59 results about "Laser amplifiers" patented technology

A laser device according to one embodiment includes a laser light source configured to output pulsed laser light L1 and a pulse width control unit configured to amplify the pulsed laser light output from the laser light source, change a pulse width of the pulsed laser light, and output the pulsed laser light. The pulse width control unit includes a first laser amplifier configured to amplify the pulsed laser light and a pulse waveform manipulation unit disposed between the first laser amplifier and the laser light source and configured to manipulate a pulse waveform of the pulsed laser light.

The invention relates to the field of semiconductor device and integrated circuit research, in particular to a semiconductor device dose rate effect laser simulation system. Multiple wavelengths and a wide energy range are achieved through the optical fiber laser pulse seed source assembly and the solid laser amplifier assembly, the pulse width can range from 1 ns to 100 microseconds, variable complex waveforms such as square waves, rectangular waves, sine waves and pulse strings are achieved, and pulse laser with the energy range from the nanojoule level to the joule level and adjustable wavelengths and waveforms can be output according to requirements. The high-low energy laser adopts a common-path design, so that the system integration degree is improved; light spots are adjustable from centimeter level to micron level, and global irradiation and micro-area positioning and scanning of an irradiation sample can be realized. According to the invention, dose rate effects under different conditions can be accurately and flexibly simulated, the blank of a high-energy, variable-waveform and multi-wavelength dose rate effect laser simulation system is filled up, and an efficient solution is provided for the reliability research of devices under a complex irradiation environment.

The invention provides an electromagnetic field constraint system and constraint method for a CO2 laser amplifier, and the system comprises a spiral electrode which is wound on a discharge tube of the CO2 laser amplifier, the spiral electrode comprises a first DC positive electrode, a radio frequency positive electrode, a second DC positive electrode and a ground electrode which are sequentially and adjacently arranged, and the current flows through the first DC positive electrode in the electric field direction from the first DC positive electrode to the ground electrode. The electric field direction of the current from the second direct current positive electrode to the ground electrode is partially perpendicular to the electric field direction of the current from the radio frequency positive electrode to the ground electrode; the CO2 laser amplifier discharge tube and the Helmholtz coil are coaxially arranged, and the magnetic field direction of the Helmholtz coil is perpendicular to the electric field direction from the radio frequency positive electrode to the ground electrode. In the discharge area of the CO2 laser amplifier, the strong electromagnetic field restraint system is adopted, the vertical alternating high-voltage electric field and the vertical alternating high-voltage magnetic field are used for restraining plasma movement, the electro-optical conversion efficiency can reach about 20%, the CO2 laser power can be effectively improved, and the arc discharge problem under the high radio frequency power injection condition is avoided.

A laser device includes an oscillator outputting pulse laser light; an amplifier amplifying the pulse laser light; an optical pulse stretcher extending a pulse width of the pulse laser light; a beam divergence angle adjuster including an upstream lens arranged on an optical path of the pulse laser light, a downstream lens arranged downstream of the upstream lens, and an optical path length changing mechanism for changing an inter-lens optical path length between the upstream lens and the downstream lens; and a processor controlling the beam divergence angle adjuster and obtaining a repetition frequency or a duty of the pulse laser light, and to change, when the repetition frequency or the duty changes by a preset threshold or more, the inter-lens optical path length so that the beam divergence angle of the extended pulse laser light becomes small in accordance with the repetition frequency or the duty after the change.

The application discloses a multi-pass disk laser amplifier, which comprises a near end and a far end, a pump laser beam, a seed laser beam, a first parabolic mirror, a second parabolic mirror, a laser gain medium, a first deflection optical prism group and a second deflection optical prism group, wherein the laser gain medium comprises a medium reflection surface; the pump laser beam located at the near end is aligned to the first parabolic mirror located at the far end for incidence through a first beam collimator; and the seed laser beam located at the near end is aligned to the second parabolic mirror located at the far end for incidence after passing through a second beam collimator. Compared with a conventional multi-pass disk laser amplifier, the application has a simpler structure, a shorter amplification optical path, a more compact volume and higher system stability. Furthermore, by changing the structure of the design prism of the pump light path, 12-pass, 24-pass, 36-pass, 48-pass and other multi-pass amplifications can be realized.

