286 results about "Pulse time" patented technology

The invention belongs to the technical field of photoelectronics, and particularly relates to a wide-spectrum narrow-linewidth semiconductor mode-locked laser, and the collaboration of a saturable absorption region SA and a resonator is reflected in time domain-frequency domain dual optimization. And the resonator optimizes the frequency domain characteristics through nonlinear broadening, phase synchronization and mode purification. The SA adjusts a mode locking threshold value in real time through dynamic bias voltage, the pulse energy stability is ensured, dispersion management of the resonator balances the SPM and group velocity dispersion, spectrum splitting is avoided, and the dissipative soliton form is maintained. Besides, due to heterogeneous integration of the InP-based SA and the SiN-based resonator, wafer bonding of the InP-based SA and the SiN-based resonator is realized, high-efficiency energy transfer is realized through the low-loss conical waveguide, a high-performance frequency comb with a wide spectrum and a narrow pulse width is output, and the high-performance frequency comb can be widely applied to the fields of ultrafast optics, coherent light communication and precision spectroscopy.

The invention discloses a battery fault diagnosis method and device, and belongs to the technical field of battery management. The method comprises the following steps: synchronously acquiring multi-dimensional signals in a battery operation process through a multi-modal sensor array; performing encoding processing on the multi-dimensional signal through a pulse encoder to obtain a standardized pulse time sequence; based on a federated transfer learning framework, training the quantum pulse neural network in combination with a physical constraint loss function to obtain a trained battery fault diagnosis model; inputting the standardized pulse time sequence into the battery fault diagnosis model, and calculating a battery fault category and a thermal runaway probability through quantum inference; and triggering a corresponding security policy according to the thermal runaway probability and a preset threshold. By adopting the technical means of multi-mode signal fusion, quantum calculation acceleration and distributed learning, accurate and rapid diagnosis of battery faults is realized, and the method has the advantages of high precision, low delay and low power consumption.

The invention discloses a collaborative light regulation and control decision method and system, and relates to the technical field of intelligent regulation and control of plant factory light environments, and the system comprises a plant physiology monitoring unit which is provided with a non-invasive microelectrode array and a hyperspectral imager; and the environment sensing unit is used for collecting illumination intensity, spectrum, temperature, humidity and carbon dioxide concentration data. According to the collaborative light regulation and control decision-making method and system, fusion of multi-source heterogeneous data is realized through a pulse time sequence coding mechanism, and the problem that environmental parameters and plant physiological statuses are difficult to collaboratively analyze in the prior art is solved; based on a dynamic optimization architecture of double-alliance Nash equilibrium, autonomous collaborative decision-making of spectrum parameters can be completed in a short time, and compared with a traditional preset light formula, the response speed is improved; decision effectiveness can be synchronously guaranteed on the virtual model and biological entity level, the light suppression misjudgment rate is reduced, and meanwhile the plant light energy utilization rate is stably improved.

The invention discloses a narrow pulse suppression method and device for dynamic adjustment of dead time, a medium and a controller, and the method comprises the steps: presetting the dead time of M periods in the future according to the real-time state of a motor and the dead time and current change rate of the first N periods, and outputting a working condition label at the same time, N and M being positive integers; determining target dead zone time Td according to the working condition label and the dead zone time of the M periods in the future; determining a dead zone time ratio Dd according to the target dead zone time Td, constructing an interval section of a PWM signal according to the dead zone time ratio Dd and a narrow pulse time ratio Dp, and constructing an upper bridge arm duty ratio function Dt and a lower bridge arm duty ratio function Db corresponding to each interval section according to the dead zone time ratio Dd and a duty ratio instruction Dm of the PWM signal; according to the interval section where the duty ratio instruction Dm of the PWM signal is located, a duty ratio function of the corresponding interval section is called, and a target PWM signal is output.

The invention provides a battery charging and discharging pulse frequency detection method and system, and the method comprises the steps: dividing a pulse current signal of a target battery during charging and discharging into a plurality of pulse signal segments, and determining the static deviation of the current of the target battery during charging and discharging based on the local current characteristics of each pulse signal segment; determining the time domain positioning error of the time interval through the static offset and the pulse width of the pulse current signal; monitoring the surface temperature of the target battery during charging and discharging, and determining the disturbance characteristics of the temperature of the target battery during charging and discharging to the current according to all the monitored temperatures and the pulse current signal; and performing pulse identification on the pulse current signal according to all the time domain positioning errors and disturbance characteristics to obtain an effective pulse time mark sequence of the target battery during charging and discharging, and determining an effective pulse frequency of the target battery during charging and discharging based on the effective pulse time mark sequence. According to the scheme, the influence of current signal drift on pulse frequency detection in the battery charging and discharging process can be reduced.

