755 results about "Single pulse" patented technology

A time-of-flight based distance measuring method and a time-of-flight based distance measuring system are provided. The distance measuring method includes: sending N consecutive pulses from a transmitter side intermittently, N being a positive integer greater than one, wherein the N consecutive pulses are reflected by a target object, and a reflection signal is generated accordingly, during arrival of the reflected signal at a receiver side, sampling the reflected signal multiple times according to a predetermined sampling interval within a predetermined sampling duration and accordingly generating a sampling result; detecting time of flight of a single pulse of the N consecutive pulses traveling from the transmitter side to the receiver side according to the sampling result; and measuring a distance between the target object and a reference position according to the time of flight. The distance measuring method maintains good measurement quality, measures the distance rapidly, and consumes low power.

The invention discloses a transparent material / metal dissimilar material ultrafast laser welding method based on a burst mode, and belongs to the technical field of laser micro-nano machining, and the transparent material / metal dissimilar material ultrafast laser welding method comprises the steps that the surface roughness and flatness of a pre-welded piece are treated through a mirror grinding and polishing technology, so that a sample piece reaches the optical contact condition, the pre-welded piece is in lap joint with a tool platform through a specially-made clamp, and the pre-welded piece is welded to the tool platform; when a visual Newton ring appears on a contact surface and an ultrafast laser focus is located at a material interface, using a burst mode under an ultrafast laser processing platform to increase the number of sub-pulses, welding a micro-area, equally dividing the energy of a single pulse into a plurality of pulses, and then emitting light in a pulse sequence mode, by using the burst mode containing multiple pulses, the heat accumulation effect can be achieved more easily, the ablation efficiency and the connection strength and stability of the transparent material and the metal heterogeneous material are improved while the machining rate is increased, and the method has wide application prospects.

The invention discloses a partial discharge fault type classification method based on a GAN adversarial network and a CNN-BiLSTM-Attention mechanism, and belongs to the technical field of fault diagnosis, and the method comprises the following steps: S1, carrying out the batch normalization processing of a collected high-frequency current signal, and carrying out the single pulse extraction of a processed waveform signal; s2, performing time-frequency analysis on the processed signal by using a wavelet transform method, constructing a data time-frequency spectrogram, and introducing an optimized GAN generative adversarial network to expand an unbalanced data set; and S3, converting the time-frequency spectrogram into a time-frequency matrix, and inputting the time-frequency matrix into a CNN-BiLSTM-Attention attention mechanism model. According to the method, the diagnosis model is adopted, the type of the partial discharge fault is accurately judged, meanwhile, the method can be applied to an unbalanced data model through data expansion processing, and it is indicated that the proposed model has good generalization ability.

The invention discloses a partial discharge mode identification method and device, and relates to the field of power equipment fault diagnosis, and the method comprises the steps: collecting a partial discharge signal of high-voltage electrical equipment; preprocessing the collected data to obtain a single pulse signal; the method comprises the following steps of: generating a time-frequency graph of a single pulse on the basis of a continuous wavelet transform (CWT) method, and carrying out spatial feature extraction on the generated time-frequency graph by using a multi-scale convolutional neural network (MCNN); the features extracted by the MCNN are input into a bidirectional long short-term memory neural network (BiLSTM), and the time sequence characteristics of the partial discharge features are obtained; an attention mechanism is used to focus key segments of a splicing sequence output by the BiLSTM, global features are extracted, and the accuracy of pattern recognition is improved. According to the invention, mode identification can be carried out according to the collected partial discharge signal, the partial discharge type is judged, related personnel are helped to make a targeted maintenance plan, and long-term reliable operation of electrical equipment is guaranteed.

The embodiment of the invention discloses an etching method, an etching device and a solar cell module. The etching method comprises the following steps: controlling a light spot overlapping rate to be smaller than a preset overlapping rate; generating laser with preset performance parameters; shaping the laser into rectangular flat-topped light; and focusing the rectangular flat-topped light into a light spot with a preset size, and etching the perovskite functional layer in the to-be-etched cell according to the light spot overlapping rate. According to the technical scheme provided by the embodiment of the invention, the etching method is set, the perovskite functional layer is etched by adopting point contact, the laser beam adopts rectangular flat-topped light, each pulse independently acts on the film layer, single-pulse etching is performed on the perovskite functional layer in the to-be-etched cell, heat accumulation in an optical pulse overlapping region is avoided, and electrode deposition is more facilitated.