The invention discloses a Raman beam combination laser amplifier, relates to the technical field of laser, and aims to solve the problem of low conversion efficiency of an existing beam combination laser amplifier. A first bowl-shaped reflecting mirror and a second bowl-shaped reflecting mirror are coaxially arranged at the two ends of a columnar reflecting mirror assembly, the concave surfaces face the columnar reflecting mirror assembly, and a Raman laser crystal is arranged in the columnar reflecting mirror assembly; seed light output by the seed light module enters the Raman laser crystal through the center of the first bowl-shaped reflector; and a plurality of beams of fundamental frequency light output by the plurality of fundamental frequency light modules are obliquely incident to the Raman laser crystal from the side surface of the columnar reflector assembly. Each beam of fundamental frequency light of the Raman beam combination laser amplifier can be reflected for multiple times in the amplifier and interacts with the seed light for multiple times, the conversion efficiency of the single beam of fundamental frequency light is improved, the adjustment difficulty of the fundamental frequency light module is low, and the Raman beam combination laser amplifier is suitable for integrated use.

The invention discloses a 2-micron short-period laser amplifier based on a thulium-doped positive dispersion fluorotellurite optical fiber, which can solve the problem that a negative dispersion thulium-doped optical fiber is not suitable for performing gain management nonlinear amplification on a 2-micron pulse, and can obtain a pulse width lt. 50 fs, and single pulse energy gt; the femtosecond laser output device has the advantages of being full-fibrillated and compact in structure. The 2-micron femtosecond seed source is femtosecond pulse laser of a 2-micron wave band generated based on nonlinear amplification loop mirror mode locking; the chirped pulse amplifier is used for obtaining sub-picosecond 1.9 mu m femtosecond laser output with the average power greater than or equal to 1W; the optical fiber GMN amplifier is used for obtaining a few-period femtosecond pulse; the high-power optical fiber pulse compressor is a hollow-core optical fiber and is used for carrying out accurate dispersion compensation and high-quality pulse compression.

The application provides a kind of laser amplifier control system and method, the system includes the seed source, amplifier, phase modulator, nonlinear frequency conversion module and dichroic mirror arranged in sequence on optical path;The light output by nonlinear frequency conversion module is divided into two ways through dichroic mirror, one of which is used as system output light, and the direction of the other light path is provided with optical garbage bin;Adjust the phase modulator, so that the polarization direction of laser matches the nonlinear frequency conversion module, the system output light is the light after nonlinear frequency conversion, and the other way of fundamental light is recycled by optical garbage bin;Otherwise, the nonlinear frequency conversion module only outputs the fundamental light.By using the application, whether there is system output light, laser always passes through the crystal in nonlinear frequency conversion module, and the crystal will not exist the temperature drift caused by selective laser passing, to ensure the stability of system output light.

A mid-infrared laser generation system based on dispersion-managed soliton bunch pulses. The system can achieve high-power, high-efficiency and high-proportion mid-infrared laser output, and has the advantages of an all-fiber configuration, a compact structure and a high power proportion in a longer-wavelength region of a mid-infrared spectrum. A pulsed fiber laser device generates a nanosecond pulse laser in a 1.5-micron band. A fiber pulse stretcher is made of a single-mode silica fiber, splits nanosecond pulses into a plurality of ultrafast soliton pulses by means of a nonlinear effect, and performs spectral energy conversion from 1.5 microns to 2.4 microns. A fiber laser amplifier further increases the output power of a stretched pulse laser and extends a spectrum to a 2.7-micron band, and also increases pulse energy beyond a 2.3-micron band. A fiber mode field adapter efficiently couples into a nonlinear fiber pulses generated in the fiber laser amplifier. The nonlinear fiber extends a laser to a mid-infrared 3-5-micron band, thereby achieving high-power, high-efficiency and high-proportion mid-infrared laser output.

This application belongs to the field of laser amplification technology and provides a beam-actively controlled disk laser amplifier, comprising: a disk crystal for laser amplification; a seed light source for providing a polarized seed laser to be amplified, the seed laser having a first diameter spot at the disk crystal, and the size of the first diameter spot being dynamically adjustable; a pumping device for pumping the disk crystal, the pump light emitted by the pumping device having a second diameter spot at the disk crystal; and a spot adjustment component for dynamically adjusting the size of the first diameter spot, so that the ratio of the first diameter spot to the second diameter spot is within a preset range. This application uses a spot analysis device to monitor the diameter of the output seed amplified laser spot and uses a surface shape adjustment mirror to calibrate the spot diameter of the seed light in real time, thereby achieving a stable output spot diameter from low to high pump power and under power fluctuations, thus ensuring the stability of the output laser power and beam quality.