The invention discloses a method and device for determining distance information of flight equipment and a storage medium, and relates to the technical field of microwave landing system measurement. The method comprises the following steps: acquiring initial distance information of target flight equipment; predicting a target position of the target flight equipment at the next moment based on the initial distance information; based on the target position, determining updated distance information of the target flight device, the updated distance information being used for indicating information from the target flight device to the ground when the target flight device is located at the target position; based on the updated distance information, pulse time difference information of the target flight equipment is determined, and the pulse time difference information is used for indicating time difference information of a pulse signal sent by the target flight equipment to the ground beacon station and a corresponding response pulse signal; and determining target distance information of the target flight equipment relative to the ground beacon station based on the pulse time difference information. According to the invention, the precision of distance measurement of the flight equipment is improved.

The invention relates to the technical field of mechanical fault diagnosis, in particular to a mechanical fault diagnosis method and system based on a pulse neural network. According to the invention, a fault diagnosis network is constructed, and the fault diagnosis network comprises a pulse time-frequency repair module, a pulse space-time attention module and a pulse residual network; wherein the pulse time-frequency repairing module comprises a time-frequency convolution layer and a pulse repairing sub-module; time-frequency distribution characteristics of the collected mechanical vibration signals are extracted by using a time-frequency convolution kernel, the time-frequency distribution characteristics are input into a pulse repairing sub-module, and a time-frequency characteristic group of a pulse residual network time step length number is output; inputting each time-frequency feature group into a pulse space-time attention module, and extracting key time-frequency features of each time-frequency feature group; and taking the key time-frequency characteristics of each time-frequency characteristic group as the input of each time step length of the pulse residual network, and outputting a prediction fault category label. According to the invention, the mechanical fault diagnosis precision is effectively improved.

The invention belongs to the technical field of invisible coding and anti-interference, and particularly relates to an invisible coding anti-interference laser coding and decoding system based on a sub-pulse phenomenon, which comprises a laser transmitting module, a signal processing module and a pulse information comparison unit. The passive Q-switched laser generates a main pulse and a sub-pulse with a preset double-peak interval, a main pulse signal delayer is used for coordinating a double-pulse time sequence, differential gain amplification is carried out on the main pulse and the sub-pulse, double-peak interval information is reconstructed through electric signal synthesis, an actual interval is compared with preset encoding information, and the time sequence of the main pulse and the sub-pulse is calculated. An anti-interference function is realized, laser stability is guaranteed through a side pumping structure in combination with a temperature compensation mechanism, concealment and anti-deception capability of coding and decoding signals are enhanced by using a double-peak interval invisible coding characteristic, and the system has the advantages of high anti-interference performance, dynamic and adjustable coding, high environmental adaptability and the like. The problem that a traditional laser signal is easy to intercept or interfere can be effectively solved.

The invention discloses a highly integrated V-band broadband multichannel multimode detector front-end chip, which belongs to the field of millimeter wave integrated circuits and comprises a phase-locked loop module PLL, a radio frequency local oscillator chain module LO, a dual-transmitting channel module TX, a dual-receiving channel module RX, a pulse time sequence control module and an SPI configuration interface module. According to the invention, the problems of difficulty in broadband signal generation, serious multi-channel phase mismatch, complexity and low efficiency of a multi-mode system and difficulty in consideration of transmission link speed and power consumption in the existing V-band detector chip are solved.

The invention relates to a standardized integrated access method and system for operation energy efficiency data of marine equipment, and the method comprises the steps: constructing an energy efficiency data standardization system which comprises equipment types and core energy efficiency data, and generating a unified data identifier of the operation energy efficiency of the marine equipment through a five-level coding rule; first and second core energy efficiency data measurement values of marine equipment with a standard interface and without a standard interface are collected in a wired and wireless mode respectively, and after protocol conversion and GPS second pulse time synchronization, outrange cleaning and null interpolation preprocessing are carried out; mapping the multi-source data into a marine equipment operation energy efficiency unified data identifier through a mapping rule; the current working condition is judged based on the ship operation state information, the time window width and the polynomial order are dynamically adjusted, high-order polynomial fitting processing is conducted on the data subjected to unified identification, and high-quality standardized energy efficiency data are output and transmitted to the ship energy efficiency management platform; and adaptive quality control and standardized integrated access of the multi-source heterogeneous energy efficiency data are realized.

