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456 results about "Laser modulation" patented technology
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A phase modulator within a laser resonator of a single-frequency laser can be used for wavelength tuning, or for active mode locking (FM mode locking) of a laser. A phase modulation of a beam with moderate modulation strength is often used in laser frequency stabilization schemes, e.g. with the Pound–Drever–Hall method.
Net strain reduction in integrated laser-modulator
A semiconductor device including first and second epitaxial layers grown in a selective area growth region on a substrate includes an active layer or well layer comprising a first composition formed using a trimethylgallium precursor material and a barrier layer comprising a second composition formed using a triethylgallium precursor material. The use of the first and second compositions in the well layer and barrier layer respectively maximizes the strain in the well layer while simultaneously minimizing the net strain of the selective area growth region.
Owner:LUCENT TECH INC
Optical fiber switch
Optical fiber switches operated by electrical activation of at least one laser light modulator through which laser light is directed into at least one polarizer are used for the sequential transport of laser light from a single laser into a plurality of optical fibers. In one embodiment of the invention, laser light from a single excitation laser is sequentially transported to a plurality of optical fibers which in turn transport the laser light to separate individual remotely located laser fuel ignitors.The invention can be operated electro-optically with no need for any mechanical or moving parts, or, alternatively, can be operated electro-mechanically. The invention can be used to switch either pulsed or continuous wave laser light.
Owner:LOS ALAMOS NATIONAL SECURITY
Laser imaging radar device and distance measurement method thereof
ActiveCN103616696AFast ranging speedProbe cycle shortenedElectromagnetic wave reradiationEngineeringRange gate
The invention provides a laser imaging radar device and a distance measurement method thereof. The laser imaging radar device and the distance measurement method thereof aims at the problem that an existing distance range gate laser imaging radar is low in distance resolution. The laser imaging radar device comprises a laser device, a laser modulation unit, an optical antenna unit, a detecting unit, a data processing unit and an image processing unit, wherein the detecting unit is composed of a counter, a gate controller and an array detector, and the data processing unit is composed of an accumulator and a correlator. According to the distance measurement method, an information loading process is carried out on laser signals with constant amplitude by using a phase code pulse amplitude modulation mode. The laser imaging radar device and the distance measurement method thereof have the advantages that the equipment and the method combine the advantages of long detecting distances of the distance ranging gate layer imaging radar and the advantage of high distance measurement resolution of the pulse phase coding mode, and meanwhile the detect of low distance measurement resolution of the distance ranging gate layer imaging radar and the detect of low imaging speed of the pulse phase coding mode are avoided.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Image forming apparatus and semiconductor laser modulation driving apparatus
InactiveUS20050089069A1Guaranteed high-speed signal transmissionReduce swing of signalLaser detailsVisual representatino by photographic printingColor imageLatent image
A color image forming apparatus produces a latent image on a photosensitive body based on a signal output from a scanning light detecting part in response to detection of scanning light; a semiconductor laser modulation signal generating part includes a clock generating part and a clock modulation part; a semiconductor laser and a semiconductor laser driving part are provided for each color of yellow, magenta, cyan and black; and further, a plurality of the semiconductor lasers are provided for at least one color of yellow, magenta, cyan and black.
Owner:RICOH KK
Q-switched semiconductor laser
InactiveUS6215805B1High frequencyLaser optical resonator constructionOptical resonator shape and constructionRefractive indexElectron
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
Modulated laser light detector
ActiveUS7012237B1Accurate detectionAccurate measurementOptical rangefindersMaterial analysis by optical meansFull waveLaser light
A modulated laser light detector that converts laser light energy into electrical signals which exhibit a frequency that is substantially the same as the laser light modulation frequency, in which these signals allow the detector unit to determine a position where the laser light is impacting upon a photodiode array. A synchronous rectifier circuit is provided which, by use of a phase locked loop, converts a full-wave analog signal representative of the modulated laser energy into a half-wave analog signal, which is filtered and demodulated to generate a DC level that is indicative of the strength of the received laser light energy. At least two channels of these signals are used to determine the impacting position of the laser light energy.