A high-power fiber laser array includes a pump module array, a pump fiber array, a resonant cavity module array or a power amplifier module array, and a power transfer fiber array. The pump module array, resonant cavity module array, or power amplifier module array are arranged separately, and connected to each other via the pump fiber array. The fiber laser resonators forming the resonant cavity module array are arranged as closely as possible in a linear array, or the fiber laser amplifiers forming the power amplifier module array are arranged as closely as possible in a linear array, thereby shortening the length of the power transfer fiber between each fiber laser resonator or fiber laser amplifier and the beam combining device. This specification can effectively shorten the length of the power transfer fiber in fiber laser array combining, improving the output power and stability of a single fiber laser oscillator or power amplifier.

This invention provides a method for controlling ASE (Alternating Escalation) in a laser amplifier, comprising the following steps: configuring a controllable resonant cavity sharing the gain medium with the laser amplifier; and modulating the loss of the controllable resonant cavity to allow the gain medium to store and amplify the signal light during the signal light incident phase, and to rapidly release the remaining energy at the end of the signal light phase, so that the gain is below the ASE generation threshold, thereby suppressing ASE generation at its source. This invention actively regulates the energy state of the gain medium, releasing excess stored energy before ASE generation, ensuring the gain remains below the ASE generation threshold, thus eradicating ASE at its generation mechanism. Compared to the traditional passive attenuation method after ASE generation, this method eliminates signal light loss, provides more thorough suppression, and offers a faster response, making it suitable for various pulsed laser amplifier systems. Furthermore, the controllable resonant cavity shares the same gain medium with the laser amplifier, eliminating the need for additional gain modules, resulting in a simpler optical path, higher integration, and significantly reduced system complexity and hardware costs.

The invention discloses a method for measuring the thermal conversion coefficient of an end-pumped rod-shaped MOPA laser amplifier, and the method comprises the steps: placing a ZnSe reflector on the front end surface of a crystal at an angle of 45 degrees, and reflecting a pumping light beam and a signal light beam to be amplified into the crystal, so as to simulate the actual working state of the laser amplifier; a thermal infrared imager is placed behind the ZnSe reflector and faces the front end face of the crystal, and the temperature of the end face of the crystal is measured and collected; constructing a crystal steady-state temperature field equation containing a thermal conversion coefficient, wherein the equation is used for calculating crystal temperature distribution; and performing similarity calculation on the obtained crystal temperature distribution and the measurement result of the thermal infrared imager by continuously adjusting the value of the thermal conversion coefficient until the similarity reaches a set threshold value, thereby obtaining the final thermal conversion coefficient. The method can be embedded into a designed light path of the laser amplifier, and it is ensured that the measured value conforms to the actual working condition of the laser amplifier.

The invention, which relates to the technical field of ultrafast laser, discloses a multi-disc multi-pass ultrafast laser amplification system comprising a first grating assembly, a first laser adjustment assembly, a multi-disc gain assembly, a second laser adjustment assembly and a second grating assembly which are arranged in sequence. A plurality of disc crystals of the multi-disc gain assembly are arranged at equal intervals to form a gain area; the first laser turn-back mirror and the second laser turn-back mirror are oppositely arranged on two sides of the multi-disc gain assembly and are used for reflecting the pulse laser distributed in the strip shape for multiple times to pass through a gain area of the multi-disc gain assembly; the first pump light coupling mirror and the second pump light coupling mirror are oppositely arranged on the two sides of the multi-disc gain assembly and used for coupling the input collimated rectangular pump light to a gain area of the multi-disc gain assembly. The first grating assembly and the second grating assembly form a chirped pulse compressor. According to the invention, the problem that the laser and the pump light are difficult to fully realize spatial overlapping in a gain region is solved, and the energy of the laser amplifier is effectively extracted.

The application discloses a full-fiber structure laser amplifier of a multi-core optical fiber, relates to the technical field of optical systems, and comprises an injection optical fiber, a beam splitting waveguide, a phase controller, an amplification device, a beam combining waveguide and an end cap. The injection optical fiber is used for injecting input laser into the beam splitting waveguide to form a beam splitting laser array. The beam splitting laser array is phase controlled by the phase controller and then transmitted to the amplification device for amplification processing. The amplification device outputs amplified amplification laser array to the beam combining waveguide. The beam combining waveguide combines the amplification laser array to obtain beam combining laser. The beam combining laser is expanded by the end cap to generate output laser. The scheme provided by the application can improve the stability of the laser amplification process.

