146 results about "Laser amplifiers" patented technology

A high-power single-frequency laser amplifier based on prepared YAG derivative optical fibers comprises a single-frequency optical fiber laser seed source, the output end of the single-frequency optical fiber laser seed source is connected with the input end of a first-stage pre-amplifier, and the output end of the first-stage pre-amplifier is connected with the input end of a second-stage pre-amplifier. The output end of the secondary preamplifier is connected with the input end of the high-power double-cladding circulator, and the output end of the high-power double-cladding circulator is connected with a signal light input port of the high-power pumping signal beam combiner. The output end of the high-power pumping signal beam combiner is connected with one end of a specially prepared large-mode-field low-NA double-cladding rare earth doped YAG derivative optical fiber, and the other end of the large-mode-field low-NA double-cladding rare earth doped YAG derivative optical fiber is connected with the input end of the cladding light filter. The problem that expansion and diffusion of a fiber core in the YAG derived optical fiber are not controlled is solved, and therefore the theoretical power limit of single-frequency optical fiber laser amplification conducted through a silica optical fiber at present is broken through.

The invention discloses a terahertz technology detection and identification system and method, and relates to the technical field of terahertz technology material detection.The system comprises a femtosecond laser amplifier, a strong field terahertz radiation generation assembly, an electro-optical sampling assembly and a computer, and the femtosecond laser amplifier is used for emitting femtosecond laser pulses; the strong-field terahertz radiation generation assembly is used for generating a strong-field terahertz radiation beam and combining the strong-field terahertz radiation beam with the detection laser after the strong-field terahertz radiation beam penetrates through the to-be-detected sample; the electro-optical sampling assembly is used for electro-optical sampling; and the computer judges whether the to-be-detected sample is a natural material or an artificial material. According to the invention, the self-developed strong-field terahertz time-domain spectroscopy technology is used for detection, and compared with a traditional radioactive ray detection method and weak-field terahertz radiation, the strong-field terahertz radiation has the advantages of high power, high penetrability, high signal-to-noise ratio and the like in addition to low photon energy and no damage characteristics; the subtle differences of different materials of the same material can be identified more accurately, and the accuracy of detecting and identifying the types of the materials is effectively improved.

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 application provides an optical system and a monitoring method for monitoring stimulated Brillouin scattering effect. The optical system for monitoring stimulated Brillouin scattering effect firstly delivers a narrow linewidth seed source into a laser amplifier through a first optical device to amplify the narrow linewidth laser, and guides stimulated Brillouin scattering light generated by the laser amplifier to a back light monitoring module to detect the back light power and spectral components of the stimulated Brillouin scattering light in real time through the back light monitoring module, so as to realize the purpose of simultaneously and accurately measuring the stimulated Brillouin scattering light power and observing the laser components, and is more conducive to judging whether the stimulated Brillouin scattering effect occurs. Further, the optical system can adjust the light splitting ratio of the first optical device and the back light monitoring module to protect the narrow linewidth seed source and the spectrometer in the back light monitoring module from the damage of the back light to the greatest extent, and achieve the purpose of accurately judging the stimulated Brillouin scattering effect and protecting the system safety.

The invention relates to a method for amplifying a forward-running laser pulse (16) and less amplifying a backward-running laser pulse (20), wherein the laser pulses (16, 20) pass through a pumped laser amplifier (14), comprising the method steps: A) switching on or increasing a pump power provided by a pump source for the laser amplifier (14) before passing through the forward-moving laser pulse (16) and switching off or decreasing the pump power provided by the pump source for the laser amplifier (14) before passing through the backward-moving laser pulse (20); and / or B) Operating the laser amplifier (14) with such a high small-signal amplification and / or such a low saturation power that the forward-running laser pulse (16) reduces the population inversion of the laser amplifier (14) for the backward-running laser pulse (20) to the greatest possible extent.

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 concentration gradient design method of a laser amplifier gain medium and the laser amplifier gain medium, and relates to the technical field of laser amplification, and aims to solve the heat effect problem that heat distribution is uneven due to uneven pump light absorption distribution of the laser amplifier gain medium. Technical points of the application include: according to the heat conduction equation, the phase difference of each section of the crystal corresponding to the seed light passing through the pump light region when the laser amplifier amplifies the seed light is calculated and obtained; according to the phase difference of each section of the crystal through which the seed light passes being equal, the phase difference of each section of the crystal corresponding to the seed light passing through the pump light region is set to be equal; the absorption coefficient of each section of the crystal is obtained by iterative solution using simulation software; and the concentration gradient of each section of the crystal is calculated and obtained according to the relationship between the absorption coefficient and the concentration gradient. According to the application, the concentration distribution of the laser amplifier crystal is designed according to the depolarization generated by the seed light passing through the amplification laser medium, so that the purpose of reducing the thermal depolarization effect from the root is achieved.

