609 results about "Laser array" patented technology

The invention discloses a laser spot array detection method and system for structured light parameter calibration, and the method comprises the steps: capturing a laser array spot image on a laser calibration plane through a structured light camera, and carrying out the distortion correction processing and image filtering; extracting a red channel image, performing full-image adaptive threshold segmentation, corrosion and expansion operations, and screening Gaussian centroid coordinates and corresponding channels of candidate regions according to region areas; calculating the position of a peak value according to the position relation and the energy distribution condition of the candidate points, positioning the position of the light spot array, and generating a theoretical light spot array; calculating an actual light spot position by utilizing projective transformation and complementing missing light spots, carrying out secondary positioning correction on a light spot array by utilizing a seed point segmentation algorithm, and iteratively carrying out projective transformation to correct light spot deviation to obtain a sub-pixel-level light spot position; according to the invention, light spot sub-pixel position detection in structured light parameter calibration is realized, the difficulty of structured light camera pipeline calibration is reduced, and the reliability and robustness are improved.

The invention discloses a vehicle detection and identification method and system based on laser sensing, and relates to the field of vehicle detection.The method comprises the steps that firstly, obstacle reflection signals are obtained through a multi-band laser array, preliminary classification is conducted through wavelength, time difference and intensity difference, and point cloud features are constructed; a lightweight network is adopted to filter noise points, and point cloud holes and shielding areas are intelligently complemented; then, performing hierarchical voxelization processing according to the obstacle distance, performing coarse-grained downsampling on a long-distance target, and keeping details on a short-distance target fine-grained; and finally, through a double-stage verification mechanism of a lightweight PointPill network and a three-dimensional convolutional network, precise grading detection and target reliability rechecking of far and near targets are realized, real-time performance and accuracy are considered, the problems of poor adaptability, low precision and insufficient dynamic scene adaptability of an existing laser radar detection technology are solved, and the method has the advantages of high detection precision and high reliability. According to the invention, high-precision and high-real-time vehicle detection and identification can be realized.

The invention relates to the technical field of unmanned aerial vehicles, and discloses an unmanned aerial vehicle automatic capture system based on artificial intelligence, and the system comprises a dynamic environment sensing module and a capture decision module. The multi-modal spatial data of the target unmanned aerial vehicle are collected in real time, and the multi-modal spatial data comprise three-dimensional coordinates (fusing data of a multispectral radar and a laser array sensor), flight attitudes and electromagnetic characteristic data; after dynamic interference suppression is carried out on the data, processing is carried out through a decision processing layer (including a data cleaning module and a collaborative modeling module); the data cleaning module completes track segmentation, noise filtering and standardized calibration; the collaborative modeling module is trained through multi-scene historical data, an electromagnetic interference analysis layer of the collaborative modeling module generates electromagnetic coupling characteristic data, a trajectory correction layer models trajectory association and generates compensation trajectory field data, and a decision execution layer fuses the data and outputs a dynamic interception instruction. According to the system, through multi-modal fusion and dynamic modeling, the accuracy and adaptability of unmanned aerial vehicle capturing in a complex environment are improved.

According to the multi-beam confocal mask defect detection system and method based on the fiber laser array, a multi-point scanning light field is obtained on the basis of the fiber laser array to serve as an illumination light source, the scanning light field can be regulated and controlled on the basis of arrangement of the laser array, and through the combined action of a motion table and a multi-face rotating mirror, the defect of the multi-beam confocal mask is detected. Rapid and accurate mask two-dimensional scanning imaging is achieved, and high-resolution detection of mask defects is achieved on the basis of a confocal microscopic imaging method in cooperation with a high-power microscope objective and a photomultiplier. Compared with a traditional point scanning type mask defect detection system, the system has the advantages that the detection resolution is high, the scanning speed is high, a multi-point scanning light field can be freely regulated and controlled, and no extra diffraction optical element needs to be introduced.