The invention discloses a laser amplifier and a method for avoiding thermal depolarization of a side pump. According to an exemplary embodiment, a laser amplifier comprises: a vector polarization conversion device for converting linearly polarized light into light in a single vector polarization state; and a side pump module for amplifying the light incident on the side pump module. According to the technical scheme provided by the invention, only one vector polarization component exists in the module through the polarization conversion device, and thermal depolarization does not occur in single radial or angular vector polarization under cylindrical symmetric anisotropic refractive index distribution, so that thermal depolarization does not occur no matter whether a light beam passes through a crystal rod for one time or multiple times, and therefore, the reliability of the module is improved. Therefore, the influence of the thermal depolarization effect of the side pump module on the polarization state of the light beam is reduced, and the amplification quality of the high-energy picosecond laser and the stability of an amplification system are improved.

A laser amplifier for a green laser pulse includes at least one gain medium doped with praseodymium and at least one gallium nitride based diode laser for pumping the gain medium. A green seed laser pulse going through the gain medium becomes an amplified green laser pulse.

The invention discloses an all-fiber structure laser amplifier of a multi-core optical fiber, and relates to the technical field of optical systems.The laser amplifier comprises an injection optical fiber, a beam splitting waveguide, a phase controller, an amplifying device, a beam combining waveguide and an end cap, the injection optical fiber is used for enabling input laser to be injected into the beam splitting waveguide to form a beam splitting laser array, and the phase controller is used for controlling the phase controller; after being subjected to phase control by the phase controller, the beam splitting laser array is transmitted to the amplification device for amplification processing; the amplifying device outputs the amplified laser array to the beam combining waveguide, and the beam combining waveguide synthesizes the amplified laser array to obtain combined laser; and after the combined laser is expanded by the end cap, output laser is generated. By applying the scheme provided by the embodiment of the invention, the stability of the laser amplification process can be improved.

The invention relates to a clamping device for a laser amplifier, and relates to the technical field of clamping devices. The device comprises a limiting frame, a buffer bag and a frequency flow adjusting piece, the limiting frame is formed by two U-shaped frames in a butt joint and surrounding mode, a cavity is formed in each U-shaped frame, liquid is contained in the cavity, a partition piece is arranged in the cavity and divides the cavity into a plurality of sub-cavities, communicating holes for communicating the sub-cavities on the two sides of the partition piece are formed in the partition piece, and the frequency flow adjusting piece is arranged in the cavity. A ball body is arranged in each sub-chamber; each U-shaped frame is provided with a buffer bag, and the buffer bags are communicated with the cavities of the U-shaped frames; and the frequency flow adjusting piece is configured to be capable of changing the flow between the cavity of the U-shaped frame and the buffer bag in response to the change of the vibration frequency of the laser amplifier. The flow can be adjusted according to the vibration frequency through the frequency flow adjusting piece, and the U-shaped frame partition piece and the ball work cooperatively, so that the whole clamping device can adapt to different vibration environments, and the stability of the laser amplifier is guaranteed.

The application relates to the field of laser technology and provides a disc crystal-based laser amplifier, which comprises: each pair of right-angle prisms comprises a first right-angle prism and a second right-angle prism, the first right-angle prism and the second right-angle prism are respectively located on the two sides of an optical axis, the light-out surface of the second right-angle prism in the front pair of right-angle prisms is oppositely arranged with the light-in surface of the first right-angle prism in the rear pair of right-angle prisms, so that the light rays pass through the multiple pairs of right-angle prisms in sequence; a first parabolic mirror is oppositely arranged with the multiple pairs of right-angle prisms; a disc crystal amplification module is located at the focal point of the first parabolic mirror; the first parabolic mirror is used for reflecting the light rays passing through the first right-angle prism to the disc crystal amplification module for amplification gain, and reflecting the light rays reflected by the disc crystal amplification module to the second right-angle prism. The disc crystal-based laser amplifier can make the light rays pass through the disc crystal amplification module multiple times for amplification gain, and thus the average power of the light ray output is improved.

