Multi-beam pulse yellow laser system

Abstract

The invention discloses a multi-beam pulse yellow external laser system, which comprises a first light path, a second light path and a third light path. The first light path is composed of a pumping source, a laser crystal and a rear cavity mirror, and the laser crystal and the rear cavity mirror are connected through a pumping coupling system. The second light path is used for converting the fundamental frequency light into frequency doubling light, the light beam is divided into a plurality of small light beams through a micro-lens array A, the small light beams are focused to different positions of the sum frequency crystal through a wavelength conversion module, and multiple beams of pulse yellow laser are generated in the sum frequency crystal; the spectroscope reflects the fundamental frequency light and transmits the frequency doubling light and the finally generated yellow laser; an incident parallel light beam is divided into a plurality of small light beams through a micro lens array A, the small light beams are focused to different positions of a sum frequency crystal, and a plurality of pulse yellow laser beams are directly generated in the sum frequency crystal; the multi-beam laser can be used for multi-point simultaneous processing, the multi-beam laser can realize faster and finer material processing, and the processing efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of yellow laser, in particular to a multi-beam pulsed yellow laser system. Background Art

[0002] In modern industry and scientific research, laser systems are widely used in fields such as material processing, precision manufacturing, medical surgery, and nonlinear optical research. Traditional laser systems usually use a single beam output to process the target material by focusing or scanning. For example, in industrial applications such as laser cutting, welding, and marking, a single laser beam can provide high energy density and achieve efficient processing; in the field of scientific research, a single laser beam is used to accurately control experimental conditions and conduct complex optical experiments. In addition, frequency doubling and sum frequency techniques are also widely used to convert fundamental frequency light into higher frequency light through nonlinear optical crystals to meet the needs of different wavelengths.

[0003] Although traditional laser systems perform well in many application scenarios, they also have some significant limitations. First, a single laser beam is inefficient when processing multiple points simultaneously and cannot meet the needs of high-throughput production, especially in the fields of micromachining and precision manufacturing, which require higher processing speeds and precision. Second, traditional systems are prone to damage to nonlinear optical crystals under high-power operation, limiting the stability and service life of the system. Summary of the invention

[0004] The invention overcomes the shortcomings of the prior art and provides a multi-beam pulsed yellow laser system.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a multi-beam pulsed yellow laser system, comprising: a first optical path and a second optical path; a beam splitter connected to the first optical path and the second optical path, and a microlens array B connected to the beam splitter; the microlens array B is connected to an output port;

[0006] The first optical path includes a pump source, a laser crystal connected to the pump source via a pump coupling system, a back cavity mirror connected to the laser crystal, and the back cavity mirror connected to the beam splitter;

[0007] The second optical path includes a frequency doubling crystal, a shaping lens connected to the frequency doubling crystal, a microlens array A connected to the shaping lens, a wavelength conversion module connected to the microlens array A, a sum frequency crystal connected to the wavelength conversion module, and the sum frequency crystal is connected to the spectroscope.

[0008] In a preferred embodiment of the present invention, the pump source is one or more of a semiconductor laser, a solid laser, a dye laser or a gas laser.

[0009] In a preferred embodiment of the present invention, the laser crystal is selected from one or more of Nd:YVO4, Nd:YAG or Ti:sapphire, and the laser crystal is used to generate fundamental frequency light through energy provided by a pump source.

[0010] In a preferred embodiment of the present invention, the beam splitter is a double-sided coated 45° beam splitter, which is used to reflect the fundamental frequency light generated by the first optical path and transmit the doubled frequency light generated by the second optical path.

[0011] In a preferred embodiment of the present invention, the frequency doubling crystal is selected from one or more of LBO, BIBO, BBO, PPKTP, PPLN or PPSLT, and the frequency doubling crystal is used to convert fundamental frequency light into frequency doubling light.

