CN113224627A - Pulse type solid laser - Google Patents
Pulse type solid laser Download PDFInfo
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- CN113224627A CN113224627A CN202110782089.1A CN202110782089A CN113224627A CN 113224627 A CN113224627 A CN 113224627A CN 202110782089 A CN202110782089 A CN 202110782089A CN 113224627 A CN113224627 A CN 113224627A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/0604—Crystal lasers or glass lasers in the form of a plate or disc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/0813—Configuration of resonator
- H01S3/0816—Configuration of resonator having 4 reflectors, e.g. Z-shaped resonators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
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Abstract
The invention provides a pulse type solid laser, which comprises a main oscillator component and a power amplifier component; the master oscillator component comprises a first pumping source, a laser output module and a laser transmission module, and light emitted by the first pumping source forms seed laser after passing through the laser output module; the laser transmission module comprises a first total reflection mirror and a plurality of reflection mirrors; a plurality of reflectors are arranged on one side opposite to the first total reflection mirror; the power amplifier assembly comprises a second pump source, a waveguide and a slab crystal; the slab crystal is positioned between the first total reflection mirror and the plurality of reflection mirrors, and light rays emitted by the second pumping source pass through the waveguide and the first total reflection mirror and then enter the slab crystal; the seed laser passes through a plurality of reflectors and a first total reflector. The laser output by the main oscillator component can be amplified to output laser power after passing through the slab crystal, and meanwhile, the quality and the pulse width of a light beam cannot be influenced, so that the laser with short pulse, large average power and high light beam quality can be provided.
Description
Technical Field
The invention relates to the technical field of solid lasers, in particular to a pulse type solid laser.
Background
The typical method for realizing high average power of the pulse type solid laser is to directly adjust Q in a resonant cavity by adopting an end-pumped or side-pumped solid laser medium. Such a solution is relatively simple in construction, but is very difficult to achieve with short pulse widths and high quality beam quality. In the aspect of realizing high-power laser output, the power and beam quality of the laser output are seriously reduced due to the large temperature gradient of the naturally-existing center and edge of the laser medium made of the square solid material, and meanwhile, the laser output based on the short pulse and high average power of the oscillator mode is relatively very difficult. In the prior art, a whole total reflection mirror with a certain included angle is adopted to form multi-pass amplification, but the structure easily causes self-excitation generation and cannot separate laser from amplified signal light.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a pulse type solid laser which is short in pulse, large in average power and high in beam quality.
The present invention achieves the above-described object by the following technical means.
A pulse type solid laser includes a master oscillator module and a power amplifier module; the master oscillator assembly comprises a first pumping source, a laser output module and a laser transmission module, and light emitted by the first pumping source forms seed laser after passing through the laser output module; the laser transmission module comprises a first total reflection mirror and a plurality of reflection mirrors; a plurality of reflectors are arranged on one side opposite to the first total reflection mirror; the power amplifier assembly comprises a second pump source, a waveguide and a slab crystal; the slab crystal is positioned between the first full-reflecting mirror and the plurality of reflecting mirrors, light rays emitted by the second pumping source pass through the waveguide and the first full-reflecting mirror and then enter the slab crystal, and the slab crystal is used for absorbing the light rays generated by the second pumping source; the seed laser passes through a plurality of reflectors and a first total reflection mirror, so that the seed laser forms multiple round trips in the slab crystal for amplifying the power of the seed laser.
Further, the laser output module comprises a second total reflection mirror, an output mirror, a solid laser medium, a polarizing film and a Q-switch; the light that first pump source sent passes through in proper order second is totally anti-mirror, solid laser medium, polaroid, transfer Q switch and output mirror, just the light that first pump source sent is in vibrate back formation seed laser between second is totally anti-mirror and the output mirror repeatedly, seed laser jets out by the output mirror.