The invention provides a laser array type soil surface displacement field identification method, which comprises the following steps of: determining a plurality of observation points according to a laser array and a target on the soil surface, establishing a coordinate system by taking a soil body mark point without load as an original point, and recording the original coordinates of each observation point; after the soil body displaces, the laser array records coordinates of the observation points after displacement according to a scanning period; extracting coordinates of a plurality of observation points after soil displacement according to the target displacement field of the soil surface and the spatial change surface data; and interpolating and outputting the plurality of coordinates into a surface by using an interpolation method. According to the invention, high-precision and non-contact scanning is carried out on the land surface by utilizing laser displacement sensor equipment through a laser array type soil surface displacement field identification technology, and the displacement condition of the land surface can be monitored in real time through processing and analyzing scanned data, so that potential geological disaster risk points can be identified. Therefore, the purpose of continuously monitoring the soil surface displacement in real time is achieved.

The invention discloses an engineering surveying and mapping road surface flatness detection device and method, and the device comprises a measurement vehicle which is internally provided with a vehicle-mounted industrial control computer. A laser array module is fixedly mounted at the front end of a chassis of the measuring vehicle, a multi-axis inertia compensation unit is mounted at the gravity center of the chassis of the measuring vehicle, a vibration vision fusion sensor group is mounted on the measuring vehicle, and a space-time alignment center module is integrated in the vehicle-mounted industrial personal computer; a multi-modal fusion processing module is also integrated in the on-board industrial personal computer; the on-board industrial personal computer is provided with a block chain evidence storage interface, and the block chain evidence storage interface communicates with the cloud server through the on-board 5G module; and the block chain evidence storage interface generates a unique hash value for each detection road section. The invention relates to the technical field of engineering surveying and mapping. According to the invention, the problems of low efficiency, limited precision, insufficient data processing and analysis capability and lack of a long-term data management and tracing mechanism in the traditional road surface flatness detection technology are solved.

The invention belongs to the technical field of gas detection, and particularly relates to a multi-component gas detection device and a detection method.The multi-component gas detection device is characterized in that according to components of detected gas, a laser driver drives a laser array to emit light with different modulation frequencies and multiple wavelengths, the light is changed into parallel light after passing through an optical fiber array and a micro-lens array, and the parallel light is transmitted to a gas detector; after gas to be detected is absorbed and reflected by a diffuse reflection surface, reflected light passes through a lens and a dichroscope to be converged, light with long wavelength and light with short wavelength respectively enter photoelectric detectors with corresponding wave bands, the photoelectric detectors convert optical signals into electric signals and filter the electric signals, and the filtered signals to be detected are transmitted into a digital lock-in amplifier to be processed in parallel. And demodulating second harmonics and first harmonics of different gases, and calculating the concentration of each to-be-detected gas through a calculation unit. According to the invention, simultaneous detection of multi-component gas concentration can be realized.

The invention belongs to the technical field of cable manufacturing. According to the self-adaptive correction method and system based on cable insulation layer thickness monitoring, the real-time center offset of a cable is determined according to laser array measurement data after time-space synchronization; determining the thickness of the cable according to the X-ray thickness measurement data after time-space synchronization; determining the long-short axis ratio of the ellipse according to the shot cable ellipse contour image after the time-space synchronization; inputting the real-time center offset of the cable, the thickness of the cable and the long-short axis ratio of the ellipse into an extended Kalman filter to obtain fusion thickness, fusion concentricity and fusion ellipticity, and further determining an extrusion die pose compensation vector and a screw rotation speed correction amount; according to the extrusion die pose compensation vector, a corresponding execution mechanism is driven to adjust the extrusion die pose, and according to the screw rotation speed correction, the screw rotation speed is controlled; according to the invention, the problems of measurement one-sidedness, control hysteresis and deviation accumulation are solved, and the continuous and stable control of the geometric parameters of the cable insulation layer is realized.