[0012] In a preferred embodiment of the present invention, the shaping lens is used to shape the fundamental frequency light and the doubled frequency light after the frequency doubling crystal into parallel light beams.

[0013] In a preferred embodiment of the present invention, the microlens array A and the microlens array B are both microlens arrays with quadrilateral arrangement, hexagonal arrangement or circular arrangement. The microlens array A is used to split the incident parallel light beam into multiple small light beams and focus these small light beams to different positions of the sum frequency crystal; the microlens array B is used to adjust the yellow laser light coming out of the beam splitter to make it into several beams of pulsed yellow laser light that propagate approximately in parallel.

[0014] In a preferred embodiment of the present invention, the sum frequency crystal is selected from one or more of LBO, BIBO, BBO, PPKTP, PPLN or PPSLT, and is used to receive multiple small light beams generated by the microlens array A, perform sum frequency conversion therein, and generate multiple beams of pulsed yellow laser.

[0015] In a preferred embodiment of the present invention, the multi-beam pulsed external laser system further includes an optical resonant cavity, which is disposed between the pump source and the laser crystal, and is used to enhance laser gain and maintain stable laser output.

[0016] In a preferred embodiment of the present invention, the optical resonant cavity includes an input coupling mirror, an intermediate reflecting mirror and an output coupling mirror.

[0017] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0018] (1) A first optical path, a second optical path and a beam splitter connecting the two are provided; wherein the first optical path is composed of a pump source, a laser crystal connected by a pump coupling system, and a back cavity mirror, and is used to generate and reflect fundamental frequency light to the beam splitter; the second optical path is composed of a frequency doubling crystal, a shaping lens, a microlens array A and a sum frequency crystal, and is used to convert the fundamental frequency light into a frequency doubling light, and split the light beam into a plurality of small light beams through the microlens array A and focus them on a wavelength conversion module, and after the conversion, turn to the sum frequency crystal to generate a plurality of pulsed laser beams inside the sum frequency crystal; in this process, the beam splitter reflects the fundamental frequency light and transmits the frequency doubling light and the finally generated laser beam; the microlens array A splits the incident parallel light beam into a plurality of small light beams, and focuses these small light beams on different positions of the sum frequency crystal, and directly generates a plurality of pulsed laser beams inside the sum frequency crystal; compared with the prior art, these multiple laser beams can be used for multi-point simultaneous processing, and the multiple laser beams can achieve faster and more precise material processing, greatly improving the processing efficiency.

[0019] (2) A double-sided coated 45° beamsplitter is used, which can reflect the fundamental frequency light into the subsequent processing steps and allow the doubled frequency light to pass through, thereby achieving effective separation and combination of light of different frequencies; using the same beamsplitter to process two different frequencies of light simplifies the system design; compared with the existing technology, the system design is simplified, the complexity and cost are reduced; the flexibility and applicability of the system are enhanced, and it can adapt to a variety of application scenarios and technical requirements; the quality and consistency of the output light beam are ensured to meet the needs of a variety of precision applications.

[0020] (3) An optical resonant cavity is arranged between the pump source and the laser crystal, and the optical resonant cavity includes an input coupling mirror, an intermediate reflection mirror and an output coupling mirror; the input coupling mirror has high transmittance to the pump light and high reflection to the fundamental frequency light, thereby ensuring that the pump light effectively enters the laser crystal; the intermediate reflection mirror has high reflection to the fundamental frequency light, thereby making the fundamental frequency light travel back and forth in the resonant cavity for many times, increasing the number of interactions between the photons and the active medium, thereby improving the laser gain; the output coupling mirror controls the final output laser power; compared with the prior art, the energy conversion efficiency is improved, the stability and reliability of the laser output are ensured, the fluctuation and noise are reduced, and a high-quality light source is provided for various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1is a schematic diagram of the connection structure of a preferred embodiment of the present invention; DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0027] like Figure 1 As shown, a multi-beam pulsed yellow laser system includes: a first optical path and a second optical path; a beam splitter connected to the first optical path and the second optical path, and a microlens array B connected to the beam splitter; the microlens array B is connected to the output port.

