CN111555105A - Solar pump and driven laser system - Google Patents

Abstract

The application discloses a solar pump and driven laser system, which comprises an optical lens group, a solar cell multiplexing system and a laser array system; the optical lens group and the solar cell multiplexing system are formed by splicing a plurality of splicing parts with multiplexing functions and can be spliced into a converging lens array, or a reflector array, or spliced into a solar cell panel array; the structure of the laser array system comprises a gain medium array and a transparent substrate, wherein the gain medium array is distributed on the transparent substrate. The invention uses the solar cell to replace a plurality of methods of reflecting and converging sunlight by using a reflector to pass through the gain medium for the second time in the prior scheme, converts light energy of wave bands which cannot be absorbed by the gain medium in the sunlight into electric energy, and greatly improves the utilization rate of the sunlight. Meanwhile, the power of output laser is improved by utilizing a multi-laser resonant cavity array beam combination mode.

Description

A Solar Pumped and Driven Laser System

technical field

The invention relates to the technical field of lasers, and in particular provides a solar energy pumping and driving laser system.

Background technique

Solid-state lasers are currently the most widely used and most mature type of lasers. The principle is based on the optical amplification of stimulated radiation of light to achieve laser power amplification under pumping conditions. Its basic structure is that the gain medium in the laser resonator is excited by a pump source, and the generated stimulated radiation is continuously amplified through the resonator and finally output as laser light. Conventional laser pump sources generally convert electrical energy into light energy of a specific wavelength, and then use the light energy to stimulate laser generation. This method involves multiple energy conversion processes, and the energy conversion efficiency is extremely low, and most of the energy is are converted into reactive power and dissipated. Sunlight has a very wide spectral range, including the spectrum that can be used as a laser pump light source. Therefore, sunlight can be directly used as a pump light source for lasers without multiple energy conversions, which is convenient for realizing and expanding the application of laser technology. scope, with objective prospects and economic value.

The current environmental problems and energy crisis have gradually emerged, and the research on how to utilize clean and renewable resources such as solar energy has been paid more and more attention. Traditional solar energy collection methods mainly include photothermal conversion, photoelectric conversion and solar-hydrogen energy conversion. Among them, solar cell technology is a relatively mature technology with relatively high energy utilization rate.

The general idea of the existing technology for generating laser by solar energy pumping is: concentrating sunlight through a lens to increase its energy density, and injecting the concentrated light spot from the side or end face of the gain medium as a pumping light source. In order to collect more solar energy, the size of the focusing mirror will be very large. It is difficult to process large-sized lenses using conventional materials, and the cost is high and easy to damage. Therefore, Fresnel lenses are often used. The focusing spot of the sunlight injection point on the laser gain medium is generally the focal point of the converging lens, and the converging spot is an extremely thin circle. adverse thermal effects. In addition, in order to improve the utilization rate of sunlight, a set of reflecting and converging lenses will be designed on the back of the gain medium to reflect and condense the sunlight and then pass through the gain medium again. However, such lenses are generally elliptical or parabolic mirrors, which are difficult to process and The wavelength band of sunlight that can be used as pump light after passing through the gain medium once has been absorbed. Even if the outgoing sunlight is reflected back to the gain medium, the remaining sunlight band components have almost no use value for the gain medium. . Therefore, the use of sunlight to generate laser light actually utilizes only a very small part of the spectral energy in the sunlight spectrum, and the utilization rate of light energy is still low.

SUMMARY OF THE INVENTION

The technical task of the present invention is to provide a solar pumped and driven laser system for the above-mentioned problems

For achieving the above object, the present invention provides the following technical solutions:

A solar pumping and driving laser system, the laser system includes an optical mirror group and a solar cell multiplexing system, a laser array system; the optical mirror group and the solar cell multiplexing system The laser array system consists of a gain medium array, a transparent substrate, the gain medium array is distributed on the transparent substrate, and the gain medium The array and gratings, coatings or mirrors at the ends form a laser resonator array. The laser resonator can be formed by arranging corresponding total reflection mirrors and half mirrors at both ends of each gain medium, or by coating total reflection films and half reflection films at both ends of each gain medium, or at each gain medium. Both ends of the gain medium are formed by photolithography of gratings with different reflectivities.

