988 results about "Laser technology" patented technology

The invention relates to the technical field of laser SLAM, and particularly discloses a laser SLAM method based on ground segmentation, and the method comprises the steps: obtaining laser radar point cloud data information, carrying out the point cloud preprocessing of the laser radar point cloud data, and obtaining ground point cloud features and non-ground point cloud features; respectively carrying out feature extraction, feature matching and pose estimation on the ground point cloud features and the non-ground point cloud features to obtain a pose nonlinear optimization constraint result; selecting a key frame according to a pose nonlinear optimization constraint result, constructing a local map according to pose information of the key frame, and obtaining a local map construction result; loopback detection is carried out according to the local map construction result, and a loopback detection constraint result is obtained; and performing global pose optimization processing according to a loopback detection constraint result and a local map construction result to obtain a global pose and global map construction result. The laser SLAM method based on ground segmentation provided by the invention can improve the positioning precision and the operation stability.

The invention relates to the technical field of laser, in particular to a dual-wavelength narrow-linewidth laser output device and method.The dual-wavelength narrow-linewidth laser output device comprises a semiconductor laser unit emitting linearly polarized light beams, and a light beam conversion lens is used for achieving conversion of semiconductor laser fast-axis light beams and semiconductor laser slow-axis light beams; the light beam conversion lens is used for collimating and compressing a semiconductor laser fast axis divergence angle, and the slow axis collimating lens is used for collimating and compressing a semiconductor laser slow axis divergence angle; the linearly polarized light beam is divided into a first light beam and a second light beam through the rectangular prism; the first light beam sequentially passes through a first volume Bragg grating, a first reflector, a half-wave plate and a polarization beam combiner; the second light beam sequentially passes through a second volume Bragg grating, a second reflector and a polarization beam combiner; the dual-wavelength narrow-linewidth semiconductor laser can solve the problems of precise regulation and control and power amplification of the central wavelength of the dual-wavelength narrow-linewidth semiconductor laser, has power expansibility, and realizes improvement of laser power by stacking a plurality of laser units in the vertical direction.

The invention provides a quasi-continuous thulium-doped fiber laser capable of synchronously suppressing relaxation oscillation and self-pulse, relates to the technical field of fiber laser, and is used for simultaneously realizing suppression of a self-pulse effect and a relaxation oscillation peak. Comprising a continuous driving module, a pulse driving module, a semiconductor laser pumping source, a high-reflectivity fiber bragg grating, a low-reflectivity fiber bragg grating, a beam combiner, a thulium-doped gain fiber, a passive fiber, a cladding pumping stripper and a laser output port, the continuous pump light and the pulse pump light are respectively driven by the continuous driving module and the pulse driving module to output continuous pump light and pulse pump light; the high-reflectivity fiber bragg grating and the low-reflectivity fiber bragg grating form a resonant cavity structure, the thulium-doped gain fiber serves as a gain medium of the thulium-doped fiber laser and absorbs pump light to generate population inversion, laser oscillation is formed by combining the resonant cavity of the laser, relaxation oscillation suppression is achieved, and meanwhile longitudinal mode distribution of the laser is effectively disrupted.

The invention belongs to the technical field of laser, and discloses a grating multiplexing spectrum synthesis system, which comprises a beamlet dense array, a diffraction grating and a turn-back mirror, each beamlet emitted by the beamlet dense array is diffracted by the diffraction grating and then is emitted in the form of convergent light, and the light is reflected twice by the turn-back mirror to form a light beam; each laser sub-beam is incident on the diffraction grating again along the opposite direction parallel to the original light, the sub-beams converge into one point on the diffraction grating by adjusting the distance between the turn-back mirror and the diffraction grating, and at the moment, the incident angle of each sub-beam is equal to the diffraction angle diffracted from the diffraction grating for the first time; and the diffraction angles of the sub-beams subjected to the second diffraction on the diffraction grating are equal and equal to the incident angle of the sub-beams subjected to the first diffraction, that is, the synthesized light beam is emitted along the direction parallel to and opposite to the direction of the light beam emitted from the sub-beam dense array. The invention provides a spectrum synthesis system which is simple in structure, easy in engineering implementation and compact in volume.

