Linear plasma laser two-stage amplifier and its spectroscopic observation system

Abstract

The application discloses a linear plasma laser double-amplifier and a light-splitting observation system thereof, and belongs to the technical field of laser observation. The laser double-amplifier comprises a reflecting device, a laser amplification system, a laser light-splitting system and a laser observation system. The laser light-splitting system is arranged at a position where laser light is emitted after the laser light passes through a laser amplification medium. The laser light is reflected by a reflecting mirror and then passes through the laser amplification medium again to be amplified. The laser light is reflected by a compound curved mirror and then forms a linear light spot on a back-illuminated CCD camera. The application solves the technical problems of the prior art, such as being limited by space, having poor laser intensity gain and being difficult to observe.

Description

Technical Field

[0001] This invention relates to the field of laser generation, specifically to a linear plasma laser double amplifier and its spectroscopic observation system. Background Technology

[0002] X-ray lasers refer to X-ray free electron lasers. Under certain conditions, the upper and lower energy levels of laser emission from specific ions in a plasma column can form a population inversion. The emitted X-rays are amplified as they propagate along the plasma column to form X-ray lasers. This laser technology uses a solid or gaseous excitation medium as a carrier to excite electrons outside the atomic nucleus to a high energy level. The photons emitted when these electrons transition to a low energy level are used as the laser source. After passing through a resonant cavity to select the wavelength and make them coherent, the photons are emitted outside the laser to generate laser light.

[0003] The applicant has discovered that the prior art has at least the following technical problems:

[0004] 1. In existing technologies, X-ray lasers are typically generated using recombination plasma in laboratory settings. However, traditional recombination plasma methods are limited by space and cost, resulting in small-scale equipment, low intensity of the Nd:Yag laser guiding the plasma generation, and less than ideal intensity gain of the obtained X-ray laser. This presents significant drawbacks in terms of both economics and practicality.

[0005] 2. In the existing technology, the total output energy of such lasers is limited by the number of electrons in the medium, and it is difficult to observe the intensity and wavelength of high-intensity radiative lasers. Summary of the Invention

[0006] The purpose of this invention is to provide a linear plasma laser double amplifier and its beam splitting observation system to solve the technical problems of large space constraints, poor laser intensity gain, and difficulty in observation in the prior art.

[0007] To achieve the above objectives, the present invention provides a linear plasma laser double amplifier and its beam splitting observation system, comprising a reflection device, a laser amplification system, a laser beam splitting system, and a laser observation system. The reflection device and the laser amplification system are connected via a vacuum container, and the laser beam splitting system and the laser observation system are connected via a vacuum container.

[0008] Furthermore, the reflecting device consists of a reflective lens, a dual-axis adjuster, and a frame. The reflective lens is mounted on the frame, and the dual-axis adjuster is installed on the frame. The reflective lens on the frame is connected to the end of the vacuum container. The dual-axis adjuster, which is located on the frame and the reflective lens mounting position, is located outside the vacuum container.

[0009] Further, the reflecting lens is a circular plane reflecting lens structure with a MoSi coating layer on the surface.

[0010] Further, the laser amplification system is composed of an AL target and a laser amplification medium, the AL target is fixed at a position where laser enters the inside of the vacuum container one, and the AL target surface generates the laser amplification medium.

[0011] According to the linear plasma laser double amplifier and the light splitting observation system thereof, the laser splitting system is installed in the inside of the vacuum container two, and the laser splitting system is composed of a compound curved mirror and a slit, and the compound curved mirror is installed in front of the slit.

[0012] Further, the surface of the compound curved mirror is provided with a gold coating layer, and the sidewall of the compound curved mirror is in a rectangular structure.

[0013] Further, the compound curved mirror converts the received laser into laser propagating along a laser emission center and laser scattering along a longitudinal axis, and the laser propagating along the laser emission center passes through the center of the slit.

[0014] Further, the laser observation system is composed of a plane grating and a back-illuminated CCD camera, the plane grating receives the laser propagating along the laser emission center passing through the center of the slit, and the back-illuminated CCD camera directly receives the laser scattering along the longitudinal axis.

[0015] Further, the vacuum container one and the vacuum container two are connected through a stainless steel pipe, and a sealing ring is arranged at the flange connection position of the stainless steel pipe and the vacuum container one and the vacuum container two.

[0016] Based on the above technical scheme, the embodiment of the present application can at least produce the following technical effects:

[0017] 1. The linear plasma laser double amplifier and the light splitting observation system thereof provided by the present application, under the action of the double-axis adjuster, the X-ray laser is twice reflected by the circular plane reflecting lens with the MoSi coating layer and then amplified by the medium, so that the original laser and the reflected laser are overlapped in the light path, the X-ray laser intensity is enhanced, the X-ray laser amplification is improved, and the laser intensity gain is greatly improved.