The embodiment of the invention provides a laser imaging scanning control method and system and related equipment, which are used for realizing dynamic adjustment of theoretical scanning intervals of all laser light sources in a laser array and prolonging the overall service life of the laser array. The method provided by the embodiment of the invention comprises the following steps: setting a theoretical scanning interval of each laser light source in a scanning direction, and confirming a first row position Li of each interval, i being a mark number of the laser light source; calculating the deviation value Ki of each laser light source in the scanning direction, wherein Ki = Di-Li; wherein Di is the mounting position of each laser light source in the scanning direction; determining the maximum value Kmax in the Ki, and reversely moving the laser array Kmax to a correction position in the vertical scanning direction; the pixel rows are scanned in sequence from the correction position, and when the current position of each laser light source is located in the corresponding theoretical scanning interval, the corresponding laser light source starts scanning of the current pixel row.

The invention relates to the technical field of semiconductor lasers, and particularly provides an addressable semiconductor laser array, which comprises M # imgabs0 # N laser units, a plurality of anodes and a plurality of cathodes, the M # imgabs1 # N laser units are arranged in an array mode according to M # imgabs2 # N. For each anode in the multiple anodes, the laser units located in different rows and columns can be connected in series through the anodes to form inclined columns, the multiple anodes are connected in series to form multiple mutually-spaced inclined columns, and for each cathode in the multiple cathodes, the laser units in the same column are connected in series through the cathodes to form multiple mutually-spaced inclined columns. And all the cathodes are connected in parallel. According to the addressable semiconductor laser array, the lasers located in different rows and different columns are connected in series through the anodes, each laser unit can be controlled to emit light independently, any specific adjacent three laser units can emit light at the same time, then the addressable semiconductor laser array can emit light in various modes, and the application range of the addressable semiconductor laser array is widened.

The embodiment of the invention provides a laser direct-writing imaging control method, a laser direct-writing imaging control system and related equipment, which are used for improving the precision and the consistency of laser direct-writing imaging. The method provided by the embodiment of the invention comprises the following steps: calculating a difference value Di between a theoretical position and a fitting coordinate of each laser light source, wherein i is a laser light source number; calculating a small-cycle scanning line number L = (Di (max)-Di (min)) / P + 1; after the laser array is reversely moved for Di (max) in the direction perpendicular to the scanning direction, the laser array is controlled to conduct small-period scanning; in each small-cycle scanning process, L times of scanning are sequentially carried out, in each scanning process, only the laser light source with the current position located at the theoretical exposure position is started and scans the corresponding pixel row, and after each time of scanning is completed, one pixel interval is moved in the vertical direction of scanning; and after each small-period scanning, moving S1 relative to the initial position of the previous small period in the vertical direction of the scanning direction, and then continuing the next small-period scanning until C times of small-period scanning are completed.

The invention provides a plum blossom moving contact multi-parameter fusion sensor and a sensor information feedback analysis method, and relates to the technical field of circuit breaker connection and assembly, the plum blossom moving contact multi-parameter fusion sensor comprises a shell, a pressure detection sensor, a laser array detection sensor and a temperature detection sensor; the housing sleeves a plum blossom moving contact of the handcart circuit breaker, and the pressure detection sensor is installed in the housing and can detect a clamping force detection value of the plum blossom moving contact of the handcart circuit breaker to a static contact. The laser array detection sensor is arranged in the shell and is used for detecting an insertion depth detection value of a plum blossom moving contact of the handcart circuit breaker inserted into a static contact; and the temperature detection sensor is arranged in the shell and is used for detecting a temperature detection value on the plum blossom moving contact. According to the application, the connection state between the plum blossom moving contact and the static contact of the handcart circuit breaker is monitored in real time through the plurality of sensors, so that the problems of low electrical connection strength, shallow insertion depth and overhigh temperature of the plum blossom moving contact of the plum blossom moving contact and the static contact can be monitored in time.