The lens composed of multiple converging lens groups converges sunlight onto the gain medium array of the laser array system, and the gain medium absorbs a specific spectrum of sunlight and generates laser light; after the absorption of the multi-layer gain medium array, the rest is not The absorbed sunlight passes through the laser array system and irradiates on the solar panel array formed by splicing multiple solar cells, which is converted into electrical energy storage, and is used for the solar positioning and tracking system, control and power system and laser array system. The additional laser pumping provides energy.

The gain medium array adopts a structure that is beneficial for lowering the laser threshold, including but not limited to a thin-film waveguide structure, a slab structure, a rod-like structure, a microchip structure, and an optical fiber structure. The length of the pump light-receiving surface of the gain medium is greater than its thickness, so as to eliminate the diffraction phenomenon of laser light during internal reflection.

The two end faces of each gain medium in the gain medium array are parallel plane or curved structures whose normal direction is the same as the light passing direction;

Or, two end faces of each gain medium in the gain medium array are at a certain angle, forming a Brewster window structure;

Or, one end face of each gain medium in the gain medium array is a constriction structure, and the shape and size of the end of the constriction are compatible with the size of the optical fiber.

Or, multiple gain media in the gain media array are connected in series to form a laser resonant cavity, for example, by setting up a Paul prism, setting two 45° mirrors, using optical fibers for conduction, or connecting the gain media located at the corresponding positions of different transparent substrates Align direct concatenation.

The transparent substrate is one of a flat plate shape, a curved plate shape, a solid cylindrical shape, a solid elliptical cylindrical shape, a cubic column shape or a parallelogram column shape, a prism shape, a solid circular truncated shape, a hollow or solid polygonal truncated shape, or more of the same or a combination or array of different shapes.

The material of the transparent substrate is a material with a wide spectral transmission range, high thermal conductivity and small thermal expansion coefficient, including but not limited to optical grade quartz glass, lithium niobate crystal, YAG, sapphire, etc., and the number is one or more arrays Arrange.

The laser resonator arrays are alternately distributed on the upper and lower or inner and outer sides of the transparent substrate in a fence manner, and different three-dimensional array structures are formed according to different shapes and array modes of the transparent substrate, so as to increase the sunlight irradiation area and reduce the gain at the same time. Negative effects of thermal effects on the laser when the medium volume is large.

The splicing part includes an optical mirror assembly surface and an opposite surface, a solar cell integrated board surface and an opposite surface and two end surfaces, wherein the two end surfaces are respectively connected with two retractable support rods through a rotating shaft, so that the splicing part can rotate around the axis; The surface of the optical mirror group and its opposite surface form a converging lens, which gathers sunlight to the gain medium array.

The optical mirror assembly surface and the opposite surface of each splicing part are elongated lenses formed by splicing multiple converging lenses, which condense the sunlight into an elongated light spot and irradiate it to the gain medium array of the laser array system. The shape and size of the spot All gain medium arrays can be covered.

The retractable support rod is installed on the annular track and can move along the track. By adjusting the length of the retractable support rod and in cooperation with the annular track, a plurality of splicing parts are spliced into a circular mirror, an elliptical mirror, a parabolic mirror or other desired shape.

The transparent substrate is in the form of a hollow cylinder, and all laser resonator arrays on the transparent substrate share a set of total reflection mirror, half reflection mirror and focusing mirror.

The total reflection mirror, the half reflection mirror and the focusing mirror are annular lenses with hollowed out middle parts.

The transparent substrate is a hollow truncated trough or a plurality of hollow truncated truncated truncated coaxially connected in series with different converging angles. The light-converging focal points of the laser resonator arrays on each truncated truncated truncated truncated truncated truncated truncated truncated truncated truncated truncated truncated troughs overlap to realize the self-focusing function.

The laser output from the laser resonator array can also be used as a pump light source for co-band pumping, and then injected into another gain medium to obtain a higher quality laser output.

The laser system also includes a solar positioning and tracking system, a control and power system, a laser beam combining unit, and an additional laser pump.

The solar panel array can provide power for additional laser pumping and additional pumping light for the laser resonator array, thereby further increasing the laser output power.