[0028] The first optical path includes a pump source, a laser crystal connected to the pump source via a pump coupling system, a back cavity mirror connected to the laser crystal, and the back cavity mirror connected to a beam splitter;

[0029] The second optical path includes a frequency doubling crystal, a shaping lens connected to the frequency doubling crystal, a microlens array A connected to the shaping lens, a wavelength conversion module connected to the microlens array A, a sum frequency crystal connected to the wavelength conversion module, and the sum frequency crystal is connected to the spectroscope.

[0030] Specifically, in the first optical path, the pump source provides the necessary energy to excite the laser crystal to generate fundamental frequency light.

[0031] The pump coupling system optimizes the energy transfer efficiency and ensures that the pump light can be fully absorbed by the laser crystal.

[0032] Laser crystal is a key component for generating fundamental frequency light, and different material selections can optimize the wavelength and power of laser output.

[0033] The rear cavity mirror reflects the fundamental frequency light back to the beam splitter, forming a closed optical path, ensuring that the light can travel back and forth multiple times in the resonant cavity, thereby enhancing the gain.

[0034] The spectroscope here can both reflect the fundamental frequency light into the subsequent processing steps and allow the doubled frequency light to pass through, thereby achieving effective separation and combination of light of different frequencies.

[0035] Specifically, in the second optical path, the frequency doubling crystal realizes a nonlinear optical process, converting the fundamental frequency light into a higher frequency doubled frequency light, while the shaping lens ensures the quality and uniformity of the light beam, so that the subsequent microlens array A can effectively split and parallelize these light beams in preparation for the sum frequency process.

[0036] The microlens array A is responsible for the division and focusing of the light beam, which increases the number and distribution density of the light beams, reduces the power density per unit area of ​​the sum frequency crystal, and reduces the risk of damage.

[0037] The sum frequency crystal is the core component for realizing the generation of multi-beam yellow laser. It converts multiple small beams into the required yellow laser through nonlinear optical effects.

[0038] More specifically, the core components of the wavelength conversion module include wavelength conversion crystals or fluorescent materials

[0039] Among them, wavelength conversion crystals are KTP (potassium titanyl phosphate) or PPLN (periodically poled lithium niobate), etc. These crystals can achieve nonlinear wavelength conversion under certain conditions. KTP crystals are often used for green light conversion, while PPLN crystals have a wider wavelength conversion range and tunability.

[0040] Fluorescent materials include quantum dots, organic dyes or inorganic fluorescent materials, which can absorb light of a specific wavelength and emit light of another wavelength. The choice of fluorescent materials depends on the required conversion wavelength and conversion efficiency.

[0041] What is more important to note is that the beam splitter is the intersection of two optical paths. The beam splitter reflects the fundamental frequency light in the first optical path into the subsequent processing steps, and filters out the excess fundamental frequency light and double frequency light in the second optical path to ensure that the final output is pure yellow laser.

[0042] Furthermore, the pump source is one or more of a semiconductor laser, a solid laser, a dye laser or a gas laser.

[0043] Among them, for the application of different pump sources, semiconductor lasers have high energy conversion efficiency and small size, which are suitable for integration into compact laser systems; solid-state lasers use solid-state media as gain media, common ones are Nd:YAG, Nd:YVO4, etc., which can generate high-power continuous wave or pulsed lasers, and are suitable for applications requiring high energy output; a notable feature of dye lasers is their high tunability, which can adjust the wavelength of the output laser by changing the type of dye or pumping conditions, and can produce wide-spectrum laser output, which is suitable for applications requiring multi-wavelength or multi-color lasers; gas lasers use gas as gain media, such as helium-neon lasers, carbon dioxide lasers, etc., which can generate high-power and high-brightness lasers, and are suitable for industrial processing, scientific research and other fields.