[0018] 2. The linear plasma laser double amplifier and the light splitting observation system thereof provided by the present application, the reflecting mirror frame is directly connected with the vacuum container, so that the angle of the reflecting mirror can be adjusted outside the vacuum container, even if the laser amplification medium passage is very narrow, the reflected laser X-ray can also pass through and be amplified smoothly, the operation is simple and convenient, the adjustment is convenient, and the laser can be regenerated without space limitation.

[0019] 3. The linear plasma laser double amplifier and its spectroscopic observation system provided by the present invention wherein the laser from the laser amplification device is reflected by a composite curved mirror, and the laser is reflected to a 1200-slot flat grating or a back-illuminated CCD camera according to the direction of laser propagation. The laser entering the grating is reflected and the laser entering the CCD sensor through direct reflection merge to form a linear spot. The intensity of the linear spot is presented in the form of a spectrum, which facilitates direct observation and measurement of the relative intensity of the emitted laser and the amplified wavelength range. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the reflection device according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the laser amplification device according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the laser beam splitting system according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the laser observation system according to an embodiment of the present invention;

[0025] Figure 6 This is a rendering of the composite curved mirror according to an embodiment of the present invention;

[0026] In the diagram: 1. Reflecting mirror; 2. AL target; 3. Laser amplification medium; 4. Laser beam splitting system; 5. Dual-axis adjuster; 6. Frame; 7. Vacuum container one; 8. Reflecting device; 9. Composite curved mirror; 10. Slit; 11. Planar grating; 12. Back-illuminated CCD camera; 13. Stainless steel tube; 14. Sealing ring; 15. Vacuum container two; 16. Laser amplification device; 17. Laser observation system. Detailed Implementation

[0027] To better understand the purpose, structure, and function of this invention, the linear plasma laser double amplifier and its spectroscopic observation system of this invention will be described in further detail below with reference to the accompanying drawings.

[0028] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] As shown in the figure, the linear plasma laser double amplifier of the present invention includes a reflecting device 8, a laser amplification system 16, a laser beam splitting system 4, and a laser observation system 17. The reflecting device 8 and the laser amplification system 16 are connected through a vacuum container 7, and the laser beam splitting system 4 and the laser observation system 17 are connected through a vacuum container 15. The vacuum container 7 and the vacuum container 15 are connected by a stainless steel pipe 13. A sealing ring 14 is provided at the flange connection between the stainless steel pipe 13 and the vacuum container 7 and the vacuum container 15. The sealing ring 14 is made of rubber to increase the sealing degree of the container.

[0030] The reflecting device 8 consists of a reflective mirror 1, a dual-axis adjuster 5, and a frame 6. The reflective mirror 1 is a circular planar reflective mirror structure with a MoSi coating on its surface. The reflective mirror 1 is mounted on the frame 6 so that it can be fixed on the base plane to receive laser light. A dual-axis adjuster 5 is provided at the mounting position of the frame 6 and the reflective mirror 1 to adjust the reflection angle of the reflective mirror 1. In addition, the frame 6 is directly connected to the vacuum container 7, which enables the reflection angle of the reflective mirror 1 to be adjusted from outside the vacuum container 7.

[0031] The laser amplification system 16 consists of an AL target 2 and a laser amplification medium 3. The AL target 2 is fixed inside the vacuum container 7 at the laser injection point, and the laser amplification medium 3 is installed on the AL target 2. The reflector 1 and the laser beam splitting system 4 are respectively set at symmetrical positions in two directions of the AL target 2. The laser amplification medium 3 on the AL target 2 can amplify the absorbed laser and increase the transmission of energy. The laser used is a 15.14nm lithium aluminum ion X-ray. The laser is aimed at the AL target 2 and sent to it. The absorbed laser is dispersed in two directions by the laser amplification medium 3 into incident laser and reflected laser. The incident laser enters the laser beam splitting system 4 through a straight path, while the reflected light from the other direction enters the laser beam splitting system 4 through a detour. The reflected light first enters the reflector 1, and the reflection by the reflector 1 sends the reflected laser back into the laser amplification medium 3. After being amplified by the laser amplification medium 3, the reflected laser enters the laser beam splitting system 4. The optical paths of the incident laser and the reflected laser coincide to form the amplified laser.