The present invention discloses a laser amplifier based on wavefront aberration correction, which relates to the technical field of lasers. It includes a laser source, a gain medium, a wavefront sensor, an adaptive optical wavefront correction module, and a feedback control system. The laser source is connected to the gain medium through a first optical coupler. The laser beam amplified by the gain medium is output through a second optical coupler. The wavefront sensor is connected to the output end of the gain medium. The feedback control system is connected to the wavefront sensor and the adaptive optical wavefront correction module through a data bus, and automatically generates a correction signal according to the wavefront aberration data. By installing the feedback control system, the present invention realizes the function of real-time adjusting correction parameters based on wavefront aberration, solves the problem that traditional laser amplifiers are difficult to monitor and correct wavefront aberration caused by optical system errors or environmental disturbances in real time, improves the focusing performance and transmission efficiency of the laser beam, and maintains stable and high-quality beam output.

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 relates to a laser amplifier assembly, a laser system and a lithographic apparatus. The laser amplifier assembly includes: first and second optical mirrors configured to transmit one of signal light and pump light and reflect the other of the signal light and the pump light, a wavelength of the pump light being different from a wavelength of the signal light; the laser amplification cavity is arranged between the first optical lens and the second optical lens, the laser amplification cavity comprises a laser gain medium doped with at least one doping agent, and the signal light is transmitted to the laser amplification cavity through one of the first optical lens and the second optical lens and penetrates through the laser gain medium; the pump light is transmitted to the laser amplification cavity via at least one of the first optical mirror and the second optical mirror and passes through the laser gain medium to interact with the laser gain medium to amplify the signal light, and one of the first optical mirror and the second optical mirror is configured to output the amplified signal light.

The invention discloses a dual-channel laser amplification device and method, and belongs to the technical field of lasers, and the device comprises a first seed laser unit and a second seed laser unit which are used for outputting two seed lasers with different incident angles and different refractive indexes in a gain medium; the pumping module is used for generating pumping light to provide pumping conditions for power amplification of the two beams of seed laser; the thermal control module is used for providing working temperature control conditions for the whole device; the laser gain medium is used for receiving two beams of seed laser incident from different incident angles through the incident end face and emitting the seed laser at the same angle through the emergent end face after multiple times of total reflection with different paths in the gain medium; and the third laser beam output unit is used for combining the two beams of seed laser emitted at the same angle to obtain an output light beam after power amplification. Power amplification of two laser beams is realized based on the single laser gain module, the laser beam combining function is realized, and the integration level of the laser amplifier and the light beam combining system is effectively improved.

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 high-wind-speed coherent laser wind-finding radar device, which comprises a seed laser, a plurality of cascaded acousto-optic frequency shift modules, a laser amplifier, a first optical switch, a laser transmitting and receiving detection module, a wind field inversion module and a wind speed identification and control unit, and is characterized in that the plurality of cascaded acousto-optic frequency shift modules realize frequency shift and beam splitting of the seed laser; the first optical switch selects the seed laser output by one acousto-optic frequency shift module as heterodyne detection seed laser; the wind field inversion module performs wind field inversion on the heterodyne beat frequency signal output by the balance detector to obtain a wind speed measurement result; the wind speed identification and control unit controls the frequency shift amount of the emitting seed laser and the frequency shift amount of the heterodyne detection seed laser, so that the difference value between the Doppler frequency shift amount caused by the wind speed and the frequency shift amount of the heterodyne detection seed laser is within the bandwidth range of the balance detector, and effective detection of the wind speed is achieved. According to the invention, the wind speed measurement range of the coherent wind lidar can be effectively improved, and the reduction of the wind speed measurement precision is not caused.

The present invention discloses a dual-channel laser amplification device and method, belonging to the field of laser technology. The device comprises: a first seed laser unit and a second seed laser unit for outputting two seed laser beams with different incident angles and refractive indices in a gain medium; a pump module for generating pump light to provide pumping conditions for power amplification of the two seed laser beams; a thermal control module for providing operating temperature control conditions for the entire device; a laser gain medium for receiving two seed laser beams incident at different incident angles through an incident end face, and after undergoing several total reflections with different paths within the gain medium, emitting the two seed laser beams at the same angle through an exit end face; and a third laser beam output unit for combining the two seed laser beams emitted at the same angle to produce a power-amplified output beam. The present invention uses a single laser gain module to achieve power amplification of two laser beams and has a laser beam combining function, effectively improving the integration of the laser amplifier and beam combining system.

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.

