318 results about "Single pulse" patented technology

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 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.

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 by-product deposit removal device is provided that can enhance the effect of removing by-product deposits that occur on the electrodes of a storage battery. [Solution] The by-product deposit removal device includes an electrode connection part connected to the electrodes of a storage battery, and a removal signal generation part that generates a by-product deposit removal signal using current extracted from the electrodes of the storage battery via the electrode connection part. The removal signal consists of a periodic pulse current, and when the amplitude value of the rising edge of a single pulse current waveform of the removal signal is H1 and the amplitude value of the undershoot after the falling edge of the pulse current waveform is H2, H2 is 0.2 to 1.0 times H1. Furthermore, when the time width of the rising edge of the pulse current waveform is T1 and the time width of the falling edge accompanied by an undershoot is T2, T2 is 0.02 to 0.2 times T1.

The application provides a leaky-wave antenna array based on a multimode substrate integrated waveguide coupler, relates to the technical fields of wireless communication and radar, and comprises a dielectric substrate, a multimode substrate integrated waveguide coupler and two leaky-wave antenna units. The multimode substrate integrated waveguide coupler is integrated on the dielectric substrate and is configured to excite modes and modes of the substrate integrated waveguide respectively in the same frequency range, generate even-mode signals with equal amplitude and in-phase and odd-mode signals with equal amplitude and opposite phase. The two leaky-wave antenna units are symmetrically arranged on the two sides of the upper surface metal layer of the dielectric substrate and are connected with two output ports of the multimode substrate integrated waveguide coupler respectively. The two leaky-wave antenna units are configured to radiate a wave beam and a difference wave beam in response to the even-mode signals and the odd-mode signals. The application solves the problem of low measurement accuracy of a traditional single-pulse antenna, has the technical effects of simplifying the design of a feed network, improving radiation performance and thus improving measurement accuracy.

The invention provides a multifunctional integrated waveform design method based on a multi-sub-pulse structure, and belongs to the field of radar detection communication anti-interference integration. Specifically, an information transmission modulation method based on joint modulation of partial phase modulation in sub-pulses and waveform position arrangement modulation between sub-pulses is proposed, and the communication rate is remarkably improved; intermittent sampling forwarding interference is effectively suppressed by using the orthogonal characteristic of waveforms between sub-pulses. A signal processing method based on monopulse multifunctional integrated echoes is provided, and Doppler tolerance is enhanced; according to the invention, the integration of detection, communication and anti-interference functions is realized, the detection and communication requirements of a high-speed moving target are met, and the engineering application value is high.

This invention provides a split Hopkinson bar device for achieving single-pulse loading, comprising an incident bar, a transmission bar, an incident wave-catching unit, and a stress wave generating unit. The incident wave-catching unit includes an incident wave-catching sleeve and an absorbing bar. One end of the absorbing bar is spaced apart from the incident bar flange, and the other end is connected to the absorbing bar flange. The incident wave-catching sleeve is fitted around the absorbing bar, with its two ends respectively fitting against the absorbing bar flange and the incident bar flange. The compressive stress wave generated by the stress wave generating unit is reflected by the incident bar flange to form a tensile stress wave. After loading the sample, a portion of the stress wave is reflected back as a compressive wave and absorbed by the incident wave-catching unit. This solves the problem of multiple reflections and interference in traditional Hopkinson bars, achieving pure single-pulse tensile loading. The device is compact, has high energy utilization, and is suitable for testing the dynamic mechanical properties of materials.

The invention belongs to the technical field of laser precision machining and control, and particularly relates to a femtosecond laser single-point trigger control system and method based on subnanosecond synchronization, and the method comprises the following steps: S1, building a system synchronization clock locked with a femtosecond laser pulse signal phase; the specific mode of establishing the system synchronous clock is that phase locking is carried out on pulse synchronous signals or frequency division signals output by an internal high-frequency clock source and a femtosecond laser source through a digital phase-locked loop technology, and the low-jitter system synchronous clock which is strictly synchronous with a laser pulse sequence is generated. According to the invention, a system clock locked with a laser pulse phase can be generated through a digital phase-locked loop, and the influence of inherent frequency drift of a laser and circuit delay temperature drift is effectively overcome by combining real-time delay calculation based on a prediction algorithm and a high-resolution DDS delay line technology; the synchronization precision between the triggering moment of the single pulse and the external instruction is stabilized at the subnanosecond level, and the requirement of leading-edge application for the extreme time sequence precision is met.