Compared with the prior art, the solar pumped and driven laser system of the present invention has the following outstanding beneficial effects:

The invention uses a micro-laser resonant cavity structure, which reduces the laser threshold, so that the laser can still be generated when the energy of the pumped sunlight is low. The gain medium array structure is conducive to heat dissipation, and can better reduce the influence of various thermal effects on the laser. At the same time, it is convenient to obtain the laser output of larger energy; the use of solar cells replaces the method of using mirrors to re-reflect and focus the solar energy back to the gain medium in many existing solutions, because the sunlight passing through the laser gain medium contributes to the generation of laser light The spectrum has been absorbed completely, and even if it is reflected back, it will have little effect. According to the analysis of Fig. 17 and Fig. 18, the wavelengths of sunlight that can be absorbed by the gain medium to generate laser light are only a few absorption peaks in the range of 350nm-400nm, 500nm-600nm, 700nm-900nm, and most of the sunlight energy It is still not effectively utilized. In this scheme, solar cells are used instead of reflectors. The solar cells have a very wide absorption range of the solar spectrum, and can also utilize the spectral range of sunlight that does not contribute to the generation of laser light, and convert them into electrical energy. Significantly improve the utilization of sunlight. The generated electric energy can be used for the operation of the entire system, and the excess electric energy can also drive an additional laser pump to provide additional pump light for the laser resonator array, thereby further improving the laser output power. The system can operate independently in the outer space environment without taking electricity from artificial satellites or space stations, and is also compatible with the ground environment, and has the technical prospect of obtaining high-power lasers. It can be used in space laser communication, lidar, atmospheric and surface structure detection , laser navigation, laser weapons, laser remote power transmission and other fields have broad application prospects.

Description of drawings

Fig. 1 is the schematic diagram of the laser system architecture of the solar light pumping and driving of the present invention;

2 is a schematic structural diagram of an optical mirror group and a solar cell multiplexing system of the present invention;

Fig. 3 is the structural representation of splicing part;

4 is a schematic diagram of the structure of a laser resonator in Embodiment 1;

5 is a schematic diagram of the structure of the laser resonator in Embodiment 2;

6 is a schematic structural diagram of the improvement of the laser resonator in Embodiment 2;

7 is a schematic diagram of the structure of a laser resonator in Embodiment 3;

FIG. 8 is a schematic diagram of the front structure of the flat fence type gain medium array of Embodiment 1;

9 is a schematic diagram of a three-dimensional structure of a gain medium in series;

10 is a schematic structural diagram of a hollow cylindrical gain medium array in Embodiment 4;

11 is a schematic diagram of the three-dimensional structure of the hollow cylindrical gain medium array in Embodiment 4

12 is a schematic structural diagram of the improvement of the hollow cylindrical gain medium array in Embodiment 4;

13 is a schematic structural diagram of another improvement of the hollow cylindrical gain medium array in Embodiment 4;

14 is a schematic structural diagram of a hollow truncated cone-shaped gain medium array in Embodiment 5;

15 is a schematic structural diagram of a plurality of series-connected hollow frustum-shaped gain medium arrays in Example 5;

Figure 16 is a schematic structural diagram of a laser beam combining unit;

Figure 17 is a graph of the solar spectrum;

Figure 18 is a graph of the room temperature absorption spectrum of Nd:YAG crystal.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

It should be understood that the terms "first", "second", "another" and the like used in the specification indicate sequential terms, as well as "upper", "lower", "front", "rear", "left" ”, “right”, “inner”, “outer” and other terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, are only for the convenience of description, and do not indicate or imply the referred device or The elements must have a specific orientation, be constructed and operated in a specific orientation; unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be interpreted in a broad sense, and therefore should not be interpreted as Limitations of the present invention.

Example 1

As shown in Figure 1, a solar-pumped and driven laser system includes an optical mirror group and a solar cell multiplexing system 1, a laser array system 2, a solar positioning and tracking system 3, a control and power system 4; laser beam combining unit, additional laser pumping; the additional laser pumping is used to convert the excess electricity collected by the solar cell into pump light, and provide an additional pumping source for the laser resonator array, thereby further increasing the output laser power.