The present invention discloses a fiber laser amplifier based on hierarchical heat dissipation, which relates to the field of high-brightness fiber lasers. The fiber laser amplifier comprises: a fiber laser seed source, a pigtail semiconductor pump source, a first-stage fiber oscillator component, and a second-stage fiber laser amplifier component. The semiconductor pump light and the laser seed light are combined and injected into the first-stage fiber oscillator component, and the low-brightness semiconductor pump light is converted into a higher-brightness transition laser through a laser oscillation process with a lower quantum loss. The second-stage fiber laser amplifier component converts the transition laser into the laser seed light and outputs a high-brightness main laser. Based on the configuration of the pigtail semiconductor pump source, the present invention effectively distributes the heat generated by the quantum loss to two-stage components for heat dissipation, while also reducing the heat concentration on the single-stage component and improving the reliability of the amplifier.

The present invention discloses a device for measuring the temporal gain evolution and relaxation process of CO2 laser amplification, belonging to the field of laser technology. The device comprises: a continuous CO2 laser seed source, a short-pulse CO2 laser seed source, a first beam splitter located in the outgoing optical path of the short-pulse CO2 laser seed source; a pulsed CO2 laser information detection module located in the transmitted optical path of the first beam splitter; a first thin-film polarizer located at the intersection of the reflected optical path of the first beam splitter and the outgoing optical path of the continuous CO2 laser seed source; a CO2 laser amplifier, a second thin-film polarizer, a second beam splitter, a chopper wheel module, and a first mercury cadmium telluride detector located sequentially in the outgoing optical path of the first thin-film polarizer; and a time gating circuit for controlling the on / off timing of the continuous CO2 laser seed source, the short-pulse CO2 laser seed source, and the CO2 laser amplifier. This device simplifies traditional gain measurement devices while simultaneously studying various relaxation phenomena during the amplification process.

The application discloses a birefringence compensation device and method for improving extraction efficiency of a laser amplifier, wherein two end-pumped Yb:YAG crystal rods are connected in series through a 4f system and a quartz optical rotation crystal, signal laser is amplified twice after passing through the 4f system, and thermal-induced birefringence is precisely compensated; meanwhile, a beam expanding 4f imaging system is adopted to reduce the size of signal laser and pump laser in the first rod, so as to improve the extraction efficiency, and meanwhile, the signal spot in the second rod is ensured to be large enough to prevent damage of high-energy laser to optical elements. Compared with the traditional birefringence compensation method, the application designs parameters according to the disadvantages of Yb:YAG crystal quasi-three-level, so that the extraction efficiency is improved while the same compensation effect is achieved, and higher-energy laser pulses are outputted, which is beneficial to industrial processing.

The utility model discloses a drying box and a laser amplifier, which comprise a gas circuit structure and a gas pump, and the gas pump is communicated with the gas circuit structure, so that gas can circulate in the gas circuit structure; the gas circuit structure comprises a drying device which is provided with a gas inlet end and a gas outlet end, and the drying device is used for drying gas; the detection device comprises a detection body and detectors, the detection body defines a first channel and a second channel, and the first channel and the second channel are arranged in a separated mode and contain the detectors respectively; wherein the first channel is communicated with the air inlet end, the detector in the first channel is used for detecting the humidity of the air before the air is input into the drying device, the second channel is communicated with the air outlet end, and the detector in the second channel is used for detecting the humidity of the air output from the drying device. According to the drying box, the humidity of gas before and after drying can be detected, so that the humidity of the gas is accurately monitored, and the air pump can be adjusted according to the humidity difference before and after drying, so that the required dryness of the gas is achieved.

A laser amplifier includes a laser amplifying medium having a rectangular cross section perpendicular to an optical path axis of seed light, a pair of metal blocks bonded to two wider opposite surfaces of four surfaces of the laser amplifying medium parallel to the optical path axis, an excitation light source configured to output excitation light that excites the laser amplifying medium, and a collimating lens configured to collimate the excitation light.

The invention provides a laser amplifier control system and method. The system comprises a seed source, an amplifier, a phase modulator, a nonlinear frequency conversion module and a dichroic mirror which are sequentially arranged on a light path. Light output by the nonlinear frequency conversion module is divided into two paths through a dichroic mirror, one path serves as system output light, and a light garbage can is arranged in the light path direction of the other path; the phase modulator is adjusted, so that when the polarization direction of the laser is matched with the nonlinear frequency conversion module, the light output by the system is the light subjected to nonlinear frequency conversion, and the other path of frequency light is recycled by the light garbage can; otherwise, the nonlinear frequency conversion module only outputs the fundamental frequency light. According to the invention, no matter whether system output light exists or not, laser always passes through the crystal in the nonlinear frequency conversion module, the crystal does not have temperature drift caused by selective laser passing, and the stability of the system output light is ensured.