Owner:TRIMBLE NAVIGATION LTD
Method for controlling brittleness Laves phases in laser additive manufacturing process of nickel-based high-temperature alloy
InactiveCN106077647AReduce heat buildupIncrease cooling rateAdditive manufacturing apparatusIncreasing energy efficiencyOptoelectronicsLaser source
The invention discloses a method for controlling brittleness Laves phases in the laser additive manufacturing process of a nickel-based high-temperature alloy. Firstly, laser additive manufacturing technological parameters are initially optimized, and a cooling medium is adopted for cooling the bottom of a base material; then a laser modulation technology is used for modulating a laser source, and superior laser modulation parameters are obtained, wherein the peak power of square waves ranges from 600 W to 1000 W, the pulse frequency of the square waves ranges from 10 HZ to 100 HZ, and the duty ratio of the square waves ranges from 0.3 to 0.6; the wave peak power of sawtooth waves ranges from 600 W to 1200 W, the wave trough power of the sawtooth waves is 0 W, and the pulse frequency of the sawtooth waves ranges from 10 HZ to 100 HZ; and according to the parameters of sine waves, the wave peak power ranges from 600 W to 1000 W, the wave trough is 0 W, and the pulse frequency ranges from 10 HZ to 100 HZ; and finally, laser additive manufacturing and forming of the nickel-based high-temperature alloy are conducted according to the above parameters, and a formed part with all small equiaxial dendritic structures and small discrete Laves phases is obtained. By means of the laser modulation method, the precipitation behavior of the Laves phases in the laser additive manufacturing process of the nickel-based high-temperature alloy can be effectively controlled, the cracking sensibility of parts obtained through laser additive manufacturing is reduced, and the microstructure is improved.
Owner:HUNAN UNIV
Method and apparatus for providing a modulation current
ActiveUS7154923B2Easy to adjustLaser detailsPulse modulationChannel length modulationFeedback circuits
Owner:INT BUSINESS MASCH CORP
X-ray pulsar navigation embedded simulation system based on semiconductor laser
InactiveCN101608919AEasy to compare and analyzeHigh precisionInstruments for comonautical navigationNavigation by astronomical meansData simulationPhoton emission
The invention discloses an X-ray pulsar navigation embedded simulation system based on a semiconductor laser, which comprises a data simulation unit, a photon emission unit, a photon detection unit and a navigation test unit. The data simulation unit simulates X-ray pulsar radiation signal data, and sends the X-ray pulsar radiation signal data to the photon emission unit; the photon emission unit uses simulation data to modulate light intensity of a laser modulation laser, and radiate lasers to the atmosphere; the photon detection unit receives the lasers of the photon emission unit from the atmosphere, filters non-laser spectra components in background sunlight, and sends the received lasers to the navigation test unit after carrying out counting on the received lasers; and the navigation test unit carries out noise elimination, pulse profile accumulation, pulse arrival time measurement treatment on the data of the photon detection unit, and utilizes time measurement data to carry out a navigation test. The invention can provide a complete simulation experiment platform for obtaining navigation signals, signal processing, time synchronization and navigation design verification of navigation signals.
Owner:XIDIAN UNIV
Structural material for modulation of terahertz waves
InactiveCN101943803AAchieve modulationGreat modulation depthNon-linear opticsVanadium dioxidePhase change
The invention discloses a structural material for the modulation of terahertz waves, which belongs to the technical field of electronics. The structural material comprises a medium substrate (2) and a vibratron array (1) attached to the surface of the medium substrate (2), wherein the medium substrate (2) is the medium material substrate highly transparent to the terahertz waves; the vibratron array (1) consists of a plurality of vibratron units with the same shape and size; and each vibratron unit is formed by a vanadium dioxide thin film on deposited on the surface of the medium substrate (2). The structural material adopts a medium material highly transparent to the terahertz waves as the substrate to achieve little and stable terahertz wave absorption loss, adopts the vanadium dioxide thin film which is a high-speed phase change material to manufacture the vibratron array, realizes the modulation of the terahertz waves by triggering the phase change of the vanadium dioxide thin film by thermal or laser modulation, and compared with a conventional metal vibratron array-based terahertz modulator, has greater modulation depth.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Method and device for control bias of laser modulator
ActiveCN101354515AShorten the timeHigh precisionElectromagnetic transmittersNon-linear opticsRadio frequencyElectric signal
The invention provides an offset control method and a device thereof. The method comprises the steps as follows: when the laser modulator is being started, linearly changed offset control voltages are input into the offset electrode of the laser modulator and the power of the output light of the laser modulator is obtained so as to determine the offset control voltage corresponding to the prearranged working point; subsequently, the communication electric signal of the radio frequency electrode of the laser modulator carries out the amplitude modulation of the communication electric signal by a low-frequency sine frequency guiding signal; simultaneously, determinate offset control voltage is input into the offset electrode; the output optical signal of the laser modulator is sampled and the sampled optical signal is compared with the frequency guiding signal; according to the comparison result, the offset control voltage of the offset electrode is adjusted. According to the technical proposal provided by the invention, the control stabilization time can be shortened and the control precision can be improved.