The invention provides an ultrasonic probe normal automatic attitude adjustment method and system based on laser ranging for a curved surface component, and relates to the technical field of laser, and the method comprises the steps: scanning the curved surface component through a laser ranging sensor array, obtaining surface space coordinate point data, fitting a curved surface geometric equation, and dividing a detection area. And selecting a detection center point in each detection area, calculating a normal vector of the curved surface, converting the normal vector to a local coordinate system of the probe, constructing a pose transformation matrix, and calculating an attitude angle parameter of the ultrasonic probe. And finally, converting the attitude angle parameter into a motion control instruction of a robot end effector, driving a three-axis servo motor assembly to adjust the attitude of the ultrasonic probe, and performing real-time attitude correction through an angle encoder to ensure that the ultrasonic probe is always perpendicular to the surface of the curved surface component. According to the invention, normal automatic posture adjustment of the ultrasonic probe in curved surface component detection is realized, and the detection precision and efficiency are improved.

The invention provides a distributed feedback laser with a double-layer grating structure, and relates to the technical field of lasers, the laser forms an InGaAlAs multi-quantum well active region, an upper sampling grating layer and a lower phase shift grating layer on an n-type InP substrate in sequence, the upper grating layer is designed based on a reconstruction equivalent chirp technology, and the lower phase shift grating layer is designed based on a reconstruction equivalent chirp technology. Two sections of asymmetric modulation areas with sampling periods linearly gradually changing in opposite directions are arranged in the axial direction of the resonant cavity, and the lower grating layer is a quarter-wave phase shift grating matched with the period of the upper seed grating. Through the synergistic effect of equivalent phase modulation and phase shift generated by the double-layer grating, the photon density distribution in the cavity can be improved, the longitudinal space hole burning effect can be weakened, the sensitivity to end face phase fluctuation can be reduced, high single-mode power and large modulation bandwidth can be realized in a wide temperature range, and the double-layer grating is suitable for a high-speed optical communication and coarse wavelength division multiplexing transmission system.

The invention provides an atmospheric pollutant traceability analysis method and system. According to the method, a form classification standard is established through particle shape features, and atmospheric particles are divided into naturally raised dust and industrial emission particle swarms. A dual-wavelength laser technology is adopted for natural flying dust, specifically, the first wavelength is matched with the inherent frequency of mineral crystals, amorphous scattering interference is blocked through polarization beam splitting, and a reflection signal sequence is extracted to generate a mineral migration path; and the second wavelength screens heavy metal scattering signals of the industrial particles, and a heavy metal diffusion track is constructed by utilizing spatial intensity gradient. And superposing the two paths and aerosol three-dimensional distribution data to generate a thermal distribution diagram, and when the space density exceeds a threshold value, calculating a migration path deviation value and a trajectory offset, dynamically distributing pollution source contribution weights, and outputting a pollution source analysis result. According to the invention, dynamic and accurate analysis of natural and industrial pollution sources is realized, and the regional pollution traceability and management and control strategy targeting are improved.

The invention discloses a high-light element damage monitoring method and system, a storage medium and a computer program product, and relates to the technical field of high-energy laser, and the method comprises the steps: starting a laser device to irradiate a to-be-monitored high-light element, the element temperature, the light spot power and the light spot image of the highlight element to be monitored in the irradiation process are acquired through a data acquisition module; generating a light spot analysis diagram, a temperature space distribution diagram and a temperature power time distribution diagram according to the element temperature, the light spot power and the light spot image; and performing damage monitoring on the highlight element to be monitored based on the light spot analysis diagram, the temperature space distribution diagram and the temperature power time distribution diagram. According to the invention, the state of the strong light element under laser irradiation is comprehensively reflected from different angles by simultaneously collecting multiple parameters, and misjudgment or missed judgment possibly caused by single parameter monitoring is avoided, so that the comprehensiveness and accuracy of monitoring are improved.