The invention discloses an insulation resistance and capacitance measuring circuit and method based on monopulse double-edge analysis, and relates to the related field of the electrical insulation online monitoring technology, and the circuit comprises a detected object and an insulation detection circuit. The insulation detection circuit comprises a controlled pulse voltage source, a coupling resistance network, a current sensor, a switch control module, a signal modulation circuit and a processor. The measurement method implemented based on the circuit comprises the following steps: injecting a common-mode voltage pulse into a transmission line of the power transmission system by adopting a pulse transmitter; pulse current response is collected in real time, a current oscillogram is drawn, and a three-point sampling method is introduced to record a current value for insulation impedance parameter calculation; according to a load condition, a double-edge verification method is applied based on a pulse current attenuation characteristic, and insulation impedance parameters including a resistive component and a capacitive component are independently calculated by analyzing a pulse current rising edge and a pulse current falling edge. According to the invention, non-intrusive synchronous monitoring of resistive and capacitive components of line-to-ground impedance is realized, and the detection precision is improved.

The invention provides a pulse passing rate improving method based on accumulation signal demodulation, and belongs to the technical field of nuclear electronics digital pulse processing. Comprising the following steps: performing baseline deduction and monopulse screening on a radiation field pulse signal; constructing a nuclear pulse signal model, fitting to obtain model parameters, and constructing a system response matrix; modeling a nuclear detection physical process into a mathematical model; solving a constraint optimization problem by using a non-negative least square method; and demodulating and calculating all the pulse signals including the stacked pulses which are discarded by stacking, so as to obtain delta pulses containing energy information. According to the invention, the accumulation signal which is abandoned by a traditional accumulation abandoning algorithm is demodulated, so that the technical problem of increasing the pulse passing rate is solved, and meanwhile, heavy peaks and high-energy trailing in an energy spectrum are inhibited. Compared with an existing accumulation discarding method, the pulse passing rate effect is remarkably improved on the premise that the energy spectrum accuracy is guaranteed.

The invention relates to the field of laser micro-nano machining, in particular to an ultrafast laser high-stability welding method and device for heterogeneous materials, effectively solves the problem of welding defects caused by unstable metal surfaces during ultrafast laser welding of large-diameter transparent / metal heterogeneous materials, effectively improves the welding strength and stability, and improves the welding quality. And the mirror surface and non-mirror surface metal welding quality unification is realized. The method specifically comprises the steps that the light emitting mode of ultrafast laser is adjusted, monopulse output is converted into Burst pulse string output, the ultrafast laser in the Burst output mode is used for conducting polishing pretreatment on the surface of the metal material, stable control over the surface quality of the mirror surface and the surface quality of the non-mirror surface metal can be achieved, and the surface roughness after polishing can be controlled to be smaller than lambda / 4; the transparent material and the polished metal material are welded through ultrafast laser, stable control over the welding strength of the heterogeneous material can be achieved, and the welding strength of the mirror-surface metal material is close to that of the non-mirror-surface metal material.

The invention discloses an area array Gm-APD detection laser radar distance drift error correction method and system, and belongs to the field of data processing. The method comprises the steps of building a single-photon laser ranging system, adjusting the width of a laser pulse, detecting a target distance by using an area array Gm-APD detection laser radar, carrying out repeated measurement on a certain plane for multiple times, obtaining arrival time distribution of a target single-photon event, carrying out weighted average after carrying out filtering and denoising on ranging signals, and obtaining a signal region ranging value. And estimating the average detection photon number of the received monopulse by using the statistical detection probability, and correcting the drift error. According to the method, the drift error caused by echo signal photon accumulation in the area array Gm-APD detection laser radar can be corrected, and the ranging error of the area array Gm-APD detection laser radar is reduced.

The invention discloses a laser doping method and application, and belongs to the technical field of new energy batteries. The laser doping method comprises the following steps that S1, a printing procedure is conducted, specifically, slurry containing doping elements is printed on the front face and / or the back face of a semiconductor substrate and dried, a printing area comprises an area A and an area B from inside to outside, and a doping area is covered with the area A; s2, a laser doping process: carrying out laser doping on the area A of the printing area; the power of the laser is P1, and the frequency of the laser is f1; s3, a laser removal process: carrying out laser removal on a region B containing the printing region, wherein the power of the laser is P2, and the frequency of the laser is f2; wherein the monopulse energy E2 is smaller than E1 (E = P / f); and S4, a cleaning process. The laser doping method is applied to preparation of solar cells. According to the method, the time consumption and the use amount of chemical reagents used in the cleaning procedure can be reduced, the production cost is reduced, and the technical problem of environmental pollution is solved.