[0044] Furthermore, the laser crystal is selected from one or more of Nd:YVO4, Nd:YAG or Ti:sapphire, and the laser crystal is used to generate fundamental frequency light through energy provided by a pump source.

[0045] Specifically, after being excited by energy provided by a pump source (such as a flash lamp or a laser diode array), the laser crystal generates fundamental frequency light through a stimulated emission process, usually with a wavelength of 1064nm in the infrared region.

[0046] Furthermore, the beam splitter is a double-sided coated 45° beam splitter, which is used to reflect the fundamental frequency light generated by the first optical path and transmit the double frequency light generated by the second optical path.

[0047] Specifically, both surfaces of the beam splitter are specially coated. One side is coated with a film with high reflectivity for a specific wavelength (such as 1064nm fundamental frequency light), and the other side is coated with a film with high transmittance for other wavelengths (such as 532nm double frequency light). The beam splitter is placed at a 45° angle, and both sides are coated with reflection and transmission films optimized for different wavelengths to ensure reflection of the fundamental frequency light and transmission of the double frequency light.

[0048] More specifically, the spectrometer has a high reflectivity for the fundamental frequency light (such as 1064nm) generated by the first optical path, ensuring that these light beams can be correctly guided to the subsequent processing steps, and has a high transmittance for the doubled frequency light (such as 532nm) generated by the second optical path and the ultimately generated yellow laser (such as 570nm), ensuring that these light beams can pass smoothly and be output.

[0049] The beam splitter not only plays a key role in connecting the two optical paths, but also realizes the effective separation and combination of light of different frequencies in the entire system, ensuring the compactness and efficiency of the system. By precisely controlling the ratio of reflection and transmission, the beam splitter improves the energy efficiency of the entire system and reduces unnecessary energy loss. At the same time, using the same beam splitter to process two different frequencies of light simplifies system design and reduces complexity and cost.

[0050] It is worth noting that the generated fundamental frequency light is reflected by the rear cavity mirror and guided to the beam splitter 9. The beam splitter 9 has a high reflectivity for the 1064nm fundamental frequency light, ensuring that most of the fundamental frequency light can enter the subsequent optical path; at the same time, it has a high transmittance for the 532nm double frequency light, allowing the double frequency light to pass through without being affected.

[0051] Furthermore, the frequency doubling crystal is selected from one or more of LBO, BIBO, BBO, PPKTP, PPLN or PPSLT, and the frequency doubling crystal is used to convert fundamental frequency light into frequency doubling light.

[0052] Specifically, when the fundamental frequency light passes through the frequency doubling crystal 5, part of the 1064 nm light is converted into frequency doubling light with doubled frequency through the nonlinear optical effect. The remaining fundamental frequency light that has not been converted will also continue to move forward.

[0053] Furthermore, the shaping lens is used to shape the fundamental frequency light and the doubled frequency light after the frequency doubling crystal into parallel light beams.

[0054] Specifically, the plastic lens is composed of a single lens or multiple lenses, including a plano-convex lens, a biconvex lens, an aspheric lens, etc. The plastic lens material adopts high-transparency optical glass or other transparent media to minimize light loss and maintain good optical performance;

[0055] The main function of the shaping lens is to shape the fundamental frequency light and the doubled frequency light after the frequency doubling crystal into parallel beams, eliminate divergence, optimize the beam quality, and ensure that subsequent components (such as microlens array A) can evenly receive and process these beams, thereby improving the efficiency and beam quality of the entire system.

[0056] Furthermore, both microlens array A and microlens array B are microlens arrays with quadrilateral, hexagonal or circular arrangements. Microlens array A is used to split the incident parallel light beam into multiple small light beams and focus these small light beams on different positions of the sum frequency crystal; microlens array B is used to adjust the yellow laser light coming out of the beam splitter to make it into several beams of pulsed yellow laser light that propagate approximately in parallel.