The invention relates to the technical field of laser, and provides a laser system with a controllable pulse state and a control method thereof. The control method of the laser system with the controllable pulse state comprises the steps that under the conditions that the cavity length of an FP cavity is in an initial fit state and the air pressure in the FP cavity is standard air pressure, a pump light source is controlled to adjust the pump power according to a first set; in response to the fact that the target pulse interval is smaller than the initial pulse interval, the pump light source is controlled to keep the target power unchanged, the air pressure of the FP cavity is adjusted to be within the preset range, and the cavity length of the FP cavity is adjusted through a second set; determining a target cavity length; controlling the laser to be output in a first pulse state; and controlling the laser to output in a second pulse state. According to the control method, the controllably generated abnormal wave form with the high peak power is introduced according to the preset frame structure to serve as a physical layer disturbance or random segment, and the reliability and safety of system signal transmission are improved under the condition that data segment transmission is not affected.

The invention relates to the field of agricultural irrigation, in particular to an intelligent water distribution system and method for root space-time competition of an intercropping system, and is applied to agricultural precise irrigation, efficient utilization of water resources and management of the intercropping system. According to the system, the ground penetrating radar and the multispectral laser technology are fused, and crop root system distribution, activity and nutrient data are accurately obtained. Based on transfer learning and multi-agent reinforcement learning algorithms, a root system competition model is constructed, and an optimal water distribution strategy is intelligently decided. The deformable drip irrigation execution module achieves precise irrigation, the water consumption is greatly reduced by 20%-35%, and waste is effectively avoided. Meanwhile, the system balances the growth requirements of intercropping crops, relieves root competition, improves the overall yield and stability, and the amplification reaches 15%-25%. According to the system, the utilization efficiency of water resources is remarkably improved, and powerful support is provided for sustainable development of modern agriculture.

The invention relates to the field of PCB (printed circuit board) printing, in particular to a high-precision multi-layer lamination and alignment PCB printing process which comprises a substrate pretreatment stage, a substrate preassembly stage, a dynamic lamination stage and a finished product output stage, the dynamic lamination stage comprises preheating treatment and resonance impurity removal treatment, and the lamination stage is divided into multi-stage lamination. And air bubbles and resin between the laminated bodies are optimized in the second pressing stage. According to the method, the inner-layer core plate and the copper foil are pretreated, so that positioning of the multi-layer core plate is more accurate and detection is facilitated, meanwhile, nanoscale micropores are formed in the copper foil through a laser technology to improve the flowing property of subsequent resin, and in the pressing process, pre-pressing and multi-stage pressing are set to improve the pressing accuracy; and in the second-stage pressing process, the dispersion direction of internal bubbles and the flowing direction of resin are improved through an ultrasonic device, a radiation heating device, a magnetic field assisting device and the like, the alignment accuracy and the pressing precision of the plate are further improved, and the machining efficiency is guaranteed.

The invention discloses a welding seam quality detection system and method based on a laser technology, and the system comprises a laser collection module which is used for emitting a laser beam to a to-be-detected target welding seam, and collecting a beam signal reflected by the target welding seam; the light path transmission module is used for receiving and transmitting the light beam signal; wherein the light path transmission module comprises a light path adjusting unit and a photoelectric receiving unit, the light path adjusting unit is used for adjusting the propagation path of the light beam signal so that the light beam signal can be propagated to the photoelectric receiving unit, and the photoelectric receiving unit is used for converting the light beam signal into an electric signal; and the signal processing module is used for receiving the electric signal and detecting the quality of the welding seam according to the electric signal. Welding seam detection is achieved through the laser technology, and the welding seam quality detection effect can be improved.