Owner:ZTE CORP
Multi-pulse star signal simulator
InactiveCN101644580AMeet the data requirements of the simulationHigh precisionInstruments for comonautical navigationCelestial navigationData reliability
The invention discloses a multi-pulse star signal simulator comprising a numerical value simulation unit, a first frequency integration unit, a laser modulation unit, a laser emission unit, a detectorunit, a second frequency integration unit and a photon counting logical unit, wherein the numerical value simulation unit generates radiation signal data of a plurality of pulse stars by using a clock of the first frequency integration unit according to a signal numerical value model and sends the radiation signal data to the laser modulation unit; the laser modulation unit generates a current signal which can directly modulate a laser according to the clock of the first frequency integration unit; the laser emission unit converts the current signal of a laser modulator into a laser intensitysignal; the detector unit receives the laser signal, generates pulses and sends the pulses into the photon counting logical unit; and the photon counting logical unit counts the pulses according to aclock of the second frequency integration unit and sends a counting result to an upper computer. The invention has the advantages of high data reliability and coincidence of a signal generation and detection mechanism with the actual condition and is used for providing simulated data to the independent celestial navigation simulation of a spacecraft.
Owner:XIDIAN UNIV
LIDAR Device Based on Scanning Mirrors Array and Multi-Frequency Laser Modulation
ActiveUS20180329037A1Maximize rangeReduce background noiseElectromagnetic wave reradiationRadio wave reradiation/reflectionAmbiguityOptoelectronics
A LiDAR device that transmits a single or multiple continuous or intermittent laser beams to the environment and detects the reflected light on one or more detectors. The LiDAR device may include a scanning mirrors array composed of a single or multiple moving mirrors capable of changing the direction of the transmitted light. The scanning mirrors array may also include sensors and actuators which can be used to precisely control or measure the position of the mirrors. The LiDAR device may also include a lens that focuses the light captured by the mirror(s) onto a single or a multitude of detectors. The device may include laser sources and detectors operating in various wavelengths. The LiDAR device may also include laser power modulation mechanisms at a single or multitude of frequencies to improve signal detection performance and remove any ambiguity in range calculation.
Owner:MASSACHUSETTS INST OF TECH
DMD-based dual-mode optical super-resolution microscopic imaging device and method
ActiveCN107167929AAdd new usesLow costFluorescence/phosphorescenceOptical elementsMicroscopic imageLight spot
The invention discloses a DMD-based dual-mode optical super-resolution microscopic imaging device and method. The device comprises multiple lasers of different wavelengths, a laser modulation module and a microscope optical imaging system. The laser modulation module comprises a DMD pattern generation module and a mask plate. The DMD pattern generation module is matched with the mask plate to gate different diffraction light spots so that the objective of realizing two types of super-resolution microscopic technology imaging of SIM and SMLM by sharing the same optical path can be achieved. The DMD has the response speed and the stability higher than those of a mechanical shutter and can be used for wavelength separation so that the cost is lower and use is easier in comparison with the acousto-optic tunable filter, the optical path system is enabled to be more compact and the cost of the system can be greatly reduced. Implementation of different imaging modes depends on multiplexing of the DMD. Using the DMD is put forward for the first time, and two technologies of SIM and SMLM are realized in the same optical path so that advantage complementation of the two super-resolution imaging technology of SIM and SMLM is facilitated, and the device and the method can be used for the research of multiple cell biological problems.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Method for generating vortex light beam by use of calculation hologram
InactiveCN103984103AGenerate flexibleThe production is controllableComplex mathematical operationsOptical elementsSource planeComplex amplitude
The invention discloses a method for generating a vortex light beam by use of a calculation hologram. The steps comprise: (1), utilizing a monocyclic Laguerre-Gaussian (LG) vortex light beam in a source plane (z=0m) coordinate system; (2), performing conjugate symmetrical extension on the complex amplitude of the vortex light beam, and obtaining symmetrical vortex light beam complex amplitude distribution; (3), performing Fourier transformation on the conjugate symmetrical vortex light beam complex amplitude distribution to obtain two-dimensional discrete real function distribution, performing DC component inhibition on real functions, and coding to form the vortex light beam calculation hologram; (4), performing Fourier inverse transformation on the calculation hologram, obtaining the light intensity distribution and the phase distribution of the vortex light beam, and taking the left half portions of the light intensity distribution and the phase distribution as the vortex light beam for digital reconstruction; and (5), loading the vortex light beam calculation hologram on a spatial light modulator, modulating incident laser and reconstructing the vortex light beam in a photoelectric mode. The method employs a conjugate symmetrical extension Fourier calculation holographic algorithm, the algorithm is rapid and simple, the calculation efficiency is high, and sidelobe-free high-quality vortex light beams can be generated.