Integrated laser arrays, photonic devices, packages, and systems are disclosed. An example integrated laser array includes first and second lasers, each laser including a light-emitter structure and a waveguide with a grating. In one aspect, effective pitches of the gratings of the first and second lasers are different by less than about 5 angstroms, while the gratings of the first and second lasers are fabricated with a resolution of at least 1 nanometer. In another aspect, each laser includes a waveguide with left and right sidewall gratings, effective widths of the waveguides of the first and second lasers are different, and an offset between the left and right sidewall gratings of the second laser is different from an offset between the left and right sidewall gratings of the first laser. Integrated laser arrays described herein may be particularly suitable for being implemented in dense wavelength division multiplexed systems.

The invention discloses an intelligent baby crib monitoring system based on wireless transmission, and relates to the technical field of baby physiological monitoring, which comprises the following steps: dynamically distributing node communication time slots through wireless networking, adjusting the inclination angle of a laser array, activating a dual-band metamaterial antenna, synchronously collecting light intensity fluctuation signals and electrocardiosignals, and generating a mixed signal flow; carrying out physiological feature extraction on the mixed signal by adopting adaptive filtering and noise conjoint analysis, and generating a clean breathing waveform and an electrocardio waveform through wavelet decomposition and dynamic threshold suppression; respiration and heart rate abnormity is identified based on zero cross point detection and R wave energy verification, and a transmission priority is determined in combination with chaotic key generation and a Markov decision model. Through multi-band collaborative networking and dynamic time slot allocation, hardware-level synchronous acquisition of light intensity fluctuation signals and electrocardiosignals is realized, and signal synchronization errors are controlled in combination with metamaterial antenna dual-channel noise capture and differential common-mode rejection.

The invention discloses an induction detection system for production and manufacturing based on artificial intelligence and a regulation and control method, and belongs to the field of artificial intelligence. Comprising an edge data acquisition module, a depth image recognition module, a dynamic sensor integrated array, an artificial intelligence analysis module, an intelligent abnormity feedback module and a linkage execution control module. The edge data acquisition module is deployed at key nodes of a production line, models pressure, current, temperature, vibration and other signals, and performs cross sampling with the sensor array. The depth image recognition module adopts a structured light laser array and a multi-phase shift interference technology to extract a morphology gradient map in real time. And the artificial intelligence analysis module fuses the multi-scale convolutional network and the time sequence reasoning unit, and performs high-dimensional alignment and modeling on the double-source data to form a multi-resolution sensing field. And the intelligent abnormity feedback module generates a response grade score, and realizes millisecond-level control mapping with the linkage control module based on a state path. The method has the beneficial effect that the accuracy and response speed of abnormal recognition in the manufacturing process are improved.

The embodiment of the invention provides a laser array and a laser radar, and relates to the technical field of optical perception. The differential resistance of the laser array is adjustable, and the optical power of the output emitted laser is adjustable. The laser array comprises a first laser and a second laser; the first laser comprises a first reflecting layer, a first active layer and a second reflecting layer which are sequentially arranged along the epitaxial direction, and a first oxidation hole is formed in the second reflecting layer; the second laser comprises a third reflecting layer, a second active layer and a fourth reflecting layer which are sequentially arranged in the epitaxial direction, a second oxidation hole is formed in the fourth reflecting layer, and a light blocking layer is further arranged on the side, away from the second active layer, of the fourth reflecting layer. The projection of the light blocking layer on the second active layer is overlapped with the projection of the second oxidation hole on the second active layer; the first laser is electrically connected with the second laser.

The invention discloses a high-power semiconductor laser array which is formed by sequentially and alternately placing and welding n semiconductor laser chips and n + 1 tungsten copper heat sinks, the width of each tungsten copper heat sink is larger than that of each semiconductor laser chip, and the upper surface and the lower surface of each semiconductor laser chip are wrapped by the tungsten copper heat sinks to form a sandwich structure. The emergent end face of the semiconductor laser chip extends out of the edge of the tungsten copper heat sink by 10-20 microns. The invention also discloses a packaging method. The current injection density of the laser module at the laser emitting end is low, so that the optical power density of the emitting end is reduced, the reliability of a device is improved, and the service life of the device is prolonged.