The utility model provides an underwater three-dimensional reconstruction image acquisition device with binocular camera fused with line laser, comprising a binocular cabin and an aviation plug, the binocular cabin is internally provided with a camera and a laser emitter, and the aviation plug is used for realizing electrical connection between an external power supply and rear-end imaging processing equipment and between the camera and the laser emitter; the two camera cabin bodies are arranged on the two sides of the middle cabin body, the laser transmitter is arranged in the middle cabin body, and the cameras are arranged in the camera cabin bodies, so that a binocular camera and a line laser technology are integrated on one set of equipment, the binocular camera is fused with line laser to realize an underwater image shooting function, and high-precision and high-stability underwater three-dimensional reconstruction is realized; therefore, the requirements of the fields of ocean engineering, ocean science and the like for underwater three-dimensional data acquisition are met, and the problem that the effect and the application range of underwater three-dimensional reconstruction are limited due to the fact that existing underwater camera equipment cannot achieve the functions of a binocular camera and a line laser at the same time is solved.

The invention relates to the technical field of all-solid-state laser, and provides a thermal stress self-matching laser device and a regulation and control method thereof. The resonant cavity oscillates the pumping laser, and an input lens and an output lens are oppositely arranged in the resonant cavity; the gain medium is arranged between the input lens and the output lens; the stress self-adaptive heat sink is used for dissipating heat and can monitor and adjust a real-time stress value borne by the gain medium; the power meter is arranged at the downstream of the output lens along the light path and is used for measuring the power of the output laser; a stress threshold value is preset in the processor; and the processor is used for controlling the stress adaptive heat sink to adjust the real-time stress value based on the power and the stress threshold value, so that the power meets a preset requirement. According to the invention, the stress of the gain medium in the operation process of the laser is monitored, regulated and controlled, and the stress matching of the gain medium is realized, so that the thermally induced stress damage risk of the gain medium is reduced.

The utility model relates to the technical field of lasers, and discloses a high-slope-efficiency surface grating surface emitting laser which comprises a substrate, a lower waveguide layer, an active layer and an upper waveguide layer from bottom to top along the cross section. A ridge-shaped waveguide is formed in the middle area of the uppermost layer of the upper waveguide layer, and a Bragg grating is etched on the surface of the ridge-shaped waveguide; the Bragg grating comprises a section of second-order grating located in the middle and two sections of first-order gratings located at the two ends; a lambda / 4 phase shift is arranged in the second-order grating; the lambda / 4 phase shift is located in an etching area or a non-etching area of the first-order grating closest to the second-order grating; when the lambda / 4 phase shift is located in the etching region of the first-order grating closest to the second-order grating, the upward diffraction light power of the second-order grating is maximum, and the downward diffraction light power is minimum; when the lambda / 4 phase shift is located in the non-etching area of the first-order grating closest to the second-order grating, the upward diffraction light power of the second-order grating is minimum, and the downward diffraction light power of the second-order grating is maximum. According to the invention, high-slope efficiency lasing can be realized.

The invention belongs to the technical field of laser, and discloses a laser beam splitting and combining device based on an acousto-optic deflector pair and application thereof, and the laser beam splitting and combining device comprises a transmitting optical fiber module, a first acousto-optic deflector, a diaphragm, a second acousto-optic deflector and a receiving optical fiber module which are sequentially arranged; the first acousto-optic deflector and the second acousto-optic deflector are arranged in parallel; the transmitting optical fiber module is used for transmitting laser to the first acousto-optic deflector; the first acousto-optic deflector and the second acousto-optic deflector are used for deflecting, splitting or combining laser beams; the diaphragm is used for blocking secondary diffracted light except the primary diffracted light; and the receiving optical fiber module is used for receiving the laser emitted from the second acousto-optic deflector. Therefore, the technical problems that in the prior art, the laser beam splitting function and the laser beam combining function are mutually independent, two kinds of operation cannot be considered in the same device, and real-time regulation and control over the light beam operation mode are lacked are solved.

The invention discloses a device for cutting daily glass through laser. The device comprises a laser assembly, a clamping jaw assembly and a product supporting assembly. The product supporting assembly is used for supporting daily glass, the clamping jaw assembly is located over the product supporting assembly and clamps the daily glass on the product supporting assembly, the laser assembly is located on one side of the clamping jaw assembly, the laser assembly points to the daily glass, and the daily glass is cut through laser. According to the invention, on the aspect of technical principle, an advanced laser technology and a high-precision control system are fused, the limitation of a traditional cracking method is broken through, and fine processing of the cracking of the glassware is realized by accurately regulating and controlling laser energy and pulse parameters.