Further, light rays on one side of the second total reflector are emitted into the surface and plated with a pumping light antireflection film, and light rays on the other side of the second total reflector are emitted out of the surface and plated with a pumping light antireflection film and a laser high reflection film; the light on one side of the output mirror is irradiated into a dielectric film with the surface coated with 30% of output laser, and the light on the other side of the output mirror is irradiated out of the surface coated with an output laser antireflection film.
Further, the laser output module further comprises a first lens and a second lens, wherein the first lens and the second lens are both convex lenses; and light rays emitted by the first pumping source sequentially pass through the first lens and the second lens and then enter the second total reflection mirror.
Further, the laser transmission module further comprises a third lens and a fourth lens, wherein the third lens is a convex lens, and the fourth lens is a concave cylindrical lens; and the seed laser emitted by the output mirror passes through the slab crystal and then is emitted into the first total reflection mirror after sequentially passing through the third lens and the fourth lens.
Furthermore, the laser transmission module also comprises a third reflector and a fourth reflector, and the seed laser emitted by the output mirror passes through the slab crystal and then is emitted into the first total reflector after sequentially passing through the third reflector and the fourth reflector.
Furthermore, the incidence surfaces of the reflectors, the third reflector and the fourth reflector are all plated with high-reflection films.
Further, the master oscillator assembly further comprises a faraday isolator, wherein the faraday isolator is positioned between the laser output module and the laser transmission module and is used for enabling light to be transmitted only in a single direction.
Further, the power amplifier assembly further comprises a fifth lens and a sixth lens; the fifth lens is positioned between the second pumping source and the waveguide, and the sixth lens is positioned between the waveguide and the first total reflection mirror and is used for shaping the pumping light generated by the second pumping source. Further, the light emitted by the second pumping source is emitted into the surface of one side of the first total reflection mirror, and a pumping light antireflection film is plated on the surface of one side of the first total reflection mirror; and the surface of the other side of the seed laser incident into the first total reflection mirror is plated with a pumping light antireflection film and a laser high reflection film.
Further, the first pump source is an optical fiber pump source; the second pump source is an array LD.
Further, the slab crystal is in a sheet shape, and the material of the slab crystal is Nd: YVO or Nd: YAG.
The invention has the beneficial effects that:
1. the pulse type solid laser device amplifies the output laser power of the seed laser output by the main oscillator component after passing through the slab crystal, and meanwhile, the quality and the pulse width of a light beam cannot be influenced, so that the laser output with short pulse, high average power and high light beam quality is realized.
2. The pulse type solid laser absorbs the energy of the second pumping source through the slab crystal and is used for amplifying the seed laser.
3. The pulse type solid laser adopts the short pulse seed source with lower output power, so that the quality of the short pulse seed laser output by the laser output module is high.
4. The pulse type solid laser realizes linear multi-pass amplification of seed light through the combined action of the first reflector, the second reflector, the first total reflection mirror, the slab crystal and the fourth reflector.
5. The pulse type solid laser provided by the invention effectively avoids the generation of self-laser and is easy to realize the separation of the self-laser by replacing a single reflector with a separated multi-reflector scheme, so that the linear multi-pass amplification can be better realized, the generation of self-excitation and the amplification of self-excitation signals can be effectively inhibited, and the laser amplification efficiency and the beam quality are improved.
Drawings
Fig. 1 is a schematic diagram of a pulse type solid laser according to the present invention.
In the figure:
10-a master oscillator component; 11-a first pump source; 12-a laser output module; 121-a second total reflection mirror; 122-an output mirror; 123-solid laser medium; 124-polarizer; 125-Q-switch; 126-a first lens; 127-a second lens; 13-a laser delivery module; 131-a first total reflection mirror; 132-a first mirror; 133-a second mirror; 134-a third lens; 135-a fourth lens; 136-a third mirror; 137-a fourth mirror; 20-a power amplifier component; 21-a second pump source; 22-a waveguide; 23-lath crystals; 24-a fifth lens; 25-sixth lens.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, a pulsed solid-state laser 100 according to the present invention includes a master oscillator module 10 and a power amplifier module 20.