The invention discloses a time domain azimuth wide bunching imaging method based on sub-pulse diversity, and the method comprises the steps: constructing a multi-frequency sub-pulse wide bunching signal model, enabling different sub-pulse beams of a radar to point to different imaging regions, and obtaining a total echo signal received by the radar; according to the characteristics of a radar system, the pulse repetition frequency and synthetic aperture time of the radar are designed; and based on the pulse repetition frequency and synthetic aperture time of the radar, performing wide-range bunching imaging processing on the total echo signal received by the radar to obtain a complete image with large azimuth imaging breadth. According to the invention, the single pulse of the radar is divided into a plurality of sub-pulses, and the different sub-pulses point to different azimuth positions, so that the radar has the azimuth wide bunching capability; the application of a sub-pulse diversity technology in an imaging system is effectively realized, and the problems of high operation complexity and distance resolution loss of a scene edge part of a method for applying a frequency scanning radar to an azimuth array are solved.

Implementations of a method of detecting a plurality of radio pulses may include, using at least one signal processor: pre-processing a wideband intermediate frequency signal to form a channelized segment from a software defined radio; performing coherent single-pulse correlation using a spectrogram of the channelized segment; and performing multi-pulse combining with the spectrogram, and determining whether a pulse train including a plurality of radio pulses from a desired pulsed radio signal may be present in the spectrogram.

Disclosed is a method and a device for in situ process monitoring and control down to a single pulse measurement during laser processing, like ablation, laser printing additive manufacturing and modification of refractive index. The disclosure relates to laser material processing and to an integrated process monitoring using interference effects of a laser beam or laser pulse.

The invention discloses an all-solid-state debugging-free slab laser based on an orthogonal Porro prism, and belongs to the technical field of solid laser. The diode stack array is used as a pumping source; the pumping shaping system performs homogenization shaping on the slow axis direction of the diode stack array; the coupling cavity mirror introduces the shaped light field into the lath laser crystal, and is used as an oscillation laser reflector at the same time; the ridges of the first Porro prism and the second Porro prism are mutually orthogonal; a light field introduced into the slab laser crystal reaches the first Porro prism through the polaroid, enters the coupling cavity mirror through the polaroid after being reflected, is subjected to repeated reciprocating oscillation on the end face where the coupling cavity mirror is located and the end face where the first reflector and the second reflector which are longitudinally arranged are located to reach the second Porro prism, and then returns to the first Porro prism along the original path; and the light is output by the polaroid. Large single pulse energy can be output based on a single resonant cavity, cascade amplification is not needed, the system size compactness is very high, and the photoelectric conversion efficiency is high.

The invention provides an automatic frequency locking circuit based on a time-to-voltage converter and a phase-locked loop, and relates to the technical field of phase-locked loops, a first frequency-halving unit and a second frequency-halving unit respectively carry out frequency-halving processing on a reference signal and a frequency division signal of a current comparison period to obtain a first square wave signal and a second square wave signal; the first square wave signal and the second square wave signal are transmitted to the time-to-voltage converter; the time voltage converter comprises a phase generation unit, a first charge pump and a second charge pump, the phase generation unit generates an enable signal according to the first square wave signal and the second square wave signal, and the first charge pump and the second charge pump respond to control of the enable signal and collect single pulse signals from the first square wave signal and the second square wave signal respectively so as to supply power to the input end of the comparator; the comparator compares power supply voltages of the two input ends to achieve frequency comparison of the reference signal and the frequency division signal. And selection in a plurality of phase signals is not needed, and required digital circuit modules are reduced, so that the delay of the reference signal and the frequency division signal in the conversion process is reduced.

Disclosed in the present invention is a near-infrared wavelength scanning pulse fiber laser having a low mode-locking threshold. According to the present invention, a nonlinear amplifying loop mirror and a saturable absorber mirror architecture are used to achieve a low mode-locking threshold and ensure long-term mode-locking stability. After mode-locking self-starting, an automatic control module automatically achieves single-pulse operation by adjusting the intensity of retro-reflected pulses. In the single-pulse operation stage, different frequencies of radio frequency signals and different signal intensities are provided for an acousto-optic tunable filter by means of a radio frequency module to achieve a 1030 nm-1100 nm wavelength scanning and tuning range.