This application relates to the field of laser technology and provides an integrated fiber coupling device and apparatus. The device includes a beam combining module and a coupling filter module integrated within a housing. The beam combining module polarizes and combines the laser beam, which is then coupled into a fiber combiner via a first fiber and output as a second fiber. The output is then filtered by a cladding filter unit and output through a nozzle. The coupling filter module contains multiple fixed cavities with curved walls. The first fiber at the input end of the fiber combiner and the second fiber at the output end are respectively fixed in curvature by adhering to the corresponding curved walls before output. This device improves beam quality and overall heat dissipation efficiency. The curved wall structure fixes the curvature of the fiber, reducing fiber stress and bending radius, thus solving the problems of excessive bending stress and insecure fiber fixation in existing coupling units, which lead to poor stability and reliability of laser output.

The invention discloses a large-scale rotary equipment blade three-dimensional profile measurement and point cloud splicing method and system based on line laser, and belongs to the technical field of precision measurement and computer image processing. Reading a CAD model of a to-be-measured blade, extracting geometric features of the blade by a system, and analyzing the geometric features to generate a plurality of measurement path candidate sets; a measured blade is fixed on a rotary table, a multi-dimensional measurement movement mechanism is adopted to carry a line laser sensor to scan the surface of the blade step by step according to a planned final path, and accurate three-dimensional point cloud data is obtained; the method comprises the following steps: after acquiring point cloud data of a blade, initially aligning the scanned point cloud data in combination with position information of equipment; the optimized ICP algorithm is used, a transformation matrix between the point clouds is continuously adjusted through an iteration mode, the distance between the point clouds is minimized, mismatching and noise influences are further reduced, and therefore accurate registration is achieved. The invention aims to solve the problems of low precision and poor efficiency of aero-engine blade three-dimensional profile measurement.

The invention relates to the technical field of laser processing, and discloses a method and system for online removal of steel wire rod oxide scale based on the laser technology, and the method comprises the following steps: establishing a relationship between a release stress and an adhesive force, and determining a relationship between different process parameters and oxide scale removal effects; initial laser process parameters are determined by combining the current material attributes of the wire rod and the performance of the oxide skin; the initial laser process parameters are dynamically adjusted according to the thickness distribution condition of the oxidation layer on the surface of the wire rod; performing laser treatment on the oxide scale on the surface of the wire rod by using a rotary laser head; and detecting the removal effect of the scale on the surface of the wire rod by using an image recognition technology, and dynamically optimizing model parameters according to a detection result. The device can remove scale and stains on the surface of the wire rod in the continuous production process at a time, and the problems that in the prior art, the scale on the surface of the wire rod cannot be completely removed, and the scale on the surface of a workpiece cannot be efficiently treated online are solved.

The invention provides a laser crystal heterogeneous bonding method and an optical element, and relates to the technical field of laser, and the method comprises the steps: carrying out the ultra-precise surface treatment of the to-be-bonded surfaces of a laser crystal and a heterogeneous material based on the laser crystal and the heterogeneous material; respectively depositing at least one transition layer on the two to-be-bonded surfaces after surface treatment through a physical or chemical deposition method; the outermost layers of the two transition layers are made of the same material; carrying out ion beam activation treatment on the two surfaces to be bonded on which the transition layers are deposited so as to form high-activity surfaces; and aligning the two activated surfaces to be bonded in a vacuum environment at room temperature and applying pressure, and realizing room-temperature bonding through electrostatic force and chemical bond action to obtain a bonding body of the laser crystal and the heterogeneous material. According to the invention, thermal-mechanical property and chemical property differences among heterogeneous materials are overcome, and high-strength, low-stress and high-optical-quality bonding is realized.