The invention relates to a distributed optical fiber sensing event identification method and device based on optical calculation, and relates to the technical field of optical fiber sensing event identification. Two-dimensional time-frequency signals of distributed sensing information are collected through a coherent detection type phi-OTDR system, and accurate recognition of sensing events is achieved on an optical path through optical calculation. The optical calculation comprises an optical convolution operation and an optical full connection operation, a two-dimensional time-frequency signal is processed into a one-dimensional tensor, and the neural network weight is loaded to the light through the cooperation of a light intensity amplitude modulator and a programmable multi-wavelength laser array, so that the optical neural network calculation is completed, and finally the corresponding light intensity of four wavelengths is obtained. Accurate identification of sensing events is realized. Sensing signals are processed through optical calculation, dependence on electronic calculation resources is avoided, and the response speed and the anti-interference capacity of a sensing system are improved; meanwhile, through distributed processing, the fault tolerance and reliability of the system are enhanced.

The invention provides a laser semiconductor array spectrum matching optimization method and system fused with an AI large model, and relates to the technical field of semiconductor laser array spectrum optimization. The method comprises the following steps: firstly, obtaining personalized medical beauty function requirements of a user, determining spectrum requirement information, and obtaining working parameter information according to a preset laser semiconductor array matching strategy library; acquiring output spectrum information in real time by utilizing spectrum detection equipment; determining parameter adjustment information through a spectrum matching optimization model constructed by deep learning in combination with spectrum requirements and output spectrum information; and finally adjusting the working parameters of the laser semiconductor array according to the parameter adjustment information. By implementing the method, the matching precision of the output spectrum of the laser semiconductor array and the personalized demand of the user can be improved.

The invention relates to the technical field of optical parameter measurement, in particular to an optical fiber nonlinear refractive index measurement method and system based on a narrow linewidth signal, and the method comprises the steps: obtaining the initial length of an optical fiber and the wavelength parameter and a plurality of power values of a laser group connected with a to-be-measured optical fiber, and calculating the effective length value of the optical fiber based on the initial length; main peak power and side peak power corresponding to the multiple power values are obtained, the power ratio of the main peak power and the side peak power is calculated, the power ratio is input into a calculation model for inversion calculation to obtain the corresponding target phase shift amount, and the power values and the corresponding phase shift amount are fitted to determine intermediate parameters; and calculating the nonlinear refractive index of the optical fiber by combining the intermediate parameter, the wavelength parameter and the effective length value. The technical problems that in the prior art, the calculation process is complex and is easily interfered by the dispersion effect, and the nonlinear effect intensity is unstable, so that the accuracy of the nonlinear refractive index of the optical fiber is low are solved. The method has the effects of reducing the calculation complexity of the nonlinear refractive index of the optical fiber and improving the accuracy at the same time.

A solid-state LIDAR transmitter includes a laser array comprising first and second laser pixels that each generate first and second sub-aperture beams. A first microlens focuses first and second sub-aperture beams generated by the first laser pixel and focuses first and second sub-aperture beams generated by the second laser pixel. A second microlens directs the first and second sub-aperture beams generated by the first pixel such that they overlap at a plane. A lens projects the first sub-aperture beam generated by the first laser pixel and the first sub-aperture beam generated by the second laser pixel with a different angle in the far field in order to achieve a desired spatial resolution of the LIDAR system.

The invention relates to the field of optical calculation and optical signals, in particular to a hybrid photon neural network device and a classification method. Comprising a multi-channel tunable light source, a modulator array, an FPGA and a 4 * 4 MZI array. A DFB-SA array and a PD array; the output end of the multi-channel tunable light source is connected with the input end of the modulator array, the FPGA is connected with the radio frequency end of the modulator array, the output end of the modulator array is connected with the input end of the 4 * 4 MZI array, the output end of the 4 * 4 MZI array is connected with the input end of the DFB-SA array, and the output end of the DFB-SA array is connected with the input end of the PD array. According to the invention, the phase parameters of the 4 * 4 MZI array can be configured through an efficient gradient descent algorithm, so that the device has advantages in the aspect of flexible simulation of neural network synapses; in addition, the device adopts a distributed feedback semiconductor laser array with a saturated absorption region, and the nonlinear activation function of photon neurons is realized by fully utilizing the threshold characteristic of the distributed feedback semiconductor laser array.