[0057] Specifically, microlens array A and microlens array B are usually made of optical glass or other transparent media to ensure good optical performance and mechanical stability. At the same time, the surface is usually anti-reflective coating to reduce energy loss and improve transmission efficiency.

[0058] Regarding the different functions of microlens array A and microlens array B;

[0059] The microlens array A splits the incident parallel light beam into multiple small light beams, increasing the number and distribution density of the light beams, and focusing each small light beam to a different position on the sum frequency crystal, ensuring that each light beam can be effectively converted to a sum frequency in the sum frequency crystal: by dispersing the light beam, the power density per unit area of ​​the sum frequency crystal is reduced, reducing the risk of crystal damage.

[0060] The microlens array B adjusts the yellow laser light coming out of the beam splitter to make it into several beams of pulsed yellow laser light that propagate approximately in parallel, ensuring the quality and consistency of the output light beams and ensuring that each beam of yellow laser light has good parallelism and directionality, which is convenient for use in subsequent applications. By precisely controlling the direction and intensity of each beam of light, the stability and reliability of the entire system are improved.

[0061] Furthermore, the sum frequency crystal is selected from one or more of LBO, BIBO, BBO, PPKTP, PPLN or PPSLT, and is used to receive multiple small light beams generated by the microlens array A, perform sum frequency conversion therein, and generate multiple beams of pulsed yellow laser.

[0062] Specifically, choosing the right sum frequency crystal material can maximize the energy conversion efficiency and ensure the intensity and quality of the output yellow laser. The core function of the sum frequency crystal is to combine the 1064nm fundamental frequency light and the 532nm double frequency light for sum frequency conversion inside it to generate the required multi-beam pulsed yellow laser (such as 570nm). This process relies on nonlinear optical effects, which allows two or more low-frequency photons to combine to form a high-frequency photon.

[0063] The light beam is divided into multiple small light beams by the microlens array A and focused to different positions of the sum frequency crystal, which reduces the power density per unit area and reduces the risk of crystal damage.

[0064] Furthermore, a multi-beam pulsed external laser system also includes an optical resonant cavity, which is arranged between a pump source and a laser crystal. The optical resonant cavity is used to enhance laser gain and maintain stable laser output. The optical resonant cavity includes an input coupling mirror, an intermediate reflection mirror and an output coupling mirror.

[0065] Specifically, the optical resonant cavity is composed of an input coupling mirror, a first reflector (or intermediate reflector) and an output coupling mirror; the input coupling mirror is located between the pump source and the laser crystal, and has high transmittance to the pump light and high reflectivity to the fundamental frequency light, ensuring that the pump light can effectively enter the laser crystal, and at the same time reflects the generated fundamental frequency light back to the laser crystal for oscillation and amplification;

[0066] The first reflector (i.e., the middle reflector) is installed on one side of the laser crystal and is usually a plano-concave mirror. It has a high reflectivity to the fundamental frequency light and plays a reflective role, so that the fundamental frequency light travels back and forth inside the resonant cavity for many times, increasing the number of interactions between photons and the active medium, thereby improving the laser gain.

[0067] The output coupling mirror is located at the other end of the resonant cavity and has a certain transmittance to the fundamental frequency light, allowing part of the fundamental frequency light to be output as the actual laser beam, while reflecting the remaining fundamental frequency light to continue to oscillate in the cavity;

[0068] The design of the optical resonant cavity can be in the form of a three-mirror folded standing wave cavity, a two-mirror standing wave cavity or a "Z" type standing wave cavity, depending on the application requirements and technical parameter requirements.