The high-precision monopulse angle measurement method based on third-order Taylor expansion is suitable for detecting a target object by an airborne radar, and comprises the following steps: establishing an array echo model of a non-ideal radar; performing self-calibration of the non-ideal radar based on the array echo model; radar non-ideal compensation is carried out on the sum and difference beam weights of the airborne radar; beam forming is carried out according to echoes, detected by the airborne radar, of the target object; and determining an angle measurement model of the sum-difference monopulse, performing third-order Taylor expansion on the angle measurement model, and determining an angle estimation value. Compared with a rationality radar monopulse angle measurement technology based on first-order Taylor expansion, non-ideal error compensation is carried out on the radar, third-order Taylor expansion is carried out on the monopulse ratio, angle measurement deviation caused by radar non-ideal and fixed angle discrimination slopes is compensated, and the angle measurement precision is effectively improved within the main beam range.

The invention discloses a ground wire deicing machine optimization method and system based on high-amplitude narrow-pulse-width electric pulses, and relates to the technical field of deicing machine optimization, and the method comprises the following steps: obtaining ice accumulation first data, and carrying out the type classification of ice layers, so as to obtain a swinging ice layer and a hard ice layer; if the ice layer type is a swinging ice layer, obtaining second data of the deicing environment and calculating an ice layer re-freezing occurrence probability, and carrying out secondary classification on the swinging ice layer according to the ice layer re-freezing occurrence probability; if the ice layer type is a hard ice layer, constructing a ground wire electric pulse deicing mathematical model based on the deicing environment second data and the icing first data, and obtaining an initial deicing machine pulse repetition frequency and an initial single pulse duration; respectively weakening the initial deicing machine pulse repetition frequency and the initial single pulse duration to obtain a corrected deicing machine pulse repetition frequency and a corrected single pulse duration; and deicing is carried out according to the corrected pulse repetition frequency of the deicing machine and the corrected single pulse duration, and the hard ice layer after deicing operation is converted into a swinging ice layer.

The invention discloses a green laser and a laser welding machine. The green laser comprises a pumping source, a first reflector, a laser crystal, a polarization beam splitter, a second reflector, a frequency doubling crystal, a telescope lens group and a spectroscope; the pumping source provides pulse pumping light; the laser crystal absorbs the pulse pump light to generate fundamental frequency laser in an infrared band, the fundamental frequency laser enters the polarization beam splitter and is split into P polarized light and S polarized light, the P polarized light is transmitted out of the resonant cavity, and the S polarized light is transmitted in the resonant cavity; and the telescope lens group converges the fundamental frequency laser to the frequency doubling crystal to generate frequency doubling laser of a green light wave band, and the frequency doubling laser is transmitted by the spectroscope and then is output. The green laser is used for spot welding of high-reflection materials such as copper and aluminum, the maximum single pulse energy can reach 5 J, the maximum peak power is 2 kW, the pulse width ranges from 0.05 ms to 5 ms, the problem of low absorption of the high-reflection materials to laser in the 1-micron wave band is solved, and the green laser is an edge tool for precise spot welding of the high-reflection materials.

The invention provides an ultrafast scanning measurement system for optical element absorption loss spatial domain and frequency domain distribution based on dispersion Fourier transform. Comprising an ultra-short pulse laser, a spatial light focusing and collecting module, a laser average spectrum measurement module, a single-pulse real-time spectrum measurement module based on dispersion Fourier transform, a time lens module, a high-speed photoelectric detector and a high-frequency oscilloscope. According to the invention, based on the dispersion Fourier transform principle, the real-time spectrum of a single pulse can be demodulated, and the scanning detection module can be used to take the light pulse repetition period as the scanning frame rate of the optical element, so that the spatial domain two-dimensional distribution of the absorptivity of the optical element can be subjected to ultrafast scanning detection. And a means is provided for high-efficiency comprehensive detection of heat absorption of the large-aperture optical element.