The invention relates to a high-power light source in the technical field of laser, in particular to a high-power light source for assisting an EYDFA to output a 1.5-micron wave band based on 1-micron wave band signal light, which absorbs untransferred pump light by introducing the signal light in the 1-micron wave band, further inhibits spontaneous radiation amplification of 1-micron wave band ytterbium ions, and improves the output efficiency of the 1-micron wave band ytterbium ions. The wavelength of the selected 1-micron-band signal light is located at the reabsorption wavelength of the EYDFA at the same time, the 1-micron-band signal light absorbing redundant pump light is reabsorbed by the EYDFA, energy is further transferred to erbium ions, and the conversion efficiency and output power of 1.5-micron-band laser are improved.

The invention relates to the technical field of semiconductor lasers, in particular to a multi-wavelength semiconductor laser. Comprising a semiconductor PN junction, and an inclined array waveguide region, a beam splitting MMI structure, a gain array waveguide, a beam combining MMI structure and a super-symmetric waveguide array which are sequentially arranged on the surface of the semiconductor PN junction in the longitudinal mode light beam transmission direction; the inclined array waveguide region comprises Bragg reflection gratings and inclined array waveguides, the Bragg reflection gratings are arranged on ridge surfaces of inlet ends of the inclined array waveguides, cavity lengths of waveguides in the inclined array waveguides are different, and the Bragg reflection gratings are parallel; seed sources output by the inclined array waveguide region are injected into the beam splitting MMI structure, and the seed sources are uniformly distributed and coupled into each waveguide of the gain array waveguide; the gain array waveguide is a parallel waveguide; the super-symmetric waveguide array is used for providing further gain to a fundamental mode and loss to a high-order mode. The antenna has the advantages of simple preparation, high gain, high single-mode performance, small size and high integration.

The invention provides a high-power wide-spectrum long-wave infrared femtosecond laser generation method, and relates to the technical field of infrared ultrafast laser. According to the method, the 1.5 [mu] m pumping BGSe crystal is adopted, compared with a traditional 1 [mu] m pumping BGSe crystal, the heat accumulation effect is greatly reduced, and the operation stability of the system is remarkably improved in combination with a water-cooling heat dissipation device. Through crystal cutting angle optimization and phase matching design, 10-16 [mu] m wide-spectrum long-wave infrared femtosecond laser output is achieved, the power reaches 100 mW, and the application requirements in the fields of molecular spectrum recognition, environment monitoring and the like are met.

The invention relates to a high-power dual-wavelength erbium-doped solid laser, and belongs to the technical field of laser. The high-power dual-wavelength erbium-doped solid laser comprises a pumping source, a pumping cavity, a diamond, a heat sink, a first resonant cavity and a second resonant cavity, the first resonant cavity comprises a first erbium-doped YAG slice crystal, and the second resonant cavity comprises a second erbium-doped YAG slice crystal. The first erbium-doped YAG sheet crystal is used for generating 1.64 [mu] m laser which oscillates back and forth in a back-and-forth light path provided by the first resonant cavity; and the second erbium-doped YAG sheet crystal is used for generating 2.94 [mu] m laser which oscillates back and forth in a back-and-forth light path provided by the second resonant cavity. According to the high-power dual-wavelength erbium-doped solid laser provided by the invention, synchronous output of 1.64 mu m and 2.94 mu m dual-wavelength laser is realized, the multifunctionality and medical adaptability of the laser are enhanced, and multi-type treatment requirements of soft tissues and hard tissues can be met at the same time.

The invention provides a gas flow field pressure measuring method and device based on a laser spectrum, which can be applied to the technical field of laser and the technical field of pressure measurement. The method for measuring the flow field pressure based on the laser spectrum comprises the following steps: emitting first laser to a to-be-measured gas flow field by using a laser, so as to induce the to-be-measured gas flow field to emit a filament signal through interaction between the to-be-measured gas flow field and the first laser; performing extraction processing on the light filament signal by using a signal detector to obtain target light intensity information corresponding to the to-be-detected gas flow field; according to a preset light intensity pressure calibration curve, performing inversion analysis on the target light intensity information corresponding to the to-be-measured gas flow field to obtain the target pressure of the to-be-measured flow field, the light intensity pressure calibration curve is established according to different gas pressures and spectral signals obtained after gas flow fields under different gas pressures are induced by laser.

