Multi-pass reflection lath laser oscillation device
By using a multi-path reflector slab laser oscillation device, the problems of large spot size and high temperature gradient in traditional lasers are solved, thereby improving beam quality and increasing laser energy, making it suitable for applications in various laser devices.
Patent Information
- Application Number
- CN202610213864.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-13
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional rod lasers and Zigzag slab lasers suffer from problems such as large spot size, high temperature gradient, and poor beam quality when generating high-energy lasers, which limits the improvement of high-energy laser brightness.
A multi-path reflector slab laser oscillation device is adopted, which realizes laser oscillation by utilizing the multi-path reflection structure. It uses a small spot diameter to resonate in the cavity. Combined with the unstable cavity structure and small-diameter Q switch, pulse output is realized, and it can be further amplified or frequency-converted.
It reduces beam quality degradation, improves beam quality, achieves resonance with a smaller spot diameter, and enhances laser utilization and output capability.
Smart Images
Figure CN122026210A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of solid-state laser technology, and in particular relates to a multi-path reflective slab laser oscillation device. Background Technology
[0002] High-energy lasers play a crucial role in the application of modern laser technology. With the advancement of science and technology, the growth of industrial processing demands, and the needs of national defense and military, the demand for even higher-energy lasers is becoming increasingly urgent.
[0003] Traditional rod laser schemes for generating high-energy lasers are limited by severe thermal effects, making it difficult to achieve an average power exceeding kilowatts (kW). Traditional Zigzag slab laser schemes suffer from problems in the width direction, such as large spot size, large temperature gradient, and poor beam quality, which limit the improvement of high-energy laser brightness. Summary of the Invention
[0004] This application provides a multi-path reflective slab laser oscillation device to solve the problems of large spot size, large temperature gradient and poor beam quality.
[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, embodiments of this application provide a multi-path reflective slab laser oscillation device, the device comprising: a pump source, a first cavity mirror, a second cavity mirror, a first reflector, a second reflector, and a laser material; The laser material is provided with a first reflector and a second reflector on both sides, respectively. The first cavity mirror and the first reflector are located on the same side of the laser material, and the second cavity mirror and the second reflector are located on the same side of the laser material; The pump source is used to generate pump light, which enters the laser material to excite the laser material to generate laser light; The first cavity mirror, the first reflector, and the second reflector are used to reflect the laser so that the laser is output from the second cavity mirror.
[0006] Optionally, the first reflector and the second reflector are symmetrically distributed on both sides of the laser material at a predetermined angle; The pump source is located on the side of the first or second mirror away from the laser material. The pump light passes through the first or second mirror and enters the laser material to excite the laser material to generate laser light.
[0007] Optionally, the side of the laser material is provided with a pump light high-transmittance film and a laser high-transmittance film; The reflector is equipped with a laser high-reflectivity film and a pump light high-transmittance film.
[0008] Optionally, the pump source is located above or below the laser material, such that the pump light enters the laser material from the upper or lower large surface, wherein the upper or lower large surface is a surface of the laser material that is perpendicular to the reflecting surfaces of the first and second reflectors.
[0009] Optionally, the side of the laser material is provided with a high-transmittance laser film, and the upper and lower large surfaces of the laser material are respectively provided with a high-transmittance pump light film and a high-reflectance pump light film; The reflector is equipped with a laser high-reflectivity coating.
[0010] Optionally, the first cavity mirror and the second cavity mirror reflect the laser to form a two-way oscillation.
[0011] Optionally, the device may further include: a waveguide or an aperture; The waveguide or the aperture is located between the first cavity mirror and the laser material, or between the second cavity mirror and the laser material, to limit the oscillation mode volume of the laser.
[0012] Optionally, the device further includes: an optically rotating crystal or a quarter-wave plate; The optical rotator crystal or the quarter-wave plate is used to compensate for thermal depolarization of the laser material. The optically rotating crystal or the quarter-wave plate is located on the reflecting surface of the first and / or the second mirror.
[0013] Optionally, the device further includes: a scraper mirror; The scraper mirror is located between the second cavity mirror and the laser material, and the laser is output through the scraper mirror.