[0069] When the present invention is used, the pump source (such as a semiconductor laser, a solid-state laser, etc.) is first started, and the energy is transferred to the laser crystal (such as Nd:YVO4, Nd:YAG or Ti:sapphire) through the pump coupling system to excite and generate fundamental frequency light. The fundamental frequency light is reflected by the rear cavity mirror to the double-sided coated 45° beam splitter, which reflects the fundamental frequency light and transmits the subsequent generated double frequency light. At the same time, in the second optical path, part of the fundamental frequency light is converted into double frequency light (for example, 532nm) by a double frequency crystal (such as LBO, BIBO, BBO, PPKTP, PPLN or PPSLT), and then shaped into parallel light beams by a shaping lens. The microlens array A divides these parallel light beams into multiple small light beams, which are converted and focused to different positions of the sum frequency crystal through a wavelength conversion module, and sum frequency conversion is performed to generate multiple pulsed yellow lasers. The same beam splitter filters out excess light again to ensure that only yellow laser light is transmitted. Finally, the microlens array B adjusts the yellow laser light to become several beams of pulsed yellow laser light that propagate approximately in parallel and outputs them through the output port.

[0070] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A multi-beam pulsed yellow laser system, characterized in that: include: A first optical path and a second optical path; a beam splitter connected to the first optical path and the second optical path, and a microlens array B connected to the beam splitter; The microlens array B is connected to the output port; The first optical path includes a pump source, a laser crystal connected to the pump source via a pump coupling system, a back cavity mirror connected to the laser crystal, and the back cavity mirror connected to the beam splitter; The second optical path includes a frequency doubling crystal, a shaping lens connected to the frequency doubling crystal, a microlens array A connected to the shaping lens, a wavelength conversion module connected to the microlens array A, a sum frequency crystal connected to the wavelength conversion module, and the sum frequency crystal is connected to the spectroscope.

2. A multi-beam pulsed yellow laser system according to claim 1, characterized in that: The pump source is one or more of a semiconductor laser, a solid laser, a dye laser or a gas laser.

3. A multi-beam pulsed yellow laser system according to claim 1, characterized in that: The laser crystal is selected from one or more of Nd:YVO4, Nd:YAG or Ti:sapphire, and the laser crystal is used to generate fundamental frequency light through energy provided by a pump source.

4. A multi-beam pulsed yellow laser system according to claim 1, characterized in that: The beam splitter is a double-sided coated 45° beam splitter, which is used to reflect the fundamental frequency light generated by the first light path and transmit the double frequency light generated by the second light path.

5. The multi-beam pulsed yellow laser system according to claim 1, characterized in that: The frequency doubling crystal is selected from one or more of LBO, BIBO, BBO, PPKTP, PPLN or PPSLT, and the frequency doubling crystal is used to convert fundamental frequency light into frequency doubling light.

6. A multi-beam pulsed yellow laser system according to claim 1, characterized in that: The shaping lens is used to shape the fundamental frequency light and the frequency doubling light after the frequency doubling crystal into parallel light beams.

7. The multi-beam pulsed yellow laser system according to claim 1, characterized in that: The microlens array A and the microlens array B are both microlens arrays arranged in a quadrilateral, hexagonal or circular pattern. The microlens array A is used to split an incident parallel light beam into a plurality of small light beams, and focus these small light beams onto different positions of a sum frequency crystal. The microlens array B is used to adjust the laser light coming out of the beam splitter to form a plurality of pulsed laser light beams that propagate approximately in parallel.

8. The multi-beam pulsed yellow laser system according to claim 1, characterized in that: The sum frequency crystal is selected from one or more of LBO, BIBO, BBO, PPKTP, PPLN or PPSLT, and is used to receive multiple small light beams generated by the microlens array A, perform sum frequency conversion inside it, and generate multiple pulsed yellow lasers.

9. The multi-beam pulsed yellow laser system according to claim 1, characterized in that: The multi-beam pulsed laser system further comprises an optical resonant cavity, which is arranged between the pump source and the laser crystal, and is used to enhance the laser gain and maintain stable laser output.

10. A multi-beam pulsed yellow laser system according to claim 9, characterized in that: The optical resonant cavity includes an input coupling mirror, an intermediate reflecting mirror and an output coupling mirror.

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