As shown in FIG. 2 , the optical lens group and the solar cell multiplexing system 1 are spliced together by a plurality of splicing parts 1-1 with multiplexing function, which can be spliced into a focusing lens array or a mirror array, or can be spliced together. into a solar panel array;

As shown in FIG. 2 and FIG. 3 , the splicing part 1-1 includes the optical mirror assembly surface 1-1-2 and the opposite surface, the solar cell integrated board surface 1-1-3 and the opposite surface and two end surfaces, wherein the two end surfaces They are respectively connected with two retractable support rods 1-1-5 through the rotating shaft 1-1-6, so that the splicing part 1-1 can rotate around the axis; the optical mirror group surface 1-1-2 and its opposite surface constitute a converging lens , converging the sunlight to the gain medium array, the adjacent two opposite sides are the double-sided solar cell integrated panel surface 1-1-3 or one side is the solar cell integrated panel surface 1-1-3 and the other side is the solar light reflector; by rotating The cuboid aligns different faces with the sun, and can switch the function of converging lens, solar cell or light reflector.

The retractable support rod 1-1-5 is installed on the annular track and can move along the track. By adjusting the length of the retractable support rod 1-1-5 and matching with the annular track, a plurality of splicing parts are spliced into a circular surface. mirror, elliptical mirror, parabolic mirror or other desired shape.

The control and power system 4 can intelligently adjust the number of splicing parts 1-1 as optical lens groups and the number of splicing parts 1-1 as solar cells according to the data measured by the solar positioning and tracking system 3, and control the Each splice moves on the circular track 1-2 so that the system always obtains the best angle of incidence of sunlight.

The laser array system 2 is composed of a gain medium array 2-1, a laser resonator array 2-2, a transparent substrate 2-3, a laser beam combining unit 2-4, and an additional laser pump. The gain medium array is distributed in the spectral transmittance. A wide range of special materials on transparent substrates 2-3.

As shown in FIG. 4 , the gain medium 2-1 adopts a structure that is beneficial for reducing the laser threshold, including but not limited to a thin-film waveguide structure, a slab structure, a rod-like structure, a microchip structure, and an optical fiber structure, as shown in FIG. 9 ; In this embodiment, a slat structure is used.

The gain medium 2-1 can be selected from any known materials that can generate laser light, including but not limited to yttrium aluminum garnet series doping compounds (such as Nd:YAG, Yb:YAG, Ho:YAG, Er:YAG, Cr:Nd:YAG); doping compounds of the yttrium vanadate series (eg Nd:YVO ₄ ); ruby (Cr ³⁺ :Al ₂ O ₃ ), sapphire (Ti ³⁺ :Al ₂ O ₃ ), emerald ( Cr ³⁺ : Be ₃ Al ₂ (SiO ₃ ) ₆ ), alexandrite (Cr ³⁺ : BeAl ₂ O ₄ ), Nd ³⁺ : GGG (Gd ₃ Ga ₅ O ₁₂ ), Cr ³⁺ : ScBO ₃ , Co ²⁺ : MgF ₂ ; or doped with optical fibers, photonic crystal fibers containing transition metal elements or ions of described transition metal elements; Considering the requirements of the space laser against cosmic radiation, preferably, this embodiment selects Cr:Nd :YAG as gain medium.

The laser resonator array 2-2 is distributed on the transparent substrate 2-3, and the resonator includes a gain medium 2-1, a total reflection mirror 2-2-1, and a half mirror 2-2-2, wherein the total reflection mirror and The half mirrors can be plane mirrors or convex mirrors or concave mirrors or conical mirrors respectively; the total reflection mirror 2-2-1 and the half mirror 2-2-2 can be made of total reflection films respectively coated on the two light-passing surfaces of the gain medium. 2-2-3 and the semi-reflection film 2-2-4 are replaced, and the total reflection film 2-2-3 and the semi-reflection film 2-2-4 are selected in this embodiment.

The length of the pump light-receiving surface of the gain medium 2-1 is greater than its thickness, so as to eliminate the diffraction phenomenon of laser light during internal reflection.

As shown in FIG. 8 , the laser resonator arrays 2-2 are staggered on the upper and lower sides of the transparent substrate 2-3 in a fence manner, so as to increase the area irradiated by sunlight and reduce the deformation caused by the thermal effect when the volume of the gain medium is large. , stress, thermal lens effect, etc. have negative effects on the laser.