[0032] The laser beam splitting system 4 is installed inside the vacuum container 15. The laser beam splitting system 4 consists of a composite curved mirror 9 and a slit 10. The composite curved mirror 9 is installed in front of the slit 10. The surface of the composite curved mirror 9 is coated with gold. The sidewall of the composite curved mirror 9 has a rectangular structure. The focusing effect of the composite curved mirror 9 is shown in the figure. The slit 10 can control the amount of laser light entering, thereby enabling the measurement of the relative intensity of the laser. Furthermore, the position of the slit can be used to determine the generation position of the linear plasma and the observation position of the laser observation system from both positive and negative directions. The composite curved mirror 9 converts the received laser light into laser light that propagates along the laser emission center and laser light that is scattered along the longitudinal axis. The laser light that propagates along the laser emission center passes through the center of the slit 10.

[0033] The optical observation system 17 consists of a planar grating 11 and a back-illuminated CCD camera 12. The planar grating 11 receives the laser beam that propagates along the laser emission center as it passes through the center of the slit 10. The laser beam that propagates along the laser emission center is uniformly distributed on the surface of the planar grating 12 and reflected to the back-illuminated CCD camera 12. The back-illuminated CCD camera 12 directly receives the laser beam scattered along the longitudinal axis. The laser beam that enters the planar grating 11 and propagates along the laser emission center is reflected to the back-illuminated CCD camera 12 and merges with the laser beam that is directly reflected into the back-illuminated CCD camera 12 and scattered along the longitudinal axis to form a linear light spot. The intensity of the linear light spot is presented in the form of a spectrum. The relative intensity of the emitted laser and the amplified wavelength range can be directly measured through the linear light spot.

[0034] The specific method of using this invention is as follows:

[0035] First, the linear plasma laser double amplifier and its beam splitting observation system are installed. The reflector 1 is installed on the frame 6 with the dual-axis adjuster 5. Then, the reflector 1 and the laser beam splitting system 4 are placed at the radial positions at both ends of the AL target 2. The reflector 1 on the frame 6 is connected to the end of the vacuum container 7. The frame 7 and the dual-axis adjuster 5 set on the mounting position of the reflector 1 are installed outside the vacuum container 7 to adjust the angle of the reflector 1.

[0036] A 15.47nm lithium aluminum ion X-ray laser is aimed at the axial position of the AL target 2 and directed toward the AL target 2. The emitted laser is amplified by the laser amplification medium 3 and emitted in two directions. The incident laser emitted in one direction directly enters the laser beam splitting system 4, while the reflected laser in the other direction is directed toward the reflective mirror 1. The angle of the reflective mirror 1 is adjusted by the dual-axis adjuster 5 set on the mirror frame 6 so that the reflected laser reflected by the reflective mirror 1 coincides with the incident laser light path that directly enters the laser beam splitting system 4.

[0037] By observation, when the two optical paths coincide, the dual-axis adjuster 5 adjusts the angle of the reflector 1 to a suitable position. Under the constraint of the vacuum container 7, even if the laser amplification medium 3 has a very narrow path, the reflected laser can pass through smoothly and be amplified again. At this time, the reflected laser is reflected by the reflector 1 and enters the laser amplification medium 3 again. After being amplified and strengthened by the laser amplification medium 3, it enters the laser beam splitting system 4.

[0038] When two optical paths are implemented simultaneously, the incident laser is amplified once by the laser amplification medium 3, and the reflected laser is amplified twice by the laser amplification medium 3 under the action of the reflective mirror 1. This achieves multiple amplifications of the X-ray laser in a small space, making full use of the initial laser energy and achieving the effect of converging laser amplification of the two optical paths, thus improving the economic efficiency and practicality of the device.

[0039] After receiving the amplified laser beam, the laser beam splitting system 4 converts the amplified laser beam into a laser beam that propagates along the laser emission center and a laser beam that is scattered along the longitudinal axis by the composite curved mirror 9. The laser beam that propagates along the laser emission center passes through the center of the slit 10 and is uniformly distributed on the surface of the planar grating 12 and reflected to the back-illuminated CCD camera 12. The laser beam that is scattered along the longitudinal axis is reflected by the composite curved mirror 9 and directly focused onto the back-illuminated CCD camera 12. The laser beam that propagates along the laser emission center and enters the planar grating 11 is reflected to the back-illuminated CCD camera 12 and merges with the laser beam that is directly reflected into the back-illuminated CCD camera 12 and scattered along the longitudinal axis to form a linear light spot. The intensity of the linear light spot is presented in the form of a spectrum. The relative intensity of the emitted laser and the amplified wavelength range can be directly measured through the linear light spot.

