the same time, the second pump source 31 generates pump light, which is combined by the pump combiner 32 into a beam of pump light and enters the doped fiber 33, thereby pre-amplifying the seed laser and reducing the amplified spontaneous emission (ASE) effect in the subsequent amplification process.

[0043] Please refer to Figure 1 , in one embodiment, the pulsed laser further includes: a control module 6, which is respectively connected to the picosecond seed source module 1, the frequency selection module 2, the fiber amplification module 3 and the solid amplification module, and controls the picosecond seed source module 1, the frequency selection module 2, the fiber amplification module 3 and the solid amplification module to implement corresponding functions.

[0044] In this embodiment, by using the control module 6, each module can be controlled to implement corresponding functions, so as to perform integrated drive control on the pulsed laser provided in this embodiment. Therefore, the difficulty of using the pulsed laser is reduced, and the pulsed laser is easier to operate.

[0045] Please refer to Figure 5 , in one embodiment, the control module 6 includes: a voltage regulator 61 for stabilizing the voltages of the picosecond seed source module 1, the frequency selection module 2, the fiber amplification module 3 and the solid amplification module; a central control unit 62 for controlling the picosecond seed source module 1, the frequency selection module 2, the fiber amplification module 3 and the solid amplification module to output laser; a power supply unit 63 for supplying power to the picosecond seed source module 1, the frequency selection module 2, the fiber amplification module 3 and the solid amplification module; a laser adjustment unit 64 for adjusting the laser output by the picosecond seed source module 1, the frequency selection module 2, the fiber amplification module 3 and the solid amplification module; a thermal management unit 65 for monitoring the temperatures and output powers of the picosecond seed source module 1, the frequency selection module 2, the fiber amplification module 3 and the solid amplification module; a monitoring and feedback unit 66 for feeding back the temperatures and output powers detected by the thermal management unit 65 to the visualization unit for the staff to view.

[0046] In one embodiment, the frequency selection module 2 is an acousto-optic modulator, and the adjustable range of the repetition frequency of the input seed laser is 100 kHz - 4 MHz.

[0047] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, the relevant descriptions of other embodiments can be referred to.

[0048] The above is the description of a pulsed laser provided by the present invention. For those skilled in the art, according to the idea of the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A pulsed laser, characterized in that, Comprising: A picosecond seed source module, a frequency selection module, at least one fiber amplifier module, and a solid-state amplifier module; The picosecond seed source module is used to provide seed laser with a picosecond or sub-picosecond pulse width; The frequency selection module is arranged on one side of the picosecond seed source module that outputs the seed laser, and is used to regulate the pulse frequency of the seed laser output by the picosecond seed source module; The fiber amplifier module is arranged on one side of the frequency selection module that outputs the laser, and is used to pre-amplify the power of the seed laser; The solid-state amplifier module is arranged on one side of the fiber amplifier module that outputs the laser, and is used to amplify the power of the seed laser to the order of hundreds of watts or several hundreds of watts, where the order of several hundreds of watts is any power of the seed laser greater than one hundred watts and less than one kilowatt; The solid-state amplifier module includes: An end-pumped solid-state laser module and a side-pumped solid-state laser module; The end-pumped solid-state laser module is used to amplify the power of the laser output by the fiber amplifier module to the order of hundreds of watts; The side-pumped solid-state laser module is used to amplify the power of the laser output by the end-pumped solid-state laser module to the order of several hundreds of watts; The end-pumped solid-state laser module includes: A first pump source, a pump light coupling system, a dichroic mirror, a laser gain medium, and a spatial optical isolator arranged in sequence; The first pump source is used to generate pump light, and the pump light is used to amplify the seed laser as the signal light; The pump light coupling system is arranged on one side of the first pump source that outputs the pump light, and is used to couple the pump light into the laser gain medium; The dichroic mirror has the property of being highly transmissive to pump light and highly reflective to signal light, and is arranged on one side of the pump light coupling system that outputs the pump light, and is used to reflect the signal light into the laser gain medium; The laser gain medium is arranged in the direction of the signal light reflected by the dichroic mirror and in the direction of the pump light transmitted by the dichroic mirror, and is used to amplify the power of the signal light fused with the pump light to the order of hundreds of watts; The spatial optical isolator is used to prevent the return of the signal light output by the gain medium.

2. The pulsed laser according to claim 1, wherein The side-pumped solid-state laser module includes: A signal light coupling mirror, a side-pumped laser crystal, a semiconductor laser array, and a coupling output mirror arranged in sequence; The signal light coupling mirror arranged on one side of the spatial optical isolator of the end-pumped solid-state laser module that outputs the signal light is used to couple the signal light output by the spatial optical isolator into the side-pumped laser crystal; The pump semiconductor laser array arranged on the side-pumped laser crystal is used to amplify the signal light to the order of several hundreds of watts; The coupling output mirror arranged on one side of the side-pumped laser crystal that outputs the signal light is used to output the signal light amplified by the side-pumped laser crystal.

3. The pulsed laser according to claim 2, wherein One or more of the end-pumped solid-state laser modules are cascaded; One or more of the side-pumped solid-state laser modules are cascaded.

4. The pulsed laser according to claim 2, wherein The laser gain medium is a rare-earth doped yttrium vanadate or yttrium aluminum garnet crystal; The side-pumped laser crystal is a rare-earth doped yttrium aluminum garnet crystal.

5. The pulsed laser according to claim 1, wherein The picosecond seed source module is a picosecond seed laser using a mode-locking technique or a gain-switching technique, and the frequency of the output seed laser is tunable or a fixed value.

6. The pulsed laser according to claim 1, wherein The fiber amplifier module includes: A second pump source disposed on one side of the frequency selection module for outputting pump light; A pump combiner, a doped fiber, and an optical fiber isolator sequentially disposed on one side of the second pump source; The pump combiner is used to combine the pump light output by the pump source and the signal light output by the seed source into the doped fiber; The doped fiber serves as a laser gain medium and amplifies and outputs the signal light under the action of the pump source; The optical fiber isolator is used to prevent the signal light amplified by the doped fiber from returning.

7. The pulsed laser according to claim 1, wherein The pulsed laser further includes: A control module, which is respectively connected to the picosecond seed source module, the frequency selection module, the fiber amplifier module, and the solid amplifier module, and controls the picosecond seed source module, the frequency selection module, the fiber amplifier module, and the solid amplifier module to implement corresponding functions.

8. The pulsed laser according to claim 7, wherein The control module includes: A voltage regulator for stabilizing the voltages of the picosecond seed source module, the frequency selection module, the fiber amplifier module, and the solid amplifier module; A central control unit for controlling the picosecond seed source module, the frequency selection module, the fiber amplifier module, and the solid amplifier module to output laser; A power supply unit for supplying power to the picosecond seed source module, the frequency selection module, the fiber amplifier module, and the solid amplifier module; A laser adjustment unit for adjusting the laser output by the picosecond seed source module, the frequency selection module, the fiber amplifier module, and the solid amplifier module; A thermal management unit for monitoring the temperatures and output powers of the picosecond seed source module, the frequency selection module, the fiber amplifier module, and the solid amplifier module; A monitoring feedback unit for feeding back the temperatures and output powers detected by the thermal management unit to the visualization unit for the staff to view.

9. The pulsed laser according to claim 1, wherein The frequency selection module is an acousto-optic modulator for adjusting the repetition frequency of the input seed laser to achieve tunable output of the repetition frequency of the seed laser.

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