The invention discloses a quantum phase-locked detection method based on entanglement enhancement, and the method comprises the steps: encoding quantum bits in a ground state and an excited state, and preparing the quantum bits into an initialized quantum state; loading a periodic multi-pulse sequence to act on the quantum bits; and loading a carrier pulse resonating with the ground state and the excited state, detecting the final quantum state of the quantum bit, and comparing curves of each component of the measurement density matrix and the theoretical density matrix changing along with the pulse time interval of the periodic multi-pulse sequence to obtain the half cycle and the amplitude of the sine wave to be measured. According to the method, measurement noise under the condition that the rotation angle and the detuning error exist can be effectively restrained, high measurement precision is kept under the condition that the rotation angle and the detuning error exist, and the robustness enables the method to be more reliable in practical application.

The embodiment of the invention provides an auxiliary card searching module and method and near field communication equipment. Wherein the auxiliary card searching module comprises a pulse detection unit, a control unit and a modulation unit; the control unit is respectively connected with the pulse detection unit and the modulation unit; the pulse detection unit is used for generating a trigger signal within a preset duration based on a response signal of an equipment antenna of the slave equipment; the response signal is generated by the device antenna of the slave device in response to a radio frequency signal sent by the master device; the preset time length is smaller than the pulse time length of a radio frequency signal sent by the main equipment; and the control unit is used for controlling the modulation unit to perform state switching according to the trigger signal so as to promote the main equipment to enter a polling mode.

The invention relates to the technical field of vibration testing, in particular to a vibration testing method and system for millet processing equipment, and the method comprises the following steps: synchronously collecting an original vibration signal and a key-phase signal at a motor shaft of the millet processing equipment, carrying out the equal-angle interval re-sampling of the original vibration signal according to the pulse time of the key-phase signal, and obtaining a re-sampling signal; and constructing a rotating speed synchronization segmented signal matrix composed of a plurality of rotating speed periods, and superposing and averaging all signal segments in the rotating speed synchronization segmented signal matrix to obtain a rotating speed synchronization period signal. According to the method, the original vibration signal and the key phase signal are synchronously collected at the motor shaft, re-sampling at equal angle intervals is executed according to the pulse time of the key phase signal, superposition average processing is performed after the rotation speed synchronous segmentation signal matrix is constructed, synchronous suppression of rotation period disturbance is achieved, and therefore purer periodic vibration characteristics are obtained.

The invention relates to the technical field of radars, in particular to a weather radar distance resolution calibration method and system. The method comprises the following steps: collecting oversampling original baseband I / Q data of a point target in a plurality of continuous pulse periods; determining a pulse signal-to-noise ratio, and screening out effective pulses according to a threshold value; carrying out sub-sampling stage time alignment on the effective pulses based on cross-correlation analysis, and carrying out incoherent averaging on power module values of all the aligned pulses to generate an average pulse power envelope; converting the average pulse power envelope to a logarithm domain, and selecting discrete data points in a main lobe region; according to the discrete data points, a nonlinear least square method is adopted to carry out iterative fitting on the generalized Gaussian mathematical model, and a continuous analytic function describing the pulse envelope is obtained; according to the continuous analytic function, determining a pulse time width when the power is reduced to a peak value of-6dB; and determining the real distance resolution according to the pulse time width. The measurement robustness is improved, and sub-meter calibration precision is achieved.

The invention relates to the technical field of electric digital data processing, and discloses an Internet of Things water meter operation mode monitoring method, which comprises the following steps: acquiring an original pulse sequence acquired by a sensor and extracting a pulse time interval sequence; mapping based on the pulse time interval sequence and the system structure characteristic parameters to obtain an equivalent response numerical sequence; constructing a feature vector unit according to the evolution slope between the adjacent numerical points; extracting slope symmetry features of the feature vector units and matching the slope symmetry features with a physical causal criterion so as to separate continuous feature signals and asymmetric noise signals; according to the method, fluid kinetic energy time domain evolution characteristics are represented by using a nonlinear mapping mechanism, accurate decoupling of a real water load and a pipe network disturbance pseudo signal is realized through physical causal verification, the difficult problem of micro flow identification under a complex working condition is effectively solved, and the monitoring robustness of a system is enhanced.