Owner:SHANGHAI UNIV
Cavity enhanced absorption spectroscopy with a laser modulation side-band frequency locked to the cavity
A cavity enhanced absorption spectrometer (CEAS) and method for controlling the same. The CEAS includes a coherent electro-magnetic radiation source, an electro-magnetic modulator that creates a sideband with an adjustable frequency that is offset from the radiation source frequency by imparting an adjustable frequency modulation to the radiation. The CEAS also includes a RF source that drives the electro-magnetic modulator and a cavity enhanced absorption resonator (CEAR) that receives the sideband. A detector measures the proximity of the frequency of the sideband relative to the resonant frequency of the CEAR and generates a proximity detector signal, which is converted by a controller to a control signal that controls at least one of the RF source and the resonant frequency of the CEAR such that the frequency of the sideband and the resonant frequency of the CEAR are adjusted to maintain a predetermined proximity therebetween.
Owner:ENTANGLEMENT TECH
Rotating table type femtosecond laser direct writing method and device
The invention discloses a rotating table type femtosecond laser direct writing device. The rotating table type femtosecond laser direct writing device comprises a femtosecond laser source, a laser path, an X-Y axis two-dimension translation table, a rotating table and a controller, wherein the laser path is provided with a laser modulator, a two-dimension laser scanning galvanometer and a microobjective, after being modulated by the laser modulator, laser beams from the femtosecond laser source pass through the two-dimension laser scanning galvanometer to be projected onto a machined workpiece through the microobjective; the rotating table is arranged on the X-Y axis two-dimension translation table, a rotating shaft of the rotating table is aligned with a direct writing light axis, the table face of the rotating table is perpendicular to the direct writing light axis, and the machined workpiece is fixed onto the table face of the rotating table, and the controller is constructed into a form capable of controlling the laser beams incoming onto the machined workpiece through the laser path and the operation of the X-Y axis two-dimension translation table and the rotating table.
Owner:JILIN UNIV
Terrain surveillance system
A system for the surveillance of terrain and the detection of intrusions over a plane extending into that terrain. A curtain array of light beams is projected along the plane and reflections from the terrain are detected by a sensor array essentially spatially coincident with the array of light sources. The times of flight of the beams are determined, and these characterize the form of the terrain being surveilled. The initial background reflection pattern is acquired and stored by the system. A sudden change in this detected background pattern can be defined as arising from an unexpected reflection, indicative of an intrusion. Signal processing systems are described utilizing modulated laser beams and detection at a frequency at least twice that of the modulation, such that reflected signals arising from the ON and the OFF periods of the laser modulation can be subtracted to eliminate the background signals.
Owner:SHILAT OPTRONICS
Speckle reduction for laser projection displays
ActiveUS20120140784A1Reduce speckle noiseLaser detailsColor television detailsDisplay deviceOptoelectronics
Owner:MAXIM INTEGRATED PROD INC
Continuous laser frequency modulation range measurement device and method based on resampled signal splicing method
ActiveCN104007442AImprove measurement resolutionHigh measurement accuracyElectromagnetic wave reradiationMeasurement deviceLaser light
Owner:TIANJIN UNIV
Laser light detector with reflection rejection algorithm
ActiveUS7838808B1Improved signal-to-noise ratioPeak AccurateAngle measurementBeam/ray focussing/reflecting arrangementsLaser transmitterSignal-to-noise ratio (imaging)
A modulated laser light detector that converts laser light energy into electrical signals which exhibit a frequency that is substantially the same as the laser light modulation frequency, in which these signals allow the detector unit to determine a position where the laser light is impacting upon a photodiode array. A superheterodyne receiver circuit is used to provide high gain at an improved signal-to-noise ratio to improve the range at which the modulated laser light signal can be reliably detected. Various types of signal detection circuits are available. Various processing algorithms are disclosed, including one which rejects laser light strikes that are due to reflections, rather than due to a direct strike from the laser transmitter.