The master oscillator assembly 10 includes a first pump source 11, a laser output module 12, and a laser delivery module 13. The light emitted by the first pump source 11 passes through the laser output module 12 to form seed laser; the laser transmission module 13 comprises a third reflector 136, a fourth reflector 137, a first total reflection mirror 131, and a first reflector 132 and a second reflector 133 which are positioned at the opposite side of the first total reflection mirror 131; the power amplifier assembly 20 comprises a second pump source 21, a waveguide 22 and a slab crystal 23; the slab crystal 23 is located between the first all-reflecting mirror 131 and the first reflecting mirror 132 and the second reflecting mirror 133, so that the laser light reflected by the laser delivery module 13 passes through the slab crystal 23 multiple times during reflection, generally the slab crystal 23 is located right in between the first all-reflecting mirror 131 and the first reflecting mirror 132 and the second reflecting mirror 133. The light emitted by the second pump source 21 passes through the waveguide 22 and the first all-mirror 131 and then enters the slab crystal 23, and the slab crystal 23 is used for absorbing the light generated by the second pump source 21, so that the power of the seed laser emitted by the master oscillator assembly 10 becomes higher after passing through the slab crystal 23 for multiple times; the light emitted from the first pumping source 11 is incident to the third reflector 136 and the fourth reflector 137 after passing through the seed laser formed by the laser output module 12, and reaches the first total reflection mirror 131 after being reflected by the fourth reflector 137, and the light reflected by the first total reflection mirror 131 is output after being reflected by the first reflector 132, the first total reflection mirror 131, the second reflector 133 and the first total reflection mirror 131 in sequence, so that the seed laser can form multiple round-trip in the slab crystal 23 for amplifying the power of the seed laser. The mirror on the opposite side of the first half mirror 131 may be multiple, and fig. 1 shows an embodiment with only the first mirror 132 and the second mirror 133. In the prior art, an integral total reflection mirror is generally used for multi-pass amplification, but self-laser is easily generated in the using process and cannot be separated from laser and amplified signal light. This affects laser amplification efficiency and degrades beam quality. The invention innovatively changes an integral total reflection mirror into a separated multi-reflection mirror, thereby effectively avoiding the generation of self-laser, easily realizing the separation of the self-laser and better realizing linear multi-pass amplification.
Specifically, the laser output module 12 includes a second full-mirror 121, an output mirror 122, a solid laser medium 123, a polarizer 124, and a Q-switch 125, the second full-mirror 121 and the output mirror 122 are disposed at an interval, light emitted from the first pump source 11 sequentially passes through the second full-mirror 121, the solid laser medium 123, the polarizer 124, the Q-switch 125, and the output mirror 122, and light emitted from the first pump source 11 is in the state of repeatedly oscillating between the second full-mirror 121 and the output mirror 122 to form seed laser, and the seed laser is emitted from the output mirror 122. The laser wavelength output by the laser output module 12 is 1064 nm.
The solid laser medium 123 is required to have good physical-chemical properties, a narrow fluorescence line, a strong and wide absorption band, and a high fluorescence quantum efficiency. The solid laser medium 123 may be Nd: YVO4 or Nd: YAG. In this embodiment, the size of the solid laser medium 123 may be 3mm × 10mm, wherein the 3mm × 3mm surface is plated with a pumping light and laser dual-transmittance film, such as a pumping light 808nm (T > 99%) and a laser 1064nm (T > 99%) dual-transmittance film.
The polarizer 124 serves to convert the laser light into linearly polarized light. The Q-switch 125 is used to compress the continuous laser light output in general into pulses with extremely narrow width for emission, so as to obtain high peak power, narrow pulse laser light.