The invention provides a disc-type regenerative laser cavity for a laser amplifier, a disc-type laser and a laser amplification method. According to the disc-type regeneration laser cavity for the laser amplifier, the disc-type laser and the laser amplification method, laser oscillation is formed on the same disc-type crystal at the same time through two beams of laser with different spatial orientations of the main resonant cavity and the auxiliary resonant cavity, redundant pump light energy of the main cavity can be extracted by adjusting optical parameters of the auxiliary cavity, and the laser amplification efficiency is improved. The thermal pressure of the disc is reduced, and laser pulse energy of the main cavity is shaken and stripped to the auxiliary cavity, so that the laser pulse power output by the main cavity is more stable, the light beam quality is better, and the light beam directivity is more stable.

A cutting device includes a carrier substrate and a laser generating module. The laser generating module includes a pulsed laser generating module, an acousto-optic modulator and a laser amplifier. The pulsed laser generating module is configured to generate a laser light source. The acousto-optic modulator is configured to increase a repetition frequency of the laser light source and generate a pulsed laser beam having a plurality of pulse trains based on the laser light source with the increased repetition frequency. The laser amplifier is configured to increase a pulse energy of the pulsed laser beam. When the pulsed laser beam with the pulse trains is projected onto the composite material, a plurality of cutting areas or drilling holes are formed on the composite material by the pulsed laser beam with the pulse trains. Each pulse train of the pulsed laser beam includes a plurality of pulse signals.

The invention belongs to the technical field of fiber laser, and particularly discloses a non-linear effect limitation-free high-beam-quality fiber laser amplifier, which comprises a seed light source for generating seed signal light with a preset central wavelength; the pre-amplification stage is used for performing first-stage power amplification on the seed signal light; the main power amplification stage is used for performing second-stage high-power amplification on the pre-amplified signal light; the output and transmission stage is used for carrying out output and long-distance transmission on the signal light subjected to main power amplification; wherein the main power amplification stage comprises an active hollow-core anti-resonance optical fiber and a pumping coupler used for injecting pumping light into the active hollow-core anti-resonance optical fiber, and the active hollow-core anti-resonance optical fiber is a multi-ring hollow anti-resonance optical fiber internally provided with a multi-ring structure. According to the invention, the non-linear problem of a high-power laser amplifier is fundamentally solved while high beam quality output of the laser amplifier is maintained.

The invention discloses a high-gain 1.6 [mu] m small-signal optical fiber laser amplifier which is characterized in that small-signal seed light with the power of 500 [mu] W emitted by a seed source is injected into a 1570 nm laser resonant cavity through a first isolator and a cladding light stripper, and 980 nm pump light emitted by a pump source is coupled into the 1570 nm laser resonant cavity through a pump coupling device; the 1570 nm laser resonant cavity is composed of a first resonant cavity feedback device, a first active optical fiber and a second resonant cavity feedback device, and the first active optical fiber absorbs pump light energy and provides gain for generation of 1570 nm laser and preliminary amplification of small-signal seed light; residual pump light is filtered by a cladding light stripper, and generated 1570 nm laser and small signal seed light preliminarily amplified by the first active optical fiber pass through a second isolator and then are jointly injected into a fiber core of a second erbium-ytterbium co-doped active optical fiber; the second active optical fiber absorbs 1570 nm laser energy to excite erbium ions to a 4I13 / 2 energy level, gain is provided for signal light power amplification, and amplified signal light is output at the tail end of the second active optical fiber.

The application relates to a clamping device for a laser amplifier and relates to the technical field of clamping devices. The clamping device comprises a limiting frame, a buffer bag and a frequency flow adjusting element. The limiting frame comprises two U-shaped frames which are connected to each other to form a whole, a cavity is arranged in the U-shaped frame, a liquid is filled in the cavity, a partition is arranged in the cavity, the cavity is divided into multiple sub-chambers by the partition, a communication hole for communicating the sub-chambers on the two sides of the partition is arranged on the partition, and a ball is arranged in each sub-chamber. One buffer bag is arranged for each U-shaped frame, and the buffer bag is communicated with the cavity of the U-shaped frame. The frequency flow adjusting element is configured to change the flow size between the cavity of the U-shaped frame and the buffer bag in response to the change of the vibration frequency of the laser amplifier. According to the application, the frequency flow adjusting element can realize the flow adjustment according to the vibration frequency, and the U-shaped frame partition and the ball work cooperatively, so that the whole clamping device can adapt to different vibration environments and guarantee the stability of the laser amplifier.