The invention discloses a synchronous self-calibration cable distributed partial discharge detection calibration positioning device and method, and relates to the technical field of power system cable insulation state detection. The device comprises an upper computer and at least two acquisition and detection systems, for any acquisition and detection system, the detection module receives the control signal and outputs a synchronous calibration signal; the pulse calibration unit excites a calibration pulse signal on the cable shielding grounding wire according to the synchronous calibration signal, and takes the obtained excitation pulse signal as a time reference signal; the detection module determines a pulse time difference based on the time reference signal; the upper computer calibrates the adjacent acquisition and detection systems according to the pulse time difference, and performs waveform comparative analysis on acquired data acquired after calibration to obtain an analysis result; the analysis result is used for realizing detection positioning based on waveform time delay. The invention aims to realize synchronous function calibration and partial discharge detection positioning of cable distributed partial discharge detection.

A water meter bearing wear state monitoring method and system based on a flow rate working condition relates to the field of electric digital data processing, and the method comprises the following steps: monitoring the generation frequency of a metering pulse on a target water meter, and determining whether the current metering working condition of the target water meter is a high flow rate working condition or a low flow rate working condition based on the generation frequency; counting a first pulse time interval sequence under the low flow speed working condition, and calculating a dispersion characteristic value of the first pulse time interval sequence as a first state characteristic value; counting a second pulse time interval sequence under the high flow rate working condition, and calculating a dispersion characteristic value of the second pulse time interval sequence as a second state characteristic value; based on the first state characteristic value and the second state characteristic value, calculating a working condition response index representing the wear degradation effect of the water meter bearing on the target water meter; when the working condition response index is larger than a preset abrasion judgment threshold value, abrasion early warning information corresponding to the target water meter is generated. By implementing the application, the water meter maintenance cost can be reduced.

The invention relates to the technical field of digital-to-analog conversion, in particular to a large-dispersion compact chirped pulse time domain compression method, which comprises the following steps of: projecting a broadened chirped pulse to a first grating in an inclined incidence mode, and moving adjacent back and forth diffraction spots point by point in a direction parallel to a grating scribed line; the first grating and the second grating are oppositely arranged in parallel to form a double-grating group; controlling the chirped pulse to perform multiple back-and-forth diffraction between the first grating and the second grating to obtain a preset large dispersion amount; an angular dispersion steering module is arranged on a back-and-forth diffraction light path of the chirped pulse, and vertical angular dispersion introduced due to oblique incidence is turned into horizontal angular dispersion. An angular dispersion compensation module is arranged on a light path before the chirped pulse is output, and the angular dispersion accumulated by multiple back-and-forth diffraction is offset and compensated. According to the method, on one hand, the dispersion amount several times that of a traditional pulse time domain compressor can be obtained, on the other hand, the compact design of the structure of the compressor can be achieved, and the method has important engineering application value.

The invention discloses a method for testing trajectory transport parameters of a pulse-excited transistor at an ultralow temperature, and belongs to the field of semiconductor device characterization. According to the method, the self-heating effect intensity of a device is actively controlled by adjusting the pulse time at the environment temperature lower than 10K, and the source-drain saturation current of the transistor in different self-heating states is measured; the true temperature of the channel is inverted by using source-drain saturation current in different self-heating states; and calculating the back scattering probability and the ballistic transport efficiency by researching the dependency relationship between the changes of the threshold voltage and the source-drain saturation current and the channel temperature. According to the method, parameter extraction errors caused by inconsistency of the environment temperature and the channel temperature in a traditional method are solved, the intrinsic ballistic transport efficiency parameters of the device can be accurately obtained, and the method is suitable for high-performance planar transistors with silicon, germanium and III-V group compounds as carrier channels, fin type three-dimensional grids and transistors with ring gate-nanowire structures.

The touch equipment comprises a touch panel and a touch driving device. The touch driving device drives the touch panel. The touch driving device comprises a driving signal generating circuit and a reading circuit. The drive signal generation circuit generates a drive signal for driving the touch panel, wherein the drive signal includes a first pulse time and a second pulse time for driving a same touch sensor in the touch panel. The drive signal generation circuit changes at least one waveform parameter of the drive signal with a first change strategy such that the at least one waveform parameter of the first pulse time is different from the at least one waveform parameter of the second pulse time. The reading circuit reads a touch event sensing result of the touch panel.