[0014] Optionally, the device further includes: a laser switch; The laser switch is located between the second cavity mirror and the laser material, and the laser switch is used to control the laser to form a pulsed output through the second cavity mirror.
[0015] Optionally, the first cavity mirror is provided with a high-reflectivity laser coating, and the second cavity mirror is provided with the high-reflectivity laser coating or a laser partially transparent coating.
[0016] Optionally, the laser material includes: a first laser material and a second laser material; The first laser material and the second laser material are arranged between the first reflector and the second reflector along a first direction or a second direction, wherein the first direction and the second direction are perpendicular to each other in the same plane.
[0017] Optionally, the first and second reflectors are plane mirrors, cylindrical mirrors, or curved mirrors.
[0018] Optionally, the device further includes: a thermal management component; the thermal management component includes: a waveguide or a heat sink; The waveguide is used to provide cooling channels, and the heat sink is used to cool the laser material.
[0019] Secondly, embodiments of this application provide a laser device, the laser device comprising: a multi-path reflector slab laser oscillation device as described in any of the first aspects, wherein the laser output by the multi-path reflector slab laser oscillation device is used as seed light to generate amplified laser, or as fundamental frequency light to generate frequency-converted laser.
[0020] This application provides a multi-path reflective slab laser oscillation device that achieves laser oscillation through a multi-path slab structure. Compared to the traditional Zigzag slab structure, which suffers from large spot diameter, high temperature gradient, and poor beam quality in the width direction, this structure uses a smaller spot diameter to resonate within the cavity. This results in a smaller temperature gradient in the area where the spot is located during resonance, greatly reducing the deterioration of beam quality and significantly improving beam quality. Combined with the unstable cavity structure, a smaller aperture Q-switch can also be used to achieve pulse output, and subsequent amplification or frequency conversion can be performed. Attached Figure Description
[0021] Figure 1 A schematic diagram of a multi-path reflective slab laser oscillation device provided in this application embodiment; Figure 2 This is a schematic diagram of the structure of a laser material provided in an embodiment of this application; Figure 3 A schematic diagram of another multi-path reflective slab laser oscillation device provided in this application embodiment; Figure 4A A schematic diagram of another multi-path reflective slab laser oscillation device provided in this application embodiment; Figure 4B A schematic diagram of another multi-path reflective slab laser oscillation device provided in this application embodiment; Figure 5 A schematic diagram of another multi-path reflective slab laser oscillation device provided in this application embodiment; Figure 6A A schematic diagram of another multi-path reflective slab laser oscillation device provided in this application embodiment; Figure 6B A schematic diagram of another multi-path reflective slab laser oscillation device provided in this application embodiment; Figure 6C This is a schematic diagram of another multi-path reflective slab laser oscillation device provided in the embodiments of this application. Detailed Implementation
[0022] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.
[0023] In the application of modern laser technology, high-energy lasers play a crucial role. With advancements in technology, increasing demands in industrial processing, and the needs of national defense, the demand for even higher-energy lasers is becoming increasingly urgent. Traditional rod-shaped lasers for generating high-energy lasers are limited by severe thermal effects, making it difficult to achieve average power exceeding the kW level. Traditional Zigzag slab lasers, with their large spot size and significant temperature gradient along the width direction, suffer from poor beam quality, limiting the improvement of high-energy laser brightness. This invention proposes a multi-path reflection slab laser oscillation device. Utilizing a multi-path reflection structure to achieve laser oscillation, it employs a smaller spot diameter for intracavity resonance, resulting in a smaller temperature gradient within the spot region during resonance. This significantly reduces beam quality degradation and effectively extends the optical path length within the crystal, improving utilization. Notably, a Q-switch with an aperture smaller than the slab diameter can be used to achieve Q-switched laser output, further enabling laser amplification and frequency conversion.
[0024] Figure 1 A schematic diagram of a multi-path reflective slab laser oscillation device provided in this application embodiment is shown below. Figure 1 As shown, the device includes: a pump source 101, a first cavity mirror 102, a second cavity mirror 103, a first reflector 104, a second reflector 105, and a laser material 106.