The invention relates to a double-pulse modulation long-distance distributed optical fiber temperature sensing system which comprises a laser, laser output by the laser is transmitted to a grating and a first-stage laser modulator through a beam splitter, laser output by the first-stage laser modulator is transmitted to one port of a circulator through a first laser amplifier, and laser output by the second-stage laser modulator is transmitted to the other port of the circulator through a second laser amplifier. A lower port of the circulator is connected with the sensing optical fiber, a second lower port of the circulator is connected with the input end of the second laser amplifier, the grating and the output end of the second laser amplifier are connected with the signal processing module, and a second-level laser modulator is further arranged between the first-level laser modulator and the first laser amplifier. The laser pulse width output by the first-stage laser modulator is larger than that output by the second-stage laser modulator, and the first-stage laser modulator has laser intensity gain of at least one decibel. The dipulse modulation long-distance distributed optical fiber temperature sensing system provided by the invention has a relatively long detection distance under the condition that the resolution ratio is not reduced.

The invention relates to the technical field of lasers, in particular to a closed laser amplifier beam expanding and focusing integrated device. According to the technical scheme, the device comprises a bottom plate for providing support, and further comprises a collimation system, a laser amplifier used for generating high-energy and high-beam-quality laser and a focusing system which are installed on the top of the bottom plate and sequentially arranged, and a lifting system used for adjusting the height of the laser amplifier is installed on the bottom plate; the laser amplifier comprises a light-gathering cavity shell, a water inlet is formed in the bottom of the light-gathering cavity shell, and a water outlet is formed in the top of the light-gathering cavity shell; a ceramic layer is laid on the inner wall of the condensation cavity shell, and a quartz layer is laid on the surface of the ceramic layer. According to the invention, the collimating and focusing system and the laser amplifier are integrated in the dustproof shell through modular design, so that the multi-stage laser can be conveniently constructed, the light path can be accurately adjusted, the heat can be efficiently dissipated, the light beam quality can be guaranteed, and dust invasion can be prevented.

The present invention relates to an end-pumped system for efficiently pumping a laser active medium. The system comprises a laser diode stack emitting an optical beam, equipped with a fast axis collimator that defocuses the fast axis of the optical beam. A lens duct with a tapered shape and flat input and output surfaces is coupled to the diode stack. The input side of the lens duct covers the entire area of the diode stack, preventing pump beam escape through total internal reflection on its side surfaces. The system further includes a laser active medium, coupled to the output side of the lens duct. The invention enables precise control of pump beam divergence angles and can incorporate various materials for the lens duct, including borosilicate crown glass, fused silica, calcium fluoride, zinc selenide, germanium, undoped YAG, polymethyl methacrylate, or sapphire. Applications of the system include solid-state lasers and its utilization as a part of laser amplifiers and oscillators, offering enhanced performance and efficiency in laser technologies.

The utility model provides a double-end pumping slab laser amplifier based on temperature control, which comprises end face pumping laser modules respectively arranged at two ends of a slab heat sink module, and the end face pumping laser modules and the slab heat sink module are connected with a temperature detection assembly and a temperature control assembly. The temperature detection assembly comprises a first temperature probe used for monitoring the temperature of the end face pumping laser module, a second temperature probe used for monitoring the side face of the lath gain medium, and a third temperature probe used for monitoring the top face of the lath gain medium. The temperature control assembly comprises a first water cooling device and a fourth water cooling device which are used for adjusting the temperature of the end face pumping laser module, and further comprises a second water cooling device and a third water cooling device which are used for adjusting the temperature of the lath heat sink module. And the slab gain medium fully absorbs the pump light, so that the damage risk caused by escape of the pump light is reduced.

A double-ended excitation laser amplifier includes a laser amplification medium configured to amplify pulsed seed light, an excitation light source configured to output excitation light, a first λ / 4 wavelength plate and a first λ / 2 wavelength plate through which the excitation light is transmitted, a first polarizing beam splitter configured to separate the excitation light transmitted through the first λ / 4 wavelength plate and the first λ / 2 wavelength plate into first light having a first polarization direction and second light having a second polarization direction, a first incident optical system configured to cause the first light to be incident on a first end of the laser amplification medium, and a second incident optical system configured to cause the second light to be incident on a second end of the laser amplification medium.

The present invention discloses a synchronous timing control system for high-repetition-rate burst pulse laser illumination measurement, which relates to the field of laser illumination measurement technology. The system includes a first signal generator, a second signal generator, a third signal generator, a laser seed source, a laser amplifier, and a camera system. The first signal generator is configured to output a first control signal to the laser seed source and a second control signal to the second signal generator. The third signal generator is configured to output a third control signal to the laser amplifier and a fourth control signal to the second signal generator. The second signal generator generates a camera trigger signal based on the second control signal and only outputs the camera trigger signal to the camera system within the high-level range of the fourth control signal. The present invention ensures that camera exposure is strictly synchronized with the laser pulse, allowing the camera system to capture the laser illumination effect throughout the entire duration of the macropulse.