Owner:TRIMBLE NAVIGATION LTD
High-precision laser range-finding device
InactiveCN101029934AShort measurement timeHigh measurement accuracyElectromagnetic wave reradiationMicrocontrollerLaser transmitter
A high-accuracy distance measurement device of laser consists of microcontroller, storage expansion module, communication interface module, power supply module, laser modulation-driving module, laser emitter, driving module of laser start-up signal, laser-receiving power supply module, laser receiving module, filtering amplifier, high-accuracy time interval measurer and output module.
Owner:上海派恩科技有限公司
Laser modulator digital automatic bias voltage control device
InactiveCN101026417ASmall phase delayThere are no discrete effectsLaser detailsElectromagnetic transmissionControl communicationsPeak value
The control device is applied to laser modulator installed on light laser. The control device includes following parts: an output port for adjusted peak signal, and the outputted peak signal is coupled to laser modulator after driven and modulated by the modulator; a output port of a DC bias voltage, and the outputted DC bias voltage is coupled to laser modulator; an input port for PD electrical signal output from the laser modulator; a control module in use for controlling operations of drive of modulator and the DC bias voltage, and making consistent between function curves of photovoltaic conversion in laser modulator. Comparing with prior art, the invention solves issues of large influence on filter caused by discretion of parts, large variety of phase delay when temperature changes, unable to lock peak point of PD electrical signal, and not good controllable adjustability caused by not controllable jumping position of bias control voltage, and no control communication port.
Owner:HUAWEI TECH CO LTD
Multi-channel single photon counting measuring system based on digital lock phase de-multiplex
InactiveCN101832815AIncrease flexibilityHigh sensitivityDiagnostic recording/measuringSensorsElectrical impulseOptical measurements
The invention belongs to the field of optical measurement, relating to a multi-channel single photon counting measuring system based on digital lock phase de-multiplex. The system comprises a light source part, a measuring part, a digital-to-analogue conversion circuit, a digital circuit, a communication circuit and a computer, wherein the digital circuit outputs a digital sine to obtain a simulative sine wave through the digital-to-analogue conversion circuit, a laser modulator modulates the amplitude of a laser and couples a plurality of beams of modulated lasers with different frequencies into one beam to form into a light source of frequency division multiplexing, the light source irradiates an object to be measured, an emitted weak diffused light is captured by a single photon counting measurer, and an electric pulse is outputted through a circuit; and the digital lock phase arithmetic which is tightly combined with the single photon counting is realized by the digital circuit, and a mixed signal from different light resources is extracted in a separating way in a passageway of the measurer according to a preset parameter when receiving the electric pulse to obtain the intensity information of an emergent light which corresponds to each light source. The system shortens the measuring time, reduces the complexity thereof, improves the flexibility of the circuit, and reduces the measuring error.
Owner:TIANJIN UNIV
Fiber communication systems and methods
ActiveUS9912409B2Polarisation multiplex systemsWavelength-division multiplex systemsInjection lockedFiber
An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.
Owner:CABLE TELEVISION LAB
Photonic crystal structure for mode conversion
InactiveUS7242837B2Short transitionReduce lossNanoopticsCoupling light guidesPhotonic crystal structureCrystal structure
A photonic crystal guided propagation structure. The structure includes a guide portion Wn, n being a positive real number or zero number, having a first configuration of rows of patterns, and a guide portion Wm, m being a real number, m>n, having a second configuration of rows of patterns, and a transition zone of distance D located between guide portion Wn and guide portion Wm, in which patterns aligned with at least one row of patterns in the first configuration decrease in size over distance D to allow progressive passing from the first configuration of rows of patterns to the second configuration of rows of patterns. The structures can be applied to the area of integrated optics (semiconductor lasers, laser modulators, filters, multiplexors, etc.).