[0025] The laser material 106 has a first reflector 104 and a second reflector 105 on its two sides, respectively.
[0026] Moreover, the first cavity mirror 102 and the first reflector 104 are located on the same side of the laser material 106, and the second cavity mirror 103 and the second reflector 105 are located on the same side of the laser material 106.
[0027] Correspondingly, the pump source 101 is used to generate pump light, which can enter the laser material 106 and excite the activating ions in the laser material 106 to generate laser light.
[0028] During propagation, the laser can travel from inside the laser material 106 to the outside of the laser material 106, and then be reflected by the first cavity mirror 102, the first reflector 104 and the second reflector 105, so that the laser can re-enter the laser material 106 and propagate multiple times within the laser material 105. This allows the laser to be activated again within the laser material 103 to increase the laser energy, and finally the laser is output from the second cavity mirror 103.
[0029] The first cavity mirror 102 can reflect the laser to the laser material 106, pass through the laser material 106, and then be reflected back to the laser material 106 by the second mirror 105. Similarly, the second mirror 105 can reflect the laser to the laser material 106, pass through the laser material 106, be reflected back to the laser material 106 by the first mirror 104, and finally be output through the second cavity mirror 103.
[0030] In addition, the pump source 101 can be located at different positions around the laser material 106, thereby generating pump light that enters the laser material 106 from different positions.
[0031] Accordingly, see Figure 2 , Figure 2 This is a schematic diagram of the structure of a laser material provided in an embodiment of this application. The X-axis of the laser material 106 can be the length direction, the Y-axis can be the thickness direction, and the Z-axis can be the width direction.
[0032] Correspondingly, the upper and lower surfaces of the laser material 106 can be two planes formed by the X-axis (length direction) and the Z-axis (width direction); the side surface of the laser material 1022 can be a plane formed by the Y-axis (thickness direction) and the Z-axis (width direction).
[0033] For example, see Figure 1 The pump source 101 can be located on the side of the first reflector 104 or the second reflector 105 away from the laser material 106, so that the pump light can pass through the first reflector 104 or the second reflector 105 and enter the laser material 106 to excite the laser material 106 to generate laser light.
[0034] Correspondingly, the first reflector 104 and the second reflector 105 are symmetrically distributed on both sides of the laser material 103 at a predetermined angle to reflect the laser, so that the laser can propagate multiple times inside the laser material 103.
[0035] The pre-set included angle can be determined based on the multiplier, the laser incident angle, the size of the incident spot, and the size of the emitted spot. In this embodiment, the pre-set included angle between the reflectors 104 is not specifically limited.
[0036] Furthermore, the side of the laser material 106 may be provided with a pump light high-transmittance film and a laser high-transmittance film, and the first reflector 104 and the second reflector 105 may also be provided with a laser high-reflectance film and a pump light high-transmittance film, thereby increasing the transmittance of the pump light and improving the reflectivity of the laser.
[0037] Or see Figure 3 , Figure 3 This is a schematic diagram of another multi-path reflective slab laser oscillation device provided in an embodiment of this application. The pump source 101 can be located above or below the laser material 106, so that the pump light enters the laser material 106 from the upper or lower large surface.
[0038] The upper or lower large surface is a surface of the laser material 106 that is perpendicular to the reflecting surfaces of the first reflector 104 and the second reflector 105.
[0039] Correspondingly, a high-transmittance laser film can be provided on the side of the laser material 106, while a pump light high-transmittance film and a pump light high-reflection film can be provided on the upper and lower surfaces of the laser material 106, respectively. The first reflector 104 and the second reflector 105 can be provided with high-reflection laser films.
[0040] The pump light high-transmittance film is located on the side of the laser material 106 closer to the pump source 101, while the pump light high-reflectance film is located on the side of the laser material 106 away from the pump source 101.
[0041] Similarly, the first cavity mirror 102 may be equipped with a high-reflectivity laser coating to achieve high reflectivity of the laser. The second cavity mirror 103 may be equipped with a high-reflectivity laser coating or a laser partially transparent coating. When the second cavity mirror 103 is equipped with a laser partially transparent coating, the transmittance of the laser output from the second cavity mirror 103 can be improved.