The utility model belongs to the technical field of laser, and particularly provides a laser power box which comprises a box body with a double-layer structure. The first layer of the box body is provided with an electric control system and a power supply, and the second layer of the box body is provided with an air cooling radiator, an optical fiber seed source and a pre-amplification system for pre-processing light beams provided by the optical fiber seed source; the mounting area of the power supply and the pre-discharging system is communicated with an air duct of the air-cooled radiator; and the electric control system is respectively connected with the power supply, the optical fiber seed source, the pre-amplification system and the air cooling radiator. The box body of a double-layer structure is used, the power supply and the pre-placing system are placed around the air cooling radiator in a staggered mode, wind energy blown out by the air cooling radiator can cool the internal space of the power box at the same time, and the heat dissipation efficiency of the structure in the power box is improved. The split type femtosecond laser capable of efficiently dissipating heat is provided on the basis, by optimizing the layout of internal optical components, the laser head cannot be interfered by vibration of the air cooling radiator in the working process, and the stability and reliability of laser output performance are guaranteed.

A space-based microwave and laser fused ocean subsurface layer temperature field reconstruction method solves the technical problems that current ocean subsurface layer temperature profile acquisition lacks direct participation of subsurface layer parameters and the reconstruction precision is low, and the ocean subsurface layer temperature field reconstruction method comprises the following steps: step 1, determining an error of laser radar inversion ocean subsurface layer temperature; 2, generating an input data set and an output data set; 3, constructing a sub-surface layer temperature profile reconstruction model, and performing training; and step 4, performing efficiency evaluation on the trained model. According to the method, the temperature field reconstruction precision is remarkably improved, and the traditional technical limitation depending on a pure sea surface parameter model is broken through.

The invention relates to the technical field of laser, in particular to a high-signal-to-noise-ratio modulation transfer spectrum frequency stabilization light path system. The system comprises a laser, an optical isolator, a first half-wave plate, a first polarization splitting prism, an optical fiber coupler, a second half-wave plate, a second polarization splitting prism, a first reflecting mirror, an electro-optical modulator, a second reflecting mirror and a third polarization splitting prism, wherein the first half-wave plate is used for adjusting the power of frequency stabilization light; the second half-wave plate is used for adjusting the power ratio of pump light to probe light; a first quarter-wave plate, a second quarter-wave plate, an atomic gas chamber and a photoelectric detector; after the output of the laser is isolated by the optical isolator, the first half-wave plate and the first polarization splitting prism are matched to adjust the frequency stabilization total beam power to about 5mW; the pump light is modulated by the electro-optical modulator, the probe light and the pump light reversely interact in the atomic gas chamber in an anti-phase circular polarization state, and the signal-to-noise ratio of a modulation transfer signal and the stability of a frequency stabilization system are remarkably improved.

The invention belongs to the technical field of laser, and particularly discloses a beam shaping system and method based on prism pair orthogonality and cascade, and the system comprises a single-mode fiber, an aspherical lens, a first prism pair, a first parallel plate, a second prism pair and a second parallel plate which are sequentially arranged along the direction of an optical axis. A Gaussian beam emitted by a single-mode optical fiber is collimated by an aspherical lens to form a parallel beam, the beam is expanded or compressed in the X direction by a first prism pair, the beam is expanded in the Y direction by a second prism pair, and two inclined parallel plates are respectively used for compensating the beam offset in the X / Y direction; according to the invention, the circular Gaussian beam emitted by the single-mode fiber can be shaped, a large strip-shaped collimation light spot with an adjustable length-width ratio from 4: 1 to 20: 1 and a long axis size of 30mm can be realized, and the central positions of the input and output beams in the cross section are ensured to be unchanged.