Owner:CENT NAT DE LA RECHERCHE SCI
Dispersion Compensating Varactor Circuit
InactiveUS20090245309A1Large amplitude RF driving voltageLinearized delay time compensationLaser detailsElectromagnetic transmissionFixed capacitorLow-pass filter
Improved dispersion compensating circuits for optical transmission systems are disclosed. According to the improved method, there is provided a compensation circuit comprising a varactor diode network. The network is preferably inserted between a source of laser modulating signal and the laser. A low-pass filter or all pass filter constructs the network. The network preferably includes an inductor or inductors and a combined circuit, which includes varactors. The network preferably provides an amplitude dependent delay of the modulating signal applied to the laser or to the optical receiver as post dispersion correction circuitry. In a first embodiment, a fixed capacitor is in series with a varactor and connected to a DC bias through inductor. Additional embodiments, using multiple varactors in different circuit configurations, with particular advantages for various applications identified.
Owner:GOOGLE TECH HLDG LLC
Integrated raster image processor and electro-photographic engine controller
ActiveUS7173719B2Quality improvementCostDigitally marking record carriersDigital computer detailsGratingClosed loop feedback
This invention comprises a converged printer architecture for controlling both electro-photographic (EP) processing and raster image processing (RIP) of data for laser modulation over a video line. By converging EP process control with image processing control, significant advantages in cost, image quality, and output stability are achieved. A digital signal processor (DSP) serves as the central processing resource of the architecture. The DSP is well suited for the dual role of image processing and real-time feedback process control. The DSP can operate in open loop motor / motion control, print process control, and in closed loop feedback control including image processing adaptations for quality and stability enhancements.
Owner:GENERAL ELECTRIC CO +1
Phase-sensitive optical time-domain reflectometer based on linear frequency-modulation pulse and measurement method of phase-sensitive optical time-domain reflectometer
PendingCN106643832AImprove linearityHigh measurement accuracyConverting sensor output opticallyRayleigh scatteringGrating
The invention relates to a phase-sensitive optical time-domain reflectometer based on a linear frequency-modulation pulse and a measurement method of the phase-sensitive optical time-domain reflectometer. The phase-sensitive optical time-domain reflectometer comprises a laser device, a single side band modulator SSBM, an acoustic optical modulator AOM, an erbium-doped optical fiber amplifier EDFAI, an EDFAII, an arbitrary waveform generator AWG, an optical fiber circulator, a fiber Bragg grating filter FBG, a photoelectric detector, a data collection module and a to-be-measured optical fiber, wherein laser enters the single side band modulator SSBM and is modulated into pulsed light by virtue of the acoustic optical modulator AOM, and the pulsed light is amplified by virtue of the erbium-doped optical fiber amplifier EDFAI and enters the to-be-measured optical fiber through the optical fiber circulator; and a backward Rayleigh scattering signal is output through the optical fiber circulator, a backward Rayleigh scattering optical signal is amplified by virtue of the erbium-doped optical fiber amplifier EDFAII and is detected and converted into an electric signal through the fiber Bragg grating filter FBG, and the data collection module executes data collection and data analysis. By the utilizing linear frequency-modulation pulse, the measurement time is shortened, and the dynamic performance of a system is improved; and the scheme provided by the invention is convenient and feasible, and the structure of the system is relatively simple.
Owner:ANSHAN REALPHOTONICS TECH CO LTD
Associated imaging device and method based on distributed semiconductor laser array
InactiveCN108363069AImprove output power utilizationReduce difficultyElectromagnetic wave reradiationLaser arrayLight beam
The invention provides an associated imaging device and method based on a distributed semiconductor laser array. The devices comprises a laser modulation module which controls switching states of different units of the laser array module according to a preset frequency within a preset time period, and determines the emission power of each laser unit according to preset light intensity information;a laser array module which emits a laser beam; a lens module which shapes and collimates the laser beam; an echo reception module which collects a light beam reflected via a target; a detection module which obtains the intensity of an echo optical signal; an association module which obtains a sub-image of a target object; and an image reconstruction module which obtains an image of the target obtain according to all sub-images of the target object within the preset time period. The distributed semiconductor laser array as a light source is combined with the detection module, the intensity ofthe illumination light field is increased, echo optical signals can be collected with less difficulty, the detection range is longer, the vertical cavity-surface emission laser array serves as the laser units, and the utilization rate of laser power is high.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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