In this embodiment, a pumping light antireflection film, for example, a pumping light antireflection film (T > 98%) is plated on a surface of the second total reflection mirror 121 close to the first pump source 11; and the surface of the side, which is far away from the first pump source 11, is plated with a pumping light antireflection film and a laser high-reflection film, such as a pumping light 808nm antireflection film (T > 98%) and a laser 1064nm high-reflection film (T > 99.8%). The surface of one side of the output mirror 122 facing the second all-mirror 121 is plated with a partial output laser dielectric film, for example, a dielectric film which transmits 30% output laser light of 1064 nm; and the surface of the side, which is far away from the second total reflection mirror 121, is plated with an output laser antireflection film, such as an output laser 1064nm antireflection film (T > 99%).
The laser output module 12 further comprises a first lens 126 and a second lens 127 coupled to the first lens 126 and the second lens 127, respectively, for collimating and focusing the first pump source 11, so that the first pump source 11 forms a desired pump spot size in the solid laser medium 123. Wherein the first lens 126 and the second lens 127 are both convex lenses. The first lens 126 is close to the first pump source 11, and the second lens 127 is close to the second all-mirror 121. In the present embodiment, the focal length f =20mm of the first lens 126, and the focal length f =20mm of the second lens 127.
The laser delivery module 13 further includes a third lens 134 and a fourth lens 135, and the third lens 134 and the fourth lens 135 are used to adjust the beam waist position, the beam waist shape, and the beam waist size of the seed laser emitted by the laser output module 12, so that the seed laser and the slab crystal 23 have good matching, and the best beam quality and the best magnification efficiency are obtained. The third lens 134 is a convex lens, and the fourth lens 135 is a concave cylindrical lens. The seed laser emitted by the laser output module 12 passes through the third lens 134 and the fourth lens 135 in sequence. In the present embodiment, the focal length f =100mm for the third lens 134, and the focal length f = -80mm for the fourth lens 135.
The laser transmission module 13 further includes a third reflecting mirror 136 and a fourth reflecting mirror 137, where the third reflecting mirror 136 and the fourth reflecting mirror 137 are configured to reflect the laser output by the laser output module 12, so that the laser can be incident on the first total reflection mirror 131. In the present embodiment, the third reflecting mirror 136 is close to the output mirror 122, and the 137 is close to the first half mirror 131. The seed laser output by the output mirror 122 is reflected to the first total reflection mirror 131 via the third reflection mirror 136 and the fourth reflection mirror 137.
The first mirror 132 and the second mirror 133 are coated with a 0 ° high reflection film, for example, a 0 ° high reflection film of laser 1064nm (T > 99.8%), toward the surface of the first all-mirror 131. The surface of the third mirror 136 facing the output mirror 122 is coated with a 45 ° high reflection film, such as a 1064nm 45 ° high reflection film (T > 99.8%); the surface of the fourth mirror 137 facing the first all-mirror 131 is coated with a 45 ° high-reflection film, for example, a 1064nm 45 ° high-reflection film (T > 99.8%).
The surface of one side of the first total reflection mirror 131 facing the waveguide 22 is plated with a pump light antireflection film, for example, a pump light antireflection film (T > 98%); and the surface of the side, which is far away from the waveguide 22, is plated with a pumping light antireflection film and a laser high-reflection film, such as a pumping light 808nm antireflection film (T > 98%) and a laser 1064nm high-reflection film (T > 99.8%).
The master oscillator component 10 further comprises a faraday isolator 14 located between the laser output module 12 and the laser transmission module 13, wherein the faraday isolator 14 only allows light to pass through in one direction and prevents the passive device from passing through in the opposite direction, and is used for limiting the light direction, so that the light can be transmitted in the single direction only, the light reflected by the echo can be well isolated by the optical isolator, the stability of laser output is improved, and the damage of the optical device is avoided.