The utility model belongs to the field of distributed optical fiber sensing, and particularly relates to a compact high-signal-to-noise-ratio dark pulse BOTDR (Brillouin Optical Time Domain Reflectometer) system for engineering, which comprises a laser, and the output end of the laser is connected with a first photoelectric coupler which is used for dividing light emitted by the laser into upper light and lower light. The dark pulse modulation system module is arranged, descending pump light is equivalent to a dark pulse through modulation, a computer controls dark pulse time slots so as to change pump pulse characteristics, a corresponding demodulation method is adopted in rear-end data processing, Brillouin frequency shift along a sensing optical fiber is obtained, and the Brillouin frequency shift is converted into Brillouin frequency shift along the sensing optical fiber. The lower limit of the spatial resolution of the method is equal to the fall time of the modulation system, and the spatial resolution can be greatly improved under the condition of improving the signal-to-noise ratio. In addition, due to narrow pulse width and low energy of the traditional bright pulse, an erbium-doped fiber amplifier (EDFA) is generally needed for signal amplification. Dark pulses are close to continuous light in most cases, and EDFA is not needed, so that the system design is simplified, and the cost is reduced.

A procedure for correcting a time variable (x) is used. spm ) described, which characterizes a reception time of an echo light pulse received during a LiDAR measurement in a temporal reference frame (40). The received echo light pulse originates from a scanning light pulse transmitted by a transmitter of the LiDAR system and reflected at at least one target. A measurement center point time parameter (x spm The temporal center point of the received echo light pulse is determined. A total measurement intensity quantity (A) is determined, which characterizes the total intensity of the received echo light pulse. A measurement pulse width quantity (w) is determined, which characterizes the temporal duration of the echo light pulse reception. An expected total intensity quantity (A) is determined. e ) is specified, which characterizes the total intensity of an ideal echo light pulse. An expected pulse width quantity (w) e) is specified, which characterizes the time length of the ideal echo light pulse. A center-of-mass correction parameter (Δ) sp ) is calculated using the total measured intensity (A), the measured pulse width (w), and the expected total intensity (A e ) and the expected pulse width size (w e ) determined. A corrected center of gravity time parameter (x spk ) is derived from the measurement center time parameter (x spm ) and the center of gravity correction quantity (Δ sp ) determined.

The application relates to an ANPC three-level converter and a narrow pulse elimination method and device thereof, and is characterized by comprising the following steps: collecting signal data of a converter to calculate initial comparison values of a pulse modulation module of the converter for generating a pulse width modulation wave; calculating a narrow pulse lower limit value T down and a narrow pulse upper limit value T up according to a clock frequency T clock , a dead time T s , a narrow pulse time T N and a pulse period T PRD of the pulse modulation module; when the initial comparison value is greater than the narrow pulse upper limit value T up , setting a final comparison value as the narrow pulse upper limit value T up ; when the comparison value is less than 0, performing positive processing on the initial comparison value to make the final comparison value a positive value; when the comparison value is less than the narrow pulse lower limit value T down , setting the final comparison value as 0; and generating a pulse width modulation wave for regulating the converter by using the final comparison value. The problem that narrow pulses easily cause damage to power devices in the converter is solved.

The invention discloses a time service synchronization method, a computer readable storage medium and electronic equipment, and the method comprises the steps: starting a high-frequency SPXO clock source in each preset period based on the timing of a low-frequency SPXO clock source, and enabling the high-frequency SPXO clock source to be aligned with a low-frequency clock moment after buffering; calculating the planned output time of the pulse time service signal by combining the high-frequency clock receiving window, the synchronous packet sending duration, the preset ToF correction window timing value and the latest ToF value; the synchronization packet sent by the host is received before the plan time, correction output time is determined according to the receiving moment, the ToF correction window timing value and the ToF value, and the host sends a pulse to the slave after sending the synchronization packet and passing through the ToF correction window; calculating correction and plan time deviation; performing clock taming on a low-frequency SPXO clock source and a high-frequency SPXO clock source through a multi-cycle deviation value to realize time service synchronization of the slave and the host; and then the high-frequency SPXO clock source is closed.