A layered pulse generator for a vertical-cavity surface-emitting laser (“VCSEL”) driver is disclosed consisting of three elements: a low-speed pulse generator, a high-speed pulse generator, and a pulse generator selector, all of which are on-chip with the VCSEL driver. By providing these elements on-chip, overall system power and complexity are reduced while allowing for significantly higher pulse train frequencies compared with known systems. The high-speed pulse generator is capable of generating pulses faster and with higher resolution than that of the low-speed pulse generator. The high-speed pulse generator uses multiple clock outputs, phase shifted, and synthesized into a single pulse waveform capable of wide-ranging frequencies, duty cycles and pulse counts.

The invention provides composite laser shock peening equipment and a turbine blade laser shock peening method. The composite laser shock peening equipment comprises a first laser, a second laser, a third laser and a fourth laser, wherein the first laser outputs large-energy laser shock with single pulse energy larger than 1J to a first target area; the second laser outputs small-energy laser shock with single pulse energy at dozens of to hundreds of mJ levels to a second target area; the movement system is used for clamping and moving the to-be-machined part to the first target area or the second target area; the water restraint loading system is used for applying a water restraint layer; and the control system is used for adjusting working parameters of the modules. The invention further provides a turbine blade composite laser shock peening method implemented through the equipment, and the problem that double requirements of improvement of deep residual compressive stress and improvement of high surface residual compressive stress cannot be considered in a single process mode is solved through a large-energy and small-energy composite laser shock peening process.

The invention provides a sample positioning method suitable for an X-ray free electron laser monopulse experiment, and relates to the field of X-ray free electron laser experiments. The method comprises the following steps: step 1), acquiring an initial sample image of a sample to be detected; step 2), processing the initial sample image to obtain a target sample image; 3) identifying the contour of the target sample in the target sample image, and obtaining the pixel coordinates of the target sample; 4) performing visual proportion calibration on the target sample image to obtain a visual proportion coefficient; 5, based on the visual proportionality coefficient and the pixel coordinates of the target sample, the positioning coordinates of the target sample on the experimental platform are calculated in combination with datum point information.According to the method, accurate coordinate mapping and positioning can be achieved, the experimental performance is improved, and automation of the experimental process is promoted.

The application belongs to underwater acoustic detection technology, and particularly relates to a sonar single-pulse three-dimensional imaging method based on an array element, a storage medium and an electronic device. The method comprises the following steps: constructing a transmitting-receiving array element system, a first array element transmits and receives signals, and the remaining array elements only receive signals, a rectangular coordinate system is established with the first array element as the origin, and the remaining array elements are located on the coordinate axes; a single echo signal is obtained after a transmitted signal is reflected by a single detection target and received by a pth array element, and frequency domain sampling signals of the single echo signal are obtained through orthogonal mixing, pulse compression and Fourier transform processing; the frequency domain sampling signals of the pth array element are the sum of frequency sampling signals of echo signals at M distance gates; the distance of the detection target to the array element is calculated according to the frequency domain sampling signals, the included angle of the detection target with x, y and z is obtained according to a geometric relationship, and a three-dimensional imaging result of the detection target is determined. The application can realize three-dimensional imaging with a single pulse, reduces manufacturing cost, and has low requirements on the moving precision of the sensor.

The invention provides an ultrashort pulse laser ceramic grading method and equipment for realizing the method. The method comprises the following steps: a) adopting an ultrashort pulse laser beam which is generated by a specific SESAM passive mode-locking seed laser and a regenerative amplifier and has the pulse width of 1-15 ps and the monopulse energy of 10 mu J-1 mJ; b) focusing the ultrashort pulse laser beam into a processing light spot with the light spot diameter of 5-50 microns through a light beam shaping transmission module; c) controlling the focused laser beam to perform grain-dividing path processing on the surface of the ceramic workpiece at a scanning speed of 10-1000 mm / s to realize grain-dividing joint cutting with a depth-to-width ratio of more than 10: 1; according to the method, the energy difference between single pulses is smaller than or equal to + / -2%, the difference of peak power between the pulses is smaller than or equal to + / -3%, and the method is stable in working performance, high in consistency, short in action time / low in damage and high in machining precision.