The invention discloses a light path system based on a gas-filled hollow-core optical fiber, and the system comprises a spectrum broadening device which comprises a first gas extraction chamber, a gas inlet chamber and a second gas extraction chamber, the first gas extraction chamber and the second gas extraction chamber are located at the two ends of the gas inlet chamber respectively, and the first gas extraction chamber and the gas inlet chamber are separated through a first sealing part; the second air exhaust chamber and the air inlet chamber are separated through a second sealing piece; the spectrum broadening device is internally provided with a hollow-core optical fiber and is provided with at least one through hole penetrating through the pipe wall of the hollow-core optical fiber, the two ends of the hollow-core optical fiber penetrate through the first sealing piece and the second sealing piece respectively so that the two ends of the hollow-core optical fiber can be communicated with the first air suction chamber and the second air suction chamber respectively, and the through hole is located in the air inlet chamber. The two ends of the hollow-core optical fiber are subjected to air exhaust, so that the ionization rate and the self-focusing effect generated when the laser is output after the spectrum of the inflated hollow-core optical fiber is broadened can be remarkably reduced, the requirement for improving the power input of the laser is met, and a light path system can bear higher laser monopulse energy compression.

The invention relates to a method for detecting a marine corrosion primary process, which comprises the following steps of: constructing three vacuum chambers and connecting the three vacuum chambers by using vacuum pipelines to form a detection system; ultrafast femtosecond laser with the repetition frequency being 1 kHz, the single pulse energy being 6 mJ, the pulse width being 35 fs and the central wavelength being 800 nm is generated through a pulse amplifier; one beam of 2mJ enters a vacuum chamber pipeline to be transmitted as a pulse light beam for detection in the original process of ocean corrosion, the other beam of 4mJ is transmitted outside the vacuum chamber to be used as a pump pulse light beam, and 400 nm pump pulse laser is generated through frequency doubling of a BBO crystal; the pump light beam and the detection light beam are incident on a sample of a sample mechanism in the third vacuum chamber, then the pump light beam is blocked, and only the detection light beam is incident on the sample; xUV light beams reflected from the sample are subjected to spectral dispersion and then enter a CCD detector, and the dynamic response of the sample after being excited by the pump light is monitored by measuring the transmissivity, reflectivity or absorption change of the surface of the sample.

Implementations of disclosed systems and methods are capable of changing the frequency or other waveform characteristics dynamically based on receiving feedback about the effect of an electromagnetic pulse radiation on a target electronic device. Various implementations can be configured to emit electromagnetic pulses at a single radio frequency or a plurality of radio frequencies. For example, the frequency of the carrier electromagnetic radiation in a single pulse can change during the pulse interval. As another example, a single electromagnetic pulse can comprise a frequency comb with two or more frequencies.

The invention provides an adjustable pulse string laser and a design method thereof. The laser comprises a pump light fiber coupling focusing system, an endoscope, a laser crystal, a passive Q-switched crystal, an active Q-switched system and a laser output mirror which are sequentially arranged according to a light path, the adjustable pulse train laser is configured to control the number of pulse trains under the condition of the same dominant frequency or output the same pulse trains under different dominant frequencies through the equivalent length control of the passive Q-switched crystal and the modulation control of the active Q-switched system in a working state. According to the invention, through cooperation of the active Q-switching system and the passive Q-switching crystal, output of a main frequency and a pulse string is obtained in a mode of combination of active Q-switching and passive Q-switching, multi-time processing of the same point in fine processing is facilitated, and single pulse energy is constant, so that a pulse string laser scheme which is lower in cost and more ingenious and uncomplicated in structure is provided; the regulation and control flexibility is good, and the stability and reliability of the laser are higher.

The application discloses a method for simultaneously resisting suppressing interference forward-looking imaging of a missile-borne forward-looking array radar, adopts an array antenna in a cut-off track direction to receive echoes of a forward-looking area, and samples to obtain distance-pulse-array three-dimensional echo data; pulse compression in the distance direction is performed on the three-dimensional echo data, a pulse compression reference function and a migration correction factor are multiplied in the frequency domain, and high resolution in the distance direction is realized; multi-channel receiving data of each distance-pulse unit is selected, and is sequentially arranged to form a corresponding space snapshot of the unit; a covariance matrix of interference and noise is established, and the maximum likelihood estimation value of the target angle and amplitude in the interference environment is approximately solved by using an adaptive single-pulse algorithm on the space snapshot signal of each distance-pulse unit after distance pulse compression; and the angle measurement result is projected to the distance-azimuth domain, and through space coordinate conversion, a two-dimensional forward-looking imaging diagram is obtained. The application realizes high-resolution imaging of a forward-looking target while effectively suppressing main lobe suppressing interference.