The slab crystal 23 is in a thin plate shape, and the slab crystal 23 may be one of Nd: YVO4 or Nd: YAG, and when Nd: YVO4 material is selected, the doping atomic fraction may be 0.3% or other concentration. In this embodiment, the size of the slab crystal 23 is 14mm × 10mm × 1mm, wherein a pumping light and laser dual-transmission film is plated on the 14mm × 1mm surface, for example, a pumping light 808nm (T > 99%) and a laser 1064nm (T > 99%) dual-transmission film, a water conduction cooling mode is adopted on the 14mm × 10mm surface, the temperature of cold water is set to 25 °, the water temperature control precision is 0.1 °, and the stability of laser is facilitated.
The material of the waveguide 22 is BK 7. In this embodiment, the waveguide has a size of 60mm × 16mm × 3.5mm, and a surface of 16mm × 3.5mm is plated with a pump light antireflection film, for example, pump light 808nm (T > 99.8%), and the waveguide 22 can shape the pump light into uniform elongated spots in a discrete distribution between the reflecting surfaces at the two ends of the waveguide.
The power amplifier assembly 20 further comprises a fifth lens 24 and a sixth lens 25. The fifth lens 24 is located between the second pump source 21 and the waveguide 22, and is used for changing the direction of the light emitted from the second pump source 21 or controlling the distribution of the light from the pump source. The sixth lens 25 is located between the waveguide 22 and the first all-mirror 131, and is used for changing the direction of the light passing through the waveguide 22 or controlling the distribution of the pump source light.
In this embodiment, the first pump source 11 is an optical fiber pump source, and outputs pump light with a wavelength of 808 nm. The second pump source 21 is an array LD, and is a semiconductor laser in which a plurality of bars are vertically stacked, the output pump light wavelength is 808nm, and the fast axis direction of each bar is collimated.
The pulse type solid laser 100 provided by the invention can amplify the output laser power after passing the laser output by the main oscillator component 10 through the slab crystal 23, greatly improves the thermal effect influence of the slab crystal 23 due to the thinner thickness and the uniform and symmetrical cooling of the slab crystal 23, and simultaneously adopts the waveguide 22, the fifth lens 24 and the sixth lens 25 for the pump light homogenization design, so that the spatial distribution of the pump light entering the slab crystal 23 is more uniform, and the laser output with short pulse, high average power and high beam quality is realized. The present invention provides a pulsed solid-state laser 100 capable of providing a laser beam having a short pulse, a large average power, and a high beam quality. The specific principle is as follows:
the light emitted by the second pump source 21 passes through the fifth lens 24, the waveguide 22, the sixth lens 25 and the first total reflection mirror 131 and then enters the slab crystal 23, and the slab crystal 23 absorbs the light generated by the second pump source 21; meanwhile, the first pump source 11 obtains a set pump spot size through the first lens 126 and the second lens 127, and the laser beam passes through the second total reflection mirror 121, the solid laser medium 123, the polarizer 124 and the Q-switch 125 to output high peak power, narrow pulse seed laser; the narrow pulse seed laser with high peak power is output by the output mirror 122, passes through the third lens 134, the fourth lens 135, the third reflector 136 and the fourth reflector 137, and then has high peak power in the process of passing through the slab crystal 23, and the narrow pulse seed laser passes through the slab crystal 23 for multiple times to achieve the effect of amplifying the output laser power.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (12)
1. A pulsed solid state laser comprising a master oscillator assembly (10) and a power amplifier assembly (20); the master oscillator assembly (10) comprises a first pumping source (11), a laser output module (12) and a laser transmission module (13), wherein light emitted by the first pumping source (11) forms seed laser after passing through the laser output module (12); the laser transmission module (13) comprises a first total reflection mirror (131) and a plurality of reflection mirrors; a plurality of reflectors are arranged on one side opposite to the first total reflector (131); the power amplifier assembly (20) comprises a second pump source (21), a waveguide (22) and a slab crystal (23); the slab crystal (23) is positioned between the first total reflection mirror (131) and the plurality of reflection mirrors, light emitted by the second pump source (21) passes through the waveguide (22) and the first total reflection mirror (131) and then enters the slab crystal (23), and the slab crystal (23) is used for absorbing the light generated by the second pump source (21); the seed laser passes through a plurality of reflectors and a first total reflection mirror (131), so that the seed laser forms multiple round trips in a slab crystal (23) and is used for amplifying the power of the seed laser.