The invention discloses an intelligent control system and method for a high-power laser driving power supply, and relates to the field of laser control, the method comprises the following steps: transmitting pulse detection laser, presetting the pulse width, repetition frequency and monopulse energy, calculating the loss ratio of a spectroscope through an integrated infrared temperature sensor, an optical power meter and the spectroscope, and calculating the power consumption of the spectroscope; basic parameters such as the initial temperature, the reflection power, the melting temperature and the temperature reflection correlation parameters of the reflecting material are obtained, and a database is built; emitting continuous working laser, calculating an energy density conversion coefficient and a reflection power peak value, and performing associative storage; detecting the center temperature of a material light spot in real time, predicting real-time reflection power by combining a reflection power peak value, and dynamically adjusting the actual power of working laser according to the temperature, a reflection power threshold value and an adjustment coefficient; and monitoring the temperature change rate and the reflection power, and if the temperature change rate and the reflection power exceed a safety threshold, early warning and stopping laser. According to the method, reflected laser dynamic control is achieved, laser energy output stability and machining precision are improved, and reliable system operation is guaranteed.

The present application relates to radar signal processing technical field, specifically provide a kind of staggered pulse repetition interval time-frequency domain dual-polarized radar detection variable estimation method, comprising: in frequency domain, the estimation of echo signal-to-noise ratio, reflectivity factor, differential reflectivity of horizontal / vertical polarization based on power spectral density;And the estimation of average Doppler velocity and velocity spectrum width;In time domain, after ground clutter filtering based on odd-even pulse, respectively, odd-even pulse correlation parameter estimation is carried out, so that two detection variables of dual-polarized radar correlation coefficient and differential propagation phase shift of odd-even pulse are obtained respectively, then odd-even combination can obtain the estimation result of accurate correlation coefficient and differential propagation phase shift.The present application realizes the accurate estimation of dual-polarized radar multi-class detection variable, ensures that estimation result is not disturbed by ground clutter interference, simultaneously adapts single pulse repetition interval and staggered pulse repetition interval two working modes, improves the reliability and applicability of radar detection.

The application discloses a self-task planning method for quick maneuvering rendezvous imaging of a spatial space target, and comprises the following steps: step one, multi-pulse control sequence planning: according to task requirements and considering determination of an orbit requirement, a multi-pulse control sequence is given, and the first control is implemented autonomously on the satellite; step two, closed-loop control sequence planning: after the i-th control is finished, the remaining N-i control sequences are given in combination with the orbit of the satellite after control and the orbit of the target, and the i+1-th control is implemented; wherein, i is greater than or equal to 1 and less than or equal to N-2, and the total control times are N; step three, single-pulse transfer planning: after N-1 control is finished, the last control velocity increment is calculated by using a Lambert transfer method in combination with the orbit of the satellite after control and the orbit of the target, and the N-th control is implemented; and step four, imaging task planning. The closed-loop control planning method is given by considering the influence of control errors and orbit errors, the method can ensure that the planning result of each time is basically consistent with the first planning, and the final rendezvous precision requirement is met.

A radiation detector that suppress a double count which occurs by detecting a single pulse duplicately with a plurality of counters in counter switching, and can acquire highly accurate data, is configured to detect radiation in continuous exposure, comprises a sensor for generating a pulse when a particle of radiation is detected, a plurality of counters provided for counting the pulses, a setting holding circuit for holding a setting of an off-time for turning off any of the plurality of counters, and a control circuit for switching the counter performing counting the pulses after a lapse of the off-time with respect to a trigger signal.

The application relates to a light polarization effect detection method of a SERF atomic spin gyroscope. 3 The atomic spin system of He, 2, the pumping light path is turned on, polarization operation is carried out on the two kinds of gases in the atomic gas chamber, the transmission of the electron angular momentum to the nuclear spin angular momentum is realized; 3, the detection light path is turned on, and the light signal is detected; 4, a single pulse disturbance of an alternating magnetic field is applied in the y direction, the K atom is deflected at a small angle, the Larmor precession is generated, the K and 3 The strong coupling effect of He atoms, the precession frequency of the K atoms under different main magnetic fields is linearly fitted, the slope value of the linear fitting is used to calculate the electron spin polarization rate, the intercept value when the applied main magnetic field value is 0 is used to calculate the equivalent magnetic field generated by the nuclear spin, and the direct and indirect polarization effects of the pumping light on the two kinds of atoms are detected by the slope and the intercept value. The effects of the two kinds of atoms polarized directly and indirectly by light are presented in the form of linear numerical fitting.

