319 results about "Cw laser" patented technology

The invention discloses an array type optical fiber ultrasonic imaging system based on multi-path delay parallel detection, and belongs to the technical field of ultrasonic detection and imaging. The main working process of the system is as follows: continuous laser output by a laser is modulated into pulse laser to be transmitted to an optical fiber ultrasonic detector array, and ultrasonic waves emitted by an ultrasonic wave generating device act on each detection array element to cause the property change of a detection optical signal; through multi-path time delay with the optical fiber as the medium, the detection optical signal forms different transmission time in each channel, is distinguished in a time division mode and is combined into a single path to be output. After photoelectric conversion, electric signals containing multi-channel detection information are collected in parallel, the signals are analyzed at a terminal processor by means of an imaging algorithm with an array parallel architecture, information of a to-be-detected target is obtained, and image reconstruction is completed. The array type optical fiber ultrasonic imaging system has the advantages of being accurate and rapid in scanning detection, simple and compact in system structure and efficient and high-quality in image reconstruction, and large-scale and low-cost array type optical fiber ultrasonic imaging is achieved.

The invention discloses an underwater navigation positioning method and system based on supercontinuum laser intensity correlation. The system comprises a master control system, a transmitting end underwater base station and a receiving end underwater carrier. The method comprises the following steps: firstly, a main control system generates a super-continuum laser signal with pseudo-random code information, the super-continuum laser signal is separated into optical signals of different wavelength channels through a light splitting module, and the optical signals are respectively sent to underwater base stations uniquely corresponding to the wavelength channels and are emitted; then the underwater carrier receives optical signals from a plurality of base stations, identifies a signal source base station according to wavelength identification, performs correlation operation with a locally copied pseudo-random code sequence, determines signal arrival time TOA and calculates a pseudo-range; and finally, resolving the three-dimensional coordinate and local clock error result of the underwater carrier by combining the pseudo-ranges, absolute positions and transmission delays of the underwater carrier and the at least four base stations. According to the invention, high-precision and high-robustness absolute positioning of the underwater environment is realized, and the reliability of long-time positioning and navigation of the underwater robot is enhanced.

The invention discloses a method and device for optimizing metal powder laying additive manufacturing, the method comprises the steps that optical fiber beam combination is conducted on short pulse optical fiber laser and continuous optical fiber laser which are the same in wavelength to form a composite light source, and the pulse width of the short pulse optical fiber laser is the nanosecond level or the subnanosecond level; the composite light source is output to the galvanometer module through the beam combining optical fiber and then acts on the metal powder bed, and the low-cost and high-efficiency method of full coaxiality and concentricity of lasers of different light sources through the beam combining optical fiber is adopted, so that the printing stability, reliability and large-area uniformity are guaranteed; the short pulse laser and the continuous laser act on an irradiation metal area synchronously and coaxially all the time in the scanning process, metal powder bed melting manufacturing under the force oscillation effect is achieved, and the stability of a keyhole in the additive manufacturing process is improved. According to the method, the pore forming probability of laser powder laying sintering three-dimensional forming can be greatly reduced, the comprehensive mechanical property of a printed piece is improved, and wide popularization and application prospects are achieved.

The invention discloses a wire bonder transducer, a wire bonder and a vibration amplitude detection and calibration method, and realizes non-contact and high-sensitivity amplitude detection of a vibration part of the transducer by integrating a laser interference detection part in the wire bonder transducer. Continuous laser with a stable wavelength is output through the laser, signal light and reference light are split through the optical splitter, the signal light irradiates the vibration part of the transducer and is reflected, the reference light and the reflected light are combined in the beam combiner to form interference fringes, and finally a phase change signal is collected through the photoelectric detector. According to the invention, the micron-sized vibration displacement of the transducer in the working state can be extracted in real time with high precision. Compared with a traditional judgment mode, the method has the advantages that an objective and quantifiable detection means is provided, the precision and the automation degree of transducer performance consistency evaluation are effectively improved, the method can be widely applied to production line detection, equipment calibration, online quality control and other scenes of wire welding equipment, and the method has important significance in guaranteeing the welding stability and improving the packaging yield.

The invention relates to the technical field of liquid phase chips, in particular to an autoantibody spectrum detection platform based on a liquid