The invention discloses an intelligent belt crack and tear detection system based on machine vision and laser coupling, and relates to the technical field of belt conveying. The intelligent belt crack and tear detection system based on machine vision and laser coupling comprises a visual detection module, an image processing flow module, a laser-assisted detection module and a data processing and control module, and the visual detection module comprises double-view-angle linear array cameras (a camera 1 and a camera 2), an area array monitoring camera and an intelligent light source system; the image processing flow module comprises multi-modal feature fusion, dynamic threshold segmentation, morphological filtering and deep learning classification; the laser-assisted detection module comprises a laser array sensor; the data processing and control module comprises an edge computing unit, an upper computer system, an integrated expert system, early warning and linkage control, system automation and intelligentization, operation and maintenance cost reduction, unmanned detection, full-process automatic operation, manual inspection frequency reduction and manpower cost saving by more than 50%.

The embodiment of the invention provides a laser direct-writing image detection method, a laser direct-writing image detection system and related equipment, which realize accurate positioning of an image deformation area position on a complete exposure breadth and measurement of deformation quantity by detecting the offset of light spots of different lasers in the horizontal direction at the same moment. The method comprises the following steps: arranging a plurality of groups of non-repeated binary images to be ranked in the horizontal direction to form an image sequence, and carrying out binarization processing on the image sequence to obtain the position of a laser exposure point; in a synchronous scanning process of a plurality of lasers in the laser array, controlling each laser to expose a mapping position of an exposure point on a photosensitive coating in an image sequence by using a synchronous switch instruction so as to respectively form a latent image of the image sequence in a respective scanning area of each laser; and if the plurality of developing image sequences are not aligned in the horizontal direction from the target binary images in the same sequence, detecting coordinate values of difference points of the target binary images in each developing image sequence in the horizontal direction.

The invention relates to the technical field of laser, in particular to an on-chip series edge-emitting semiconductor laser array and a process method. The on-chip series edge-emitting semiconductor laser array sequentially comprises a semi-insulating substrate, a non-doped buffer layer, a P-type heavily doped layer, a P-type tunnel junction layer, an N-type tunnel junction layer, an N-type cladding, an N-type waveguide layer, an active region, a P-type waveguide layer, a P-type cladding and a P-type cover layer from bottom to top. Table surfaces on the two sides of each light-emitting unit are deeply etched to the P-type heavily doped layer, and a lateral current diffusion suppression groove is formed between the bottoms of any two adjacent light-emitting units. An on-chip series edge-emitting semiconductor laser array structure is adopted, the parasitic effect is reduced through coplanar electrode design, upper and lower electrodes can be prepared through a single process to reduce the cost, lateral current diffusion suppression grooves are formed between light-emitting units to reduce crosstalk, the light-emitting units are connected in series to work under the same injection current, and the light-emitting efficiency is improved. The requirements of a driving circuit can be effectively reduced, and light-emitting uniformity is improved.

This application relates to a monolithically integrated multi-wavelength topological cavity surface-emitting laser (PCSEL) array. According to one embodiment, a monolithically integrated PCSEL array includes multiple PCSELs formed from the same semiconductor layer, at least one layer of which is formed as a photonic crystal layer, or the laser also includes a separate photonic crystal layer. The photonic crystal layer includes multiple supercell structures, each with substructures having multiple independent one-dimensional parameters. At least two independent one-dimensional parameters of one or more substructures are modulated to be greater than or less than their equilibrium position to open the Dirac point of the supercell's bandgap at the equilibrium position. Around any point in the photonic crystal layer, the modulation of the two independent one-dimensional parameters of the supercell forms a vortex structure, which corresponds in parameter space to one or more turns around the equilibrium position. The supercell lattice constants of the two lasers can be different to emit lasers of different wavelengths.