The invention relates to the field of ultrafast laser technology and high-energy laser physics, in particular to a femtosecond laser amplifier time synchronization device utilizing fast and slow loop feedback, which comprises a laser oscillator used for generating femtosecond pulse laser with repetition frequency locked; the amplifier is used for receiving and amplifying the femtosecond pulse laser; the optical beam splitting component is used for splitting the output of the laser oscillator into a transmission light beam and a reflection light beam; the first delay line is used for providing slow loop feedback compensation so as to compensate for long-term time drift; the second delay line is used for providing fast loop feedback compensation so as to compensate for fast time drift; the balance optical cross-correlation assembly is used for receiving the reference light and the light beam output from the second delay line and generating an error signal representing time drift; and the active control assembly is used for controlling the electric control displacement table and the piezoelectric ceramics to realize time sequence synchronization between the laser oscillator and the amplifier. The method can improve the precision of controlling laser pulse time sequence synchronization of the oscillator and the amplifier.

The embodiment of the application relates to the technical field of laser equipment, and discloses a laser amplifier and a laser device, the laser amplifier comprising: a slab crystal assembly and a mirror; the slab crystal assembly is used for making a seed light beam incident to the slab crystal assembly to perform forward zigzag transmission to perform first round amplification and then emit; the mirror is arranged on one side of the slab crystal assembly, a reflecting surface of the mirror is configured as an ellipsoidal surface, and the mirror is used for reflecting the seed light beam emitted after the first round amplification back to the slab crystal assembly; and the slab crystal assembly is further used for making the seed light beam reflected by the mirror perform reverse zigzag transmission to perform second round amplification and then emit from the slab crystal assembly. Through the above mode, the embodiment of the application meets the miniaturization requirement of the laser amplifier, and obtains a laser beam with higher gain.

The application discloses a low-repetition-frequency optical fiber laser amplifier pump light time-sharing and light-splitting device. The device comprises a pump source, a fiber acousto-optic modulator, a plurality of laser systems and a control unit. The pump source is used for generating pump light; the fiber acousto-optic modulator is connected with the output end of the pump source and is used for receiving the pump light and realizing time-sharing and light-splitting; the plurality of laser systems are respectively connected with the light-splitting output ends of the fiber acousto-optic modulator to form respective light-splitting branches and are used for receiving time-sharing pump light and performing laser amplification; and the control unit is connected with the fiber acousto-optic modulator and is used for controlling the time-sharing and light-splitting operation of the fiber acousto-optic modulator according to a preset time sequence. The device structure in the technical scheme of the application is relatively simple, easy to realize and integrate, the pump light is time-shared and light-split by the acousto-optic modulator, the ASE during the fiber laser amplification can be obviously inhibited, the beam quality and power stability of the laser output are improved, and the reasonable distribution and efficient utilization of the pump light in the plurality of laser systems can be realized.

The application discloses a kind of laser amplifiers, it is related to the field of laser technology, including: seed source, convex lens, first reflector, second reflector, optical isolator, polaroid, laser beam expander, cylindrical lens, slab crystal, heat sink, pump mirror, 1 / 4 wave plate, third reflector, first pump coupler, second pump coupler, first pump source and second pump source;First pump coupler is used to focus the pump light generated by first pump source on slab crystal to amplify laser power;Second pump coupler is located on the side of slab crystal, and the distance from slab crystal is adjustable, for adjusting the heat distribution in slab crystal based on the pump light generated by second pump source.The application can improve the energy and beam quality of amplified laser.

This invention discloses a method for precisely adjusting the spatial attitude of a heavy-duty laser amplifier enclosure for controlled nuclear fusion, comprising the following steps: setting a reference point outside the enclosure; acquiring the coordinates of key internal dimensions and the external reference point, and converting the relative positions of the key internal dimensions to the external reference point; recording the data; adjusting the enclosure according to the external reference point during installation to position the interior of the enclosure; and correcting the shape of the enclosure based on the position of the external reference point. This method achieves a precise correlation between the virtual straightness and height inside the sheet amplifier enclosure and the external reference point, allowing assembly and positioning to be completed without entering the enclosure. It effectively avoids assembly reference offsets in the internal positioning control laser circuit, ensuring that the optical path calibration accuracy meets the stringent requirements of a high-power laser drive system for controlled nuclear fusion. It ensures that key internal features are locked in standard positions after the enclosure is restored, simplifies data acquisition and processing, and guarantees that the test results match the actual assembly conditions.