A comprehensive detection device for a radar seeker relates to the technical field of measurement and control, a target angular displacement forming device (1) is arranged on the right side of the ground of a microwave anechoic chamber (3), the target angular displacement forming device is connected with a PXI system in a measurement and control cabinet (5) located on the outer side of the microwave anechoic chamber through a serial port bus, and a window is arranged on the wall of the left side of the microwave anechoic chamber. A mounting clamp (16) on the sliding clamping table (4) clamps the radar seeker to be tested and drives the radar seeker to be tested to enter the microwave darkroom from the window, and the radar seeker to be tested is connected with a high-frequency unit and a signal switching unit in the measurement and control cabinet through cables to test a receiving loop; the device has the advantages that the size is small, the assembly is convenient and fast, the shielding darkroom can be used for accurate measurement in an inner field, the device can be portable and used in an outer field, and the depth of the single-pulse Doppler radar seeker can be detected.

The invention belongs to the field of particle accelerator microwaves, and particularly relates to a C-band compact spherical microwave pulse compression device which comprises a shell, a dual-polarization mode coupler and a circular waveguide, a spherical energy storage cavity is formed in the shell, and the circular waveguide and the spherical energy storage cavity are communicated through a coupling hole; the dual-polarization mode coupler comprises a rectangular waveguide, a butterfly-shaped matching section and a cylindrical matching section. According to the klystron radio frequency pulse compression circuit, the radio frequency pulse with the pulse width of 2.5 microseconds of the klystron can be compressed to 300ns, the average power gain in a single pulse is more than 4 times, the peak power gain is 6.3 times, and the compression efficiency is about 54%. According to the dual-polarization mode coupler, the functions of power distribution, mode conversion and polarization mode generation are synchronously realized, a TE10 mode in a rectangular waveguide is converted into two polarization TE11 modes which are equal in amplitude and orthogonal in phase, and then the two orthogonal TE114 modes are excited in a spherical energy storage cavity.

A method of analyzing one or ejecta, specifically kinematic properties, resulting from a dynamic event. The method comprising using a single trigger, single image sensor three dimensional photography system comprising a first plurality of pulsed laser beams, a stage for the dynamic event to occur and be observed and where the first plurality of pulsed laser beams converge. The laser beams are recombined into a single pulsed laser beam after the stage for capture on the single image sensor to a subframe for each pulsed laser beam, the subframes being combined into a unique frame for each time step. The frames are analyzed with respect to time to determine the displacement, velocity and / or acceleration thereof.

The present invention is a method for measuring arterial elasticity under a cuff pressure-maintaining state, comprising step 1: adjusting a linear deflation valve to keep the air pressure of the cuff stable; step 2: collecting pulse waves under the cuff pressure-maintaining state; step 3: using FIR high-pass and low-pass filters to filter the signal, with passbands of 0.05HZ and 30HZ respectively; step 4: screening the obtained pulse wave signal, and eliminating the waveform under the state of body misoperation according to the width and amplitude of the pulse wave; step 5: using a linear function to eliminate the baseline; step 6: normalizing a single pulse; step 7: finding the starting point of the reflected wave; step 8: calculating the intensity of the reflected wave; step 9: screening the calculation results of multiple pulse waves. The present invention reduces the baseline rebound in the initial stage of pressure maintenance by adjusting the linear deflation valve, so that the useful pulse wave signal is more complete, and the use of a single airbag not only solves the problem of inconvenient measurement, but also can better reflect the degree of arteriosclerosis of the human body by measuring the elastic coefficient of the artery.

The invention discloses an air-cooled miniature slab laser based on double-end pumping, and belongs to the technical field of solid laser. Wherein the first conduction cooling single bar and the second conduction cooling single bar are arranged at the upper end and the lower end of the lath laser crystal in a staggered manner to form a double-end pumping structure; after the first fast axis collimation cylindrical lens and the second fast axis collimation cylindrical lens respectively collimate the fast axis directions of the first conduction cooling single bar and the second conduction cooling single bar, partial end surfaces are injected into the lath laser crystal; the first resonant cavity reflector and the second resonant cavity reflector are located at the left end and the right end of the lath laser crystal; the laser injected into the slab laser crystal passes through the resonant cavity mirror and then is subjected to multi-pass back-and-forth oscillation between the first resonant cavity reflector and the second resonant cavity reflector to reach the resonant cavity output cavity mirror. The output monopulse energy is greatly improved, the overall electro-optical efficiency is high, and the system compactness is high.