The material of the transparent substrates 2-3 is selected from a material with a wide spectral transmission range, a high thermal conductivity, and a small thermal expansion coefficient. Preferably, in this embodiment, a quartz material is selected.

This embodiment provides a space laser system, which can automatically track the sun's azimuth and adjust the light receiving angle of the system without additional power supply; the use of a micro-laser resonator array structure reduces the laser start-up threshold and makes it easier to obtain high-power lasers Output, and effectively reduce the negative impact of thermal effects on the laser, the combination of solar pumped lasers and solar cells greatly improves the utilization of solar energy.

Example 2

As shown in FIG. 5 , on the basis of Example 1, the two-pass light surfaces of the gain medium 2-1 are made into a Brewster window 2-1-1 structure. Correspondingly, the laser beam combining unit 2-4 Select polarization maintaining fiber and polarization beam combiner to obtain linear polarization output laser.

Or, as shown in FIG. 6 and FIG. 9 , on the basis of Embodiment 1, by arranging Paul prisms 2-2-5 between two adjacent gain media 2-1, multiple gain media can be In series, the laser power of a single laser resonator is increased, and the number of fibers in the laser beam combining unit 2-4 is reduced.

Example 3

As shown in FIG. 7 , on the basis of Embodiment 1, the gain medium is a thin-film waveguide structure, and gratings with different reflectivities are photoetched at both ends of each gain medium to replace the total mirror and the half mirror; the The laser resonator includes a laser gain medium 7-1, a high reflection grating 7-2, a low reflection grating 7-3, and a trapezoidal waveguide structure 7-4;

The trapezoidal waveguide structure 7-4 is located at the output end of the laser resonator. This structure can reduce the size of the output end of the waveguide to match the optical fiber, and can be directly connected to the optical fiber by fusion splicing. mirror group;

The high-reflection grating 7-2 and the low-reflection grating 7-3 are a pair of gratings whose center wavelengths are matched, and are directly written into the thin-film waveguide.

Furthermore, according to the inspiration of the above structure, a single-clad or unclad gain fiber can be directly used as a gain medium array, and high-reflection gratings and low-reflection gratings are photoetched at both ends to form a laser resonator.

Example 4

As shown in FIG. 10 and FIG. 11 , compared with Embodiment 3, the laser resonator array 10-1 and the transparent substrate 10-2 are hollow cylindrical structures, and the resonator arrays located inside and outside the transparent substrate 10-2 are staggered. structure;

The advantage of this structure is that all laser resonators in the array can share a set of total reflection mirrors 10-3, half mirrors 10-4 and focusing mirrors 10-5, and it is not necessary to process a set of very large size for each laser resonator. Small mirror group, so the processing difficulty of optical accessories is greatly reduced, and this structure is also suitable for flat arrays;

Multiple laser beams focused by this structure can be injected into a long fiber for beam shaping to obtain a uniform spot.

As shown in FIG. 12, further, the shared mirror 10-6, half mirror 10-7, and focusing mirror 10-8 are annular mirrors, and the cut-off part of the middle of each mirror can be processed into other mirrors for use, which greatly saves lens material;

Multiple laser beams focused by this structure can be injected into a long fiber for beam shaping to obtain a uniform spot.

As shown in FIG. 13 , further, in this embodiment, a fiber bundling method can also be used.

As shown in FIG. 16 , the laser beam combining units 2-4 can be directly used or injected into the optical fiber after being converged and shaped by the optical lens group, or can be coupled into the optical fiber beam combiner through each laser resonant cavity and then combined; this embodiment For example, the fiber combining method is selected. It should be understood that when there are many optical fibers to be combined, the laser combining unit 2-4 may be formed by combining a plurality of optical fiber combiners.

Different optical devices can be added in the laser beam combining units 2-4 to achieve power beam combining, coherent beam combining, spectrum combining, and even inject the laser generated by the laser array system into a new gain as the same-band pump light source. medium to obtain higher quality laser output.

Example 5

As shown in FIG. 14 , compared to Embodiment 4, the laser resonator array 14-1, the transparent substrate 14-2 is a hollow truncated truncated structure, and the resonator arrays located inside and outside the transparent substrate 14-2 are staggered structures;

The advantage of this structure is that the laser beams output by all the laser resonators in the array will intersect at one point, that is, it has a self-focusing function, so a set of focusing mirrors can be omitted;

Multiple laser beams focused by this structure can be injected into a long fiber for beam shaping to obtain a uniform spot.