2. A pulsed solid-state laser according to claim 1, wherein the laser output module (12) comprises a second all-mirror (121), an output mirror (122), a solid-state laser medium (123), a polarizer (124), and a Q-switch (125); the light that first pump source (11) sent passes through in proper order second total reflection mirror (121), solid laser medium (123), polaroid (124), transfer Q switch (125) and output mirror (122), just the light that first pump source (11) sent is in form seed laser after shaking repeatedly between second total reflection mirror (121) and output mirror (122), seed laser is jetted out by output mirror (122).
3. The pulsed solid-state laser according to claim 2, wherein the light incident surface of one side of the second total reflection mirror (121) is coated with a pump light antireflection film, and the light incident surface of the other side of the second total reflection mirror (121) is coated with a pump light antireflection film and a laser high reflection film; light rays on one side of the output mirror (122) are emitted into a dielectric film with the surface coated with output laser, and light rays on the other side of the output mirror (122) are emitted out of the surface coated with an output laser antireflection film.
4. A pulsed solid state laser according to claim 2, wherein the laser output module (12) further comprises a first lens (126) and a second lens (127), the first lens (126) and the second lens (127) each being a convex lens; and light rays emitted by the first pumping source (11) sequentially pass through the first lens (126) and the second lens (127) and then enter the second total reflection mirror (121).
5. The pulsed solid-state laser according to claim 2, wherein the laser light delivery module (13) further comprises a third lens (134) and a fourth lens (135), the third lens (134) being a convex lens, the fourth lens (135) being a concave cylindrical lens; the seed laser emitted by the output mirror (122) passes through the third lens (134) and the fourth lens (135) in sequence and then penetrates through the slab crystal (23) to be emitted into the first total reflection mirror (131).
6. The pulsed solid-state laser according to claim 2, wherein the laser transmission module (13) further comprises a third mirror (136) and a fourth mirror (137), and the seed laser emitted from the output mirror (122) passes through the slab crystal (23) and enters the first total reflection mirror (131) after passing through the third mirror (136) and the fourth mirror (137) in sequence.
7. An impulse type solid state laser as claimed in claim 6, wherein the incidence surfaces of said several mirrors, said third mirror (136) and said fourth mirror (137) are coated with a high reflective film.
8. A pulsed solid state laser according to claim 1, wherein the master oscillator assembly (10) further comprises a faraday isolator (14), the faraday isolator (14) being located between the laser output module (12) and the laser delivery module (13) for enabling unidirectional transmission of light only.
9. A pulsed solid state laser according to claim 1, wherein the power amplifier assembly (20) further comprises a fifth lens (24) and a sixth lens (25); the fifth lens (24) is positioned between the second pump source (21) and the waveguide (22), and the sixth lens (25) is positioned between the waveguide (22) and the first total reflection mirror (131) and is used for shaping the pump light generated by the second pump source (21).
10. The pulsed solid-state laser according to any one of claims 1 to 9, wherein the light emitted from the second pump source (21) is incident on the surface of the first total reflection mirror (131) side and is coated with a pump light antireflection film; and the surface of the seed laser which is emitted into the other side of the first total reflection mirror (131) is plated with a pumping light antireflection film and a laser high reflection film.
11. A pulsed solid state laser according to any one of claims 1-9, wherein the first pump source (11) is a fiber pump source; the second pump source (21) is an array LD.
12. A pulse type solid state laser according to any one of claims 1 to 9, wherein the slab crystal (23) has a sheet shape, and the material of the slab crystal (23) is Nd: YVO or Nd: YAG.
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