The invention discloses a processing method for a copper-clad ceramic substrate, which relates to the technical field of copper-clad ceramic substrate processing, and comprises the following steps of: taking a pre-treated copper-clad ceramic substrate, introducing nitrogen, and carrying out layered progressive micropore processing on an exposed aluminum oxide ceramic substrate of the pre-treated copper-clad ceramic substrate through picosecond laser to form micropores; each micropore is divided into an inlet layer, a middle layer and an outlet layer from top to bottom; the layer number of the micropores, the thickness of each layer of the micropores and the pulse width are controlled, and a light spot and long-focal-depth lens is adopted; adjusting monopulse energy and frequency parameters of picosecond laser, and punching an inlet layer; adjusting monopulse energy and frequency parameters of picosecond laser, and punching the middle layer; and adjusting monopulse energy and frequency parameters of the picosecond laser, and punching the outlet layer to obtain the copper-clad ceramic substrate. In the middle layer, the monopulse energy is gradually increased, and it is ensured that the material is evenly removed; at the inlet layer and the outlet layer, energy is reduced, and cracks caused by stress generated instantly when the material is punctured are avoided.

The invention discloses a torque control method and device, equipment, a storage medium and a program product, and relates to the technical field of motor control, and the method comprises the steps: determining a target pulse width based on a preset pulse width and a preset pulse width change coefficient in response to a torque control instruction, and determining a torque amplitude value based on the target pulse width and a preset torque amplitude value; generating a target pulse modulation signal, and performing torque control based on the target pulse modulation signal; under the condition that the preset torque amplitude is the same and the target pulse width is greater than the preset pulse width, the target area of the target pulse modulation signal in the single pulse period is the same as the area of the preset pulse modulation signal in the single pulse period; if yes, reducing the corresponding torque in a period of time starting from the pulse starting moment and / or a period of time before the pulse ending moment; therefore, the shaking or NVH problem of the whole vehicle is fundamentally relieved, and the driving comfort of the vehicle is improved.

The application discloses a kind of scintillator decay time test methods based on waveform sampling, the steps of test method include: scintillator is coupled to the optical window of photomultiplier tube placed in shielding box, using radioactive source excitation sample, open oscilloscope automatic acquisition not less than 100 pulse signals and transmission to control computer;Pulse waveform data acquired by oscilloscope is handled calculation, obtains the decay time constant corresponding to single pulse data;The above steps are repeated for processing all collected pulse data, obtain decay time constant set;With decay time constant set histogram, data should present normal distribution;Using Gaussian function to the normal distribution is fitted, the decay time value corresponding to the peak obtained is the decay time of the sample.The application can accurately test the decay time of different scintillating materials, especially suitable for high-throughput decay time measurement.

The invention discloses a monopulse phase comparison tracking signal processing method based on a digital beacon receiver, and relates to the technical field of radio orientation, and the method comprises the steps: carrying out the antenna pointing deviation analysis of a shipborne communication-in-motion antenna according to the predicted ship attitude information in a preset time window, and obtaining a predicted pointing deviation angle sequence; carrying out feature extraction to obtain a directional deviation trend feature, and determining the resolving complexity of four paths of radio frequency signals of the shipborne communication-in-motion antenna; dynamically configuring the phase comparison algorithm processing precision, the filtering processing mode and the signal compensation mechanism of the digital beacon receiver, and generating an adaptive signal resolving process; and according to an adaptive signal resolving process, resolving the continuous wave satellite downlink beacon signal in the preset time window through a digital beacon receiver to obtain a monopulse phase comparison tracking signal, and regulating and controlling the orientation and pitching of the shipborne communication-in-motion antenna in real time. According to the invention, the technical problem of poor radio orientation effect in the prior art is solved.

The invention discloses a detection method, which is used for carrying out connection detection between bearing equipment and electronic equipment, and comprises the following steps: when a first electric connector of the bearing equipment and a second electric connector of the electronic equipment are switched from non-connection to connection, outputting a monopulse signal; detecting the single pulse signal; and if the monopulse signal is detected, determining that the electronic equipment is accessed to the bearing equipment according to the monopulse signal. The invention further discloses a detection device, a storage medium and bearing equipment, and through the detection method, the electronic equipment, the bearing equipment and the storage medium, the connection confirmation mode between the electronic equipment and the bearing equipment can be optimized.