[0040] It is understood that, as described through some embodiments, various changes or equivalent substitutions can be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, modifications can be made to these features and embodiments to adapt to specific circumstances and materials without departing from the spirit and scope of the invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this invention.

Claims

1. A linear plasma laser double amplifier and its beam splitting observation system, comprising a reflecting device (8), a laser amplification system (16), a laser beam splitting system (4), and a laser observation system (17), characterized in that, The reflector (8) and the laser amplification system (16) are connected through vacuum container one (7), and the laser beam splitting system (4) and the laser observation system (17) are connected through vacuum container two (15). The reflective device (8) consists of a reflective lens (1), a dual-axis adjuster (5) and a frame (6). The reflective lens (1) is mounted on the frame (6), and the dual-axis adjuster (5) is mounted on the frame (6). The reflective lens (1) on the frame (6) is connected to the end of the vacuum container (7). The dual-axis adjuster (5) provided on the frame (6) and the reflective lens (1) is located outside the vacuum container (7). The laser amplification system (16) consists of an AL target (2) and a laser amplification medium (3). The AL target (2) is fixed inside the vacuum container (7) at the laser injection position, and the laser amplification medium (3) is generated on the surface of the AL target (2). The laser beam splitting system (4) is installed inside the vacuum container (15). The laser beam splitting system (4) is composed of a composite curved mirror (9) and a slit (10). The composite curved mirror (9) is installed in front of the slit (10). The laser observation system (17) consists of a planar grating (11) and a back-illuminated CCD camera (12). The planar grating (11) receives the laser beam that propagates along the laser emission center as it passes through the center of the slit (10). The back-illuminated CCD camera (12) directly receives the laser beam that is scattered along the longitudinal axis. The system's operation process includes: The laser is aimed at the axial position of the AL target (2) and shot towards the AL target (2). The emitted laser is amplified by the laser amplification medium (3) and shot out in two directions. The incident laser shot out in one direction directly enters the laser beam splitting system (4), and the reflected laser in the other direction is shot towards the reflective lens (1). The angle of the reflective lens (1) is adjusted by the dual-axis adjuster (5) set on the lens frame (6) so that the reflected laser reflected by the reflective lens (1) coincides with the incident laser light path that directly enters the laser beam splitting system (4). When the two optical paths coincide, the dual-axis adjuster (5) adjusts the angle of the reflector (1) to a suitable position. Under the constraint of the vacuum container (7), even if the laser amplification medium (3) of the laser is very narrow, the reflected laser can pass through smoothly and be amplified again. At this time, the reflected laser is reflected by the reflector (1) and enters the laser amplification medium (3) again. After being amplified and strengthened by the laser amplification medium (3), it enters the laser beam splitting system (4). After receiving the amplified laser beam, the laser beam splitting system (4) converts the amplified laser beam into a laser beam that propagates along the laser emission center and a laser beam that is scattered along the longitudinal axis by the composite curved mirror (9). The laser beam that propagates along the laser emission center passes through the center of the slit (10) and is uniformly distributed on the surface of the planar grating (11) and reflected to the back-illuminated CCD camera (12). The laser beam that is scattered along the longitudinal axis is reflected by the composite curved mirror (9) and directly focused onto the back-illuminated CCD camera (12). The laser beam that propagates along the laser emission center and enters the planar grating (11) is reflected to the back-illuminated CCD camera (12) and merges with the laser beam that is directly reflected into the back-illuminated CCD camera (12) and scattered along the longitudinal axis to form a linear light spot. The intensity of the linear light spot is presented in the form of a spectrum. The relative intensity of the emitted laser and the amplified wavelength range can be directly measured through the linear light spot.

2. The linear plasma laser double amplifier and its spectroscopic observation system according to claim 1, characterized in that, The reflective mirror (1) is a circular planar reflective mirror structure with a MoSi coating on its surface.

3. The linear plasma laser double amplifier and its spectroscopic observation system according to claim 1, characterized in that, The surface of the composite curved mirror (9) is coated with gold, and the sidewalls of the composite curved mirror (9) are rectangular.

4. The linear plasma laser double amplifier and its spectroscopic observation system according to claim 2, characterized in that, The composite curved mirror (9) converts the received laser into a laser that propagates along the laser emission center and a laser that is scattered along the longitudinal axis. The laser that propagates along the laser emission center passes through the center of the slit (10).

5. The linear plasma laser double amplifier and its spectroscopic observation system according to claim 1, characterized in that, The vacuum container one (7) and the vacuum container two (15) are connected by a stainless steel pipe (13), and a sealing ring (14) is provided at the flange connection between the stainless steel pipe (13) and the vacuum container one (7) and the vacuum container two (15).

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