The invention provides an indoor field radar pulse time-sharing slicing and echo synthesis method. The method comprises the following steps: step 1, designing a radar pulse time-sharing slicing signal; setting the radar pulse signal as a linear frequency modulation signal, and performing time-sharing slicing: in order to ensure that the transmitted and received slice signals are not mutually coupled, enabling the pulse width to meet the condition that the back edge of the transmitted slice signal does not exceed the front edge of the received slice echo; step 2, echo synthesis design of slice signals; and carrying out time delay compensation on the mth section of slice echo, adding and synthesizing all the forward-moving slice echoes to obtain a complete target echo, and enabling the recovered target echo to pass through a linear frequency modulation signal matching filter to obtain a high-resolution one-dimensional range profile of the target. According to the method, time-sharing slicing processing is carried out on radar pulses, single-section slice signals are transmitted in a certain period, time delay compensation of slice echoes is carried out at a receiving end, then echo synthesis is carried out, and finally complete target echoes and a high-resolution one-dimensional range profile of a target are obtained.

The application discloses a reconfigurable processor and an execution method fusing neuromorphic and general computing, and comprises a total control module and an on-chip network module, wherein the on-chip network module comprises a control module, a pulse storage module, a weight storage module, a pulse time module, a LIF neuron module and a classification comparison module. The execution method comprises the following steps: acquiring an input data set; selecting a working mode of the on-chip network module according to the input data set; and performing data recognition processing on the input data set according to the working mode, and outputting a data recognition output result. The application realizes the working of a central processing unit (CPU) and a spiking neural network (SNN) in a single core, thereby improving the utilization rate of a heterogeneous core and reducing the delay of core-to-accelerator communication. The application can be widely applied to the technical field of neural network accelerator as a reconfigurable processor and an execution method fusing neuromorphic and general computing.

A laser device includes a laser oscillator configured to generate pulse laser light, an actuator configured to adjust a laser light parameter of the pulse laser light, and a laser control processor configured to correct an operation parameter value of the actuator so that a difference between a measurement value and a target value of the laser light parameter becomes small based on a change pattern of a pulse time interval of the pulse laser light continuously changing within a burst of burst oscillation in accordance with a command of an exposure apparatus, and control the actuator.

This document describes in detail a method for tuning the interaction strength (J) between at least two qubits (qb1, qb2) of a quantum computer (10), the method comprising the steps of: - applying a first periodic pulse sequence (1) to the first qubit (qb1), - applying a second periodic pulse sequence (2) to the second qubit (qb2), wherein, - the period (T) of the first periodic pulse sequence (1) is equal to the period (T) of the second periodic pulse sequence (2), - delaying the pulses (21) of the second periodic pulse sequence (2) relative to the pulses (11) of the first periodic pulse sequence (1), and - tuning the interaction strength (J) by controlling the time delay (Δt). Furthermore, the quantum computer (10) is described in detail herein.

The invention relates to the technical field of industrial data analysis, and discloses an original data feature analysis system in water meter detection, comprising: a pulse data aggregation unit for acquiring an original pulse time sequence; the time sequence difference processing unit is used for receiving the original pulse time sequence and executing first-order difference operation to generate a first-order time sequence difference value sequence; the feature decoupling shunting unit is used for executing logic locking by using a monitoring carrier environment baseline scalar, and dividing a first-order time sequence difference value sequence into a steady state processing channel and a transient analysis channel; the intrinsic mode mapping unit is used for pre-storing intrinsic mode feature vectors; the transient distortion judgment unit is used for extracting the frequency domain feature vector, executing orthogonal projection mapping with the intrinsic mode feature vector and outputting an effective transient distortion tensor, the problem of feature information entropy collapse of the high-frequency pulse sequential sequence in the dimensionality reduction aggregation process is solved, and a semantic gap between an information processing domain and a physical design domain is eliminated.

A laser system for multiphoton microscopy comprises a seeder oscillator, fast modulator, amplifier, second modulator, and optical parametric amplifier configured to produce pulses with variable pulse spacing temporally synchronized to a scanner having sinusoidal motion. The variable pulse spacing ensures each pixel receives substantially the same number of laser pulses, eliminating uneven energy distribution of fixed repetition rate systems. The scanner operates at 4-12 kHz frequencies while the seeder oscillator produces femtosecond pulses at 10-100 MHz with 10-100 ns pulse spacing. The optical parametric amplifier outputs wavelengths from 600-1900 nm, with 1300-1700 nm optimized for three-photon microscopy. Methods include synchronizing pulse timing to scanner motion and varying interpulse intervals across scan lines. For 8 kHz scanners with 512 pixels per line, the system achieves 32% energy reduction compared to constant pulse spacing while maintaining 100-150 mW average power on biological samples, preventing thermal damage and enabling video rate imaging.