The application discloses a kind of three-dimensional radar low altitude multipath detection and elevation dynamic measurement method of double channel, and the adaptive decision threshold of multipath decision model is constructed in combination with real-time signal-to-noise ratio, so that the judgment of target echo complex signal can be accurately identified the occurrence and end of multipath interference like " switch ", when target echo is interfered by multipath, start the elevation measurement method for multipath interference, significantly improve the environmental adaptability and robustness of radar;The imaginary part characteristics of complex single pulse ratio are used in combination with the adaptive threshold of signal-to-noise ratio, which is more accurate than the simple distance threshold in identifying the multipath state, with higher detection accuracy.The application uses the characteristics that phase information is distorted but still maintains segmented monotonicity under multipath environment, first locks the subdivided monotonic interval where the target is located, and then uses high-sensitivity amplitude information to perform table lookup inversion in the interval, without changing the 1T2R hardware architecture, the problem of angle measurement error caused by multipath interference is solved.

This invention discloses a control method and an exposure system for an exposure system. The control method includes: acquiring the operating parameters of the exposure system and the exposure dose input value of the photosensitive material of the exposure system; obtaining the single-pulse emission energy of the pulsed laser based on the operating parameters and the exposure dose input value; acquiring the position synchronization signal of the motion platform; controlling the pulsed laser to emit laser light based on the position synchronization signal and the single-pulse emission energy; and controlling the flip state of the spatial light modulator based on the position synchronization signal. This method solves the problem of excessively thick horizontal lines caused by the increased scanning speed of the motion platform by controlling the output laser pulses of the pulsed laser, effectively improving the productivity of the exposure system, ensuring the accuracy of the exposed pattern, and improving the accuracy of the exposed pattern and the utilization rate of laser energy due to the use of a pulsed laser.

The application provides a kind of dynamic disturbance force calibration mechanism and system of vibration source, the system includes calibration mechanism and adjusting mechanism, the calibration mechanism includes linear slide rail, first slider, counterweight, fixed frame, force sensor and impact head.In use, first by adjusting mechanism makes the impact head of calibration mechanism perpendicular to the face where calibration point is located, and ensures that the contact body of impact head is aligned with calibration point, so that impact head provides single pulse to measurement platform or vibration source.The calibration system designed by the present application can effectively reduce the error caused by inaccurate human knocking calibration point, and improve the accuracy when measuring dynamic disturbance force.

This invention provides a method for eliminating bonding interface defects, a module for eliminating bonding interface defects, a semiconductor device processing apparatus, and a computer-readable storage medium. The method for eliminating bonding interface defects includes the following steps: locating at least one bubble defect on the bonding interface of a grain-wafer bond; and applying a pulsed high-energy beam from the grain side of the bonding interface to the at least one bubble defect to form at least one venting micro-via penetrating the corresponding grain above the bubble defect, wherein the peak power of the pulsed high-energy beam is not less than 10 kW, and its single-pulse energy is not greater than 1 mJ.

The invention discloses a high-dynamic high-frame-rate signal processing method for a long-distance single-photon laser radar, and belongs to the field of laser radar signal processing. The method comprises the following steps: acquiring the newest ranging results of N laser pulses from a single-photon laser radar to output a low-frame-frequency accumulated target average distance and target average speed; obtaining a target distance measurement result of the latest single laser pulse, and calculating a distance threshold range and a predicted distance value based on the target average distance and the target average speed; and determining the number of the target ranging results satisfying the distance threshold range, and determining the high-frame-rate monopulse distance in combination with the predicted distance value. Therefore, according to the scheme, the distance threshold range and the predicted distance value can be calculated through the target average distance and the target average speed accumulated at the low frame frequency, the high-frame-rate monopulse distance can be output in combination with the latest single laser pulse target distance measurement result, high-frame-frequency distance output can be carried out on the high-dynamic target to be measured, and the target distance measurement accuracy is improved. And the high-frame-frequency distance measurement requirement is met.

The application provides a method for analyzing a 4H-SiC femtosecond laser processing optimal energy interval, and belongs to the technical field of engineering optics based on computer data processing. First, the evolution of electron density, lattice temperature and electron temperature under irradiation is simulated by constructing a three-dimensional model and an electron density cumulative rate equation and a double-temperature model, so that the lattice modification threshold and the ablation threshold are determined. Then, a plurality of experimental data points are selected in the interval for single-pulse laser processing, the surface morphology, removal depth and removal radius of each data point are counted by using conventional characterization methods, and the accuracy and non-thermal removal threshold of the model are determined by observing the number of surface spatter particles and the flux calculation of the morphology edge. Further, the optimal structure modification energy interval, cold processing interval and hot ablation processing interval of 4H-SiC are determined. The application uses fewer sample damage test times, improves the sample utilization rate, shortens the research period, and accelerates the flux screening of the optimal laser processing.