[0042] It should be noted that the first reflecting mirror 104 and the second reflecting mirror 105 can both be plane mirrors, cylindrical mirrors or curved mirrors. Curved mirrors can be spherical mirrors or aspherical mirrors. The embodiments of this application do not specifically limit the types of the first reflecting mirror 104 and the second reflecting mirror 105.
[0043] In addition, the laser material 106 is a laser gain material, such as a crystal, ceramic or glass laser gain material, and the activating ion of the laser material 106 may include at least one of neodymium (Nd), ytterbium (Yb), titanium (Ti), praseodymium (Pr), chromium (Cr), thulium (Tm) or holmium (Ho). The embodiments of this application do not specifically limit the type of laser material 106 and the activating ion.
[0044] In one alternative embodiment, see Figure 4A and Figure 4B Figure 4A and Figure 4BThese are schematic diagrams of another multi-path reflective slab laser oscillation device provided in the embodiments of this application. The laser material 106 includes: a first laser material 1061 and a second laser material 1062.
[0045] The first laser material 1061 and the second laser material 1062 can be arranged between the first reflector 104 and the second reflector 105 along a first direction or a second direction, with the first direction and the second direction being perpendicular to each other in the same plane.
[0046] For example, such as Figure 4A As shown, the first laser material 1061 and the second laser material 1062 can be along the first direction ( Figure 4A (Horizontal) arrangement; similarly, such as Figure 4B As shown, the first laser material 1061 and the second laser material 1062 can be along the second direction ( Figure 4B The arrangement is vertical (in the middle), with the first direction perpendicular to the second direction.
[0047] Correspondingly, after passing through the first laser material 1061, the laser can enter the second laser material 1062 and activate the activating ions within it, thereby increasing the laser energy. Similarly, after passing through the second laser material 1062, the laser can also enter the second laser material 1062 and activate the activating ions within it. Therefore, by arranging the two laser materials 106 side-by-side, the problem of the small size of the slab laser gain medium limited by the growth process can be effectively solved, thus increasing the laser power.
[0048] It should be noted that the above description only uses the example of the laser material 106 including the first laser material 1061 and the second laser material 1062. In actual applications, multiple laser materials 106 can also be arranged (such as 3, 4 or 5 laser materials 106). This application embodiment does not specifically limit the number and arrangement of laser materials 106.
[0049] In another alternative embodiment, see Figure 5 , Figure 5 This is a schematic diagram of another multi-path reflective slab laser oscillation device provided in an embodiment of this application. The device may further include a scraper mirror 107.
[0050] The scraper mirror 107 can be located between the second cavity mirror 103 and the laser material 106, and the laser can be output through the scraper mirror. For example, the scraper mirror 107 can be a trapezoidal reflecting mirror or a mirror of other shapes. The shape of the scraper mirror 107 is not specifically limited in this embodiment.
[0051] Furthermore, when the multi-path reflective slab laser oscillation device includes a scraper mirror 107, the second cavity mirror 103 can be provided with a high-reflectivity laser film, so that the laser can be continuously reflected in the laser material 106 through the first cavity mirror 102, the second cavity mirror 103, the first reflector 104, and the second reflector 105 to achieve laser oscillation, thereby forming a negative branch unstable cavity, and finally output through the scraper mirror 107.
[0052] Further, see Figure 5 The device may also include a laser switch 108.
[0053] The laser switch 108 can be located between the second cavity mirror 103 and the laser material 106. The laser switch 108 is used to control the laser to form a pulse modulation output through the second cavity mirror 103.
[0054] For example, the laser switch 108 can be a Q switch. When the multi-path reflector slab laser oscillator is in Q-switched operation, a smaller Q switch with a smaller aperture than the laser material 106 in the direction of the laser can be used to achieve Q-switched operation.