As shown in Figure 15, further, by coaxially connecting a plurality of hollow truncated truncated cones with different convergence angles, and making the array focusing points of each truncated truncated cone coincide, so as to obtain higher laser power;

Multiple laser beams focused by this structure can be injected into a long fiber for beam shaping to obtain a uniform spot.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (12)

1. A solar energy pump and driven laser system is characterized in that the laser system comprises an optical lens group, a solar cell multiplexing system and a laser array system; the optical lens group and the solar cell multiplexing system are formed by splicing a plurality of splicing parts with multiplexing functions and can be spliced into a converging lens array, or a reflector array, or spliced into a solar cell panel array; the structure of the laser array system comprises a gain medium array and a transparent substrate, wherein the gain medium array is distributed on the transparent substrate, and the gain medium array and a grating, a coating film or a reflector at the end part of the gain medium array form a laser resonant cavity array.

2. A solar pumped and driven laser system according to claim 1, wherein: the gain medium array adopts a structure beneficial to reducing the laser threshold value, and comprises but is not limited to a thin film waveguide structure, a lath structure, a rod structure, a microchip structure and an optical fiber structure.

3. A solar pumped and driven laser system according to claim 2, wherein: the two end faces of each gain medium in the gain medium array are parallel planes or curved surface structures with the normal direction being the same as the light passing direction;

or two end faces of each gain medium in the gain medium array form a certain angle to form a Brewster window structure;

or, the output end of each gain medium in the gain medium array is of a throat structure, and the shape and size of the tail end of each throat are compatible with the size of the optical fiber;

or, a plurality of gain media in the gain medium array are connected in series to form a laser resonant cavity.

4. A solar pumped and driven laser system according to claim 1, wherein: the transparent substrate is in a shape of a flat plate, a bent plate, a solid cylinder, a solid elliptic cylinder, a cubic column or a parallelogram column, a prism, a solid truncated cone, a hollow or solid polygonal truncated cone, or a combination or an array of a plurality of same or different shapes.

5. A solar pumped and driven laser system according to claim 1, wherein: the transparent substrate is made of a material with a wide spectrum transmission range, a high heat conductivity coefficient and a small thermal expansion coefficient, and the number of the transparent substrates is one or more than one.

6. A solar pumped and driven laser system according to claim 4 or 5, wherein: the laser resonant cavity arrays are distributed on the upper surface and the lower surface or the inner surface and the outer surface of the transparent substrate in a staggered mode in a fence mode, and different three-dimensional array structures are formed according to different shapes and array modes of the transparent substrate.

7. A solar pumped and driven laser system according to claim 1, wherein: the splicing part comprises an optical lens group surface and an opposite surface, a solar cell integrated plate surface and an opposite surface and two end surfaces, wherein the two end surfaces are respectively connected with the two telescopic supporting rods through rotating shafts; the optical lens group surface and the opposite surface form a converging lens to converge sunlight to the gain medium array, and the two adjacent opposite surfaces are double-sided solar cell integrated plate surfaces, or one surface is a solar cell integrated plate surface and the other surface is a sunlight reflector.

8. A solar pumped and driven laser system according to claim 7, wherein: the telescopic supporting rod is arranged on the annular track and can move along the track.

9. A solar pumped and driven laser system according to claim 1, wherein: the transparent substrate is in a hollow column shape, and all laser resonant cavity arrays on the transparent substrate share one set of total reflection mirror, half reflection mirror and focusing mirror.

10. A solar pumped and driven laser system according to claim 9, wherein: the total reflection mirror, the semi-reflection mirror and the focusing mirror are annular lenses with hollow middle parts.

11. A solar pumped and driven laser system according to claim 1, wherein: the transparent substrate is a hollow round table or a plurality of hollow round tables which are coaxially connected in series and have different convergence angles, and the light convergence focuses of the laser resonant cavity arrays on the round tables are superposed to realize the self-focusing function.

12. A solar pumped and driven laser system according to any of claims 9-11, wherein: the laser output by the laser resonant cavity array is used as a pumping light source with the same pump and then injected into another gain medium to obtain higher-quality laser output.

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