The invention discloses a high-reliability semiconductor laser array packaging structure preparation clamp and a packaging structure preparation method using the same. The clamp is used for installing a product module of a packaging structure and comprises a base, a cylindrical pin, a horizontal moving block, a wedge-shaped block and a vertical moving block, a sunken horizontal groove is formed in the center of the base, and a sunken inclined groove is formed in one end of the horizontal groove; the inner side face, away from the horizontal groove, of the inclined groove and the side face, away from the wedge-shaped block, of the inclined groove are rough inclined faces, the product module, the cylindrical pin and the horizontal moving block are arranged in the horizontal groove side by side, and the wedge-shaped block is arranged in the inclined groove. According to the high-reliability semiconductor laser array packaging structure preparation clamp, it can be guaranteed that welding seams between the bars and the conductive heat dissipation spacer blocks are not extruded in the welding flux melting process, so that welding flux extrusion is avoided, and the problems of missing welding and excessive welding flux extrusion caused by the influence of the height difference of the bottoms of the conductive heat dissipation spacer blocks are solved; and meanwhile, the problem of secondary melting of the welding flux is avoided.

The invention discloses a light field regulation and control system and method based on laser array coherent combination. A laser array generation module is used for outputting a high-power array light beam; a spatial beam-shrinking light path in the light field regulation and control module samples an array light beam and carries out beam-shrinking processing, so that the light field area of the array light beam after beam-shrinking can be matched with the effective target surface size of spatial light modulators, and the two spatial light modulators respectively regulate and control the phase and polarization of two cross-polarization components of the array light beam after beam-shrinking. The regulated light beam is transmitted to a phase and polarization locking loop; and the phase and polarization locking loop generates a phase control signal and a polarization control signal according to the regulated light beam output by the light field regulation module, and applies the phase control signal and the polarization control signal to a phase modulator and a polarization controller of each path of unit laser in the laser array generation module, so that phase and polarization locking of the high-power array light beam is realized. According to the invention, flexible light field regulation and control of far-field synthetic light spots of the array light beams can be realized.

The invention discloses a C-band tunable broadband light source system with a wavelength and power locking function. The C-band tunable broadband light source system comprises a tunable laser array chip, a main control module, a laser chip current driving module, a temperature control module, an optical splitter, a wavelength locking module and a power adjusting module, the temperature control module reads and adjusts the working temperature of the tunable laser array chip; the laser chip current driving module applies current excitation to each laser in the tunable laser array chip; emergent light of the tunable laser array chip is respectively transmitted to the wavelength locking module and the power adjusting module through the optical splitter; the wavelength locking module carries out wavelength locking on the emergent light based on two F-P etalon with the same response curve period and complementary response curve peak values; and the power regulation module adopts a PID algorithm to carry out power regulation and locking on the emergent light. According to the invention, any wavelength lasing can be realized in the C wave band, and the method has the advantages of rapidness, accuracy and the like in the aspect of wavelength and power deviation correction.

The invention relates to the technical field of rail transit, and provides a multifunctional rail detection system, which comprises a multi-source data acquisition unit, an optical fiber inertial navigation sensor, a laser array module, a dual-mode camera group, a radar speed measurement module and a temperature and humidity sensor, the data acquisition module is used for synchronously acquiring track geometric parameters, three-dimensional surface topography, inertial navigation data, real-time vehicle speed and environmental parameters; the dynamic processing unit is arranged in the compartment and comprises a data fusion controller, a self-adaptive Kalman filtering module, an anomaly diagnosis engine and an edge computing host, and the data fusion controller integrates multi-source data through a multi-thread parallel processing technology. On the basis of self-adaptive Kalman filtering and vehicle speed-parameter dynamic mapping, the track gauge detection error under the variable speed working condition is reduced to + / -0.3 mm from + / -3 mm, and the curvature radius calculation error lt is obtained; and the predictive maintenance model prolongs the overhaul period of the track by 40%, and reduces the operation and maintenance cost by 35%.