[0055] It should be noted that in practical applications, the multi-path reflective slab laser oscillation device can output through the scraper mirror 107 alone, or through the laser switch 108 alone to achieve pulse modulation output, or it can output through both the scraper mirror 107 and the laser switch 108 simultaneously. This application embodiment does not specifically limit this.
[0056] The above describes the laser oscillation in laser material 106 using a single-pass oscillation as an example. In practical applications, the laser can also form a two-pass oscillation through the first cavity mirror 102, the second cavity mirror 103, the first reflecting mirror 104, and the second reflecting mirror 105. The process of two-pass laser oscillation is described below.
[0057] See Figure 6A , Figure 6A A schematic diagram of another multi-path reflective slab laser oscillation device provided in this application embodiment is shown below. Figure 6A As shown, the first cavity mirror 102 and the second cavity mirror 103 reflect the laser to form a two-way oscillation.
[0058] The laser material 106 can form a laser after being excited by the pump light emitted by the pump source 101. Since each laser has a different propagation path, the laser can be continuously excited by two-way oscillation or multi-way oscillation to increase the laser energy.
[0059] The following explanation uses a two-way oscillation as an example.
[0060] Specifically, after the laser material 106 generates two laser beams with different propagation paths, one of the laser beams can pass through the first cavity mirror 102, the first reflector 104 and the second reflector 105 through continuous reflection. After the laser energy reaches the threshold, it passes through the first cavity mirror 102 and outputs laser.
[0061] Similarly, another laser beam generated by the laser material 106 can also pass through the second cavity mirror 103 and output laser after the laser energy reaches the threshold through the continuous reflection of the second cavity mirror 103, the first reflector 104 and the second reflector 105.
[0062] Correspondingly, the two laser beams propagate and reflect through different propagation paths, thus forming a two-way oscillation through the first cavity mirror 102, the second cavity mirror 103, the first reflecting mirror 104, and the second reflecting mirror 105.
[0063] Further, see Figure 6B , Figure 6B This is a schematic diagram of another multi-path reflective slab laser oscillation device provided in an embodiment of this application. The device also includes a waveguide or aperture 109.
[0064] The waveguide or aperture 109 can be located between the first cavity mirror 102 and the laser material 106, or between the second cavity mirror 103 and the laser material 106, so that the output laser can be limited by the waveguide or aperture 109, thereby limiting the oscillation mode volume of the laser.
[0065] It should be noted that, see Figure 6C , Figure 6C This is a schematic diagram of another multi-path reflective slab laser oscillation device provided in an embodiment of this application. The device further includes an optically rotating crystal or a quarter-wave plate 110.
[0066] The optical rotator crystal or quarter-wave plate 110 is located on the reflecting surface of the first reflecting mirror 104 and / or the second reflecting mirror 105. The optical rotator crystal or quarter-wave plate 110 is used to compensate for thermal depolarization of the laser material. Moreover, the optical rotator crystal can be a 90-degree optical rotator crystal or an optical rotator crystal with other angles. The embodiments of this application do not specifically limit the angle corresponding to the optical rotator crystal.
[0067] For example, if the device includes two optically active crystals or quarter-wave plates 110, one optically active crystal or quarter-wave plate 110 may be located on the reflecting surface of the first reflector 104, and the other optically active crystal or quarter-wave plate 110 may be located on the reflecting surface of the second reflector 105.
[0068] In another alternative embodiment, the device may further include a thermal management component, which includes a waveguide or a heat sink.
[0069] The waveguide provides cooling channels, and the heat sink cools the laser material 106. Correspondingly, the thermal management components can be used for forced convection cooling and forced convection conduction cooling of the laser material 106, thereby achieving cooling of the laser material 106.
[0070] Furthermore, the aforementioned multi-path reflector slab laser oscillation device can be applied to different laser devices to generate different lasers. Correspondingly, the laser device may include, for example... Figures 1 to 6C Any of the multi-path reflective slab laser oscillation devices shown.
[0071] When a laser device is used to output amplified laser light, the laser light output by the multi-pass reflector slab laser oscillator can be used as seed light to generate amplified laser light; when a laser device is used to output frequency-converted laser light, the laser light output by the multi-pass reflector slab laser oscillator can be used as fundamental frequency light to generate frequency-converted laser light.
[0072] For example, when the laser material 106 is Nd:YAG, it can output 1064 nanometers (nm) laser. Subsequently, 532nm laser output can be achieved through the frequency doubling device of the laser equipment, and 355nm laser output can also be achieved through the third frequency doubling laser device of the laser equipment.
[0073] In summary, the multi-path reflective slab laser oscillation device provided in this application achieves laser oscillation through a multi-path slab structure. Compared with the traditional Zigzag slab structure, which suffers from large spot diameter, high temperature gradient, and poor beam quality in the width direction, this structure uses a smaller spot diameter to resonate within the cavity. This results in a smaller temperature gradient in the area where the spot is located during the resonance process, greatly reducing the deterioration of beam quality and significantly improving beam quality. Combined with the unstable cavity structure, a smaller diameter Q-switch can also be used to achieve pulse output, and subsequent amplification or frequency conversion can be performed.
[0074] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.
[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0076] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0077] In the embodiments provided in this application, it should be understood that the disclosed apparatus / devices and methods can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0078] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.
[0079] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0080] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."
[0081] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0082] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A multi-path reflective slab laser oscillation device, characterized in that, The device includes: a pump source, a first cavity mirror, a second cavity mirror, a first reflecting mirror, a second reflecting mirror, and laser material; The laser material is provided with a first reflector and a second reflector on both sides, respectively. The first cavity mirror and the first reflector are located on the same side of the laser material, and the second cavity mirror and the second reflector are located on the same side of the laser material; The pump source is used to generate pump light, which enters the laser material to excite the laser material to generate laser light; The first cavity mirror, the first reflector, and the second reflector are used to reflect the laser so that the laser is output from the second cavity mirror.
2. The apparatus according to claim 1, characterized in that, The first reflector and the second reflector are symmetrically distributed on both sides of the laser material at a predetermined angle; The pump source is located on the side of the first or second mirror away from the laser material. The pump light passes through the first or second mirror and enters the laser material to excite the laser material to generate laser light.
3. The apparatus according to claim 2, characterized in that, The side of the laser material is provided with a pump light high-transmittance film and a laser high-transmittance film; The reflector is equipped with a laser high-reflectivity film and a pump light high-transmittance film.
4. The apparatus according to claim 1, characterized in that, The pump source is located above or below the laser material, so that the pump light enters the laser material from the upper or lower large surface, wherein the upper or lower large surface is a surface of the laser material that is perpendicular to the reflecting surfaces of the first and second reflectors.
5. The apparatus according to claim 4, characterized in that, The side of the laser material is provided with a high-transmittance laser film, and the upper and lower surfaces of the laser material are respectively provided with a high-transmittance pump light film and a high-reflectance pump light film. The reflector is equipped with a laser high-reflectivity coating.
6. The apparatus according to claim 1, characterized in that, The device also includes: a scraper mirror; The scraper mirror is located between the second cavity mirror and the laser material, and the laser is output through the scraper mirror.
7. The apparatus according to claim 1, characterized in that, The device also includes: a laser switch; The laser switch is located between the second cavity mirror and the laser material, and the laser switch is used to control the laser to form a pulsed output through the second cavity mirror.
8. The apparatus according to any one of claims 1 to 7, characterized in that, The first cavity mirror is equipped with a laser high reflectivity film, and the second cavity mirror is equipped with the laser high reflectivity film or a laser partial transmittance film; The first and second reflecting mirrors are plane mirrors, cylindrical mirrors, or curved mirrors.
9. The apparatus according to any one of claims 1 to 7, characterized in that, The laser material includes: a first laser material and a second laser material; The first laser material and the second laser material are arranged between the first reflector and the second reflector along a first direction or a second direction, wherein the first direction and the second direction are perpendicular to each other in the same plane.
10. The apparatus according to any one of claims 1 to 7, characterized in that, The device further includes: a thermal management component; the thermal management component includes: a waveguide or a heat sink; The waveguide is used to provide cooling channels, and the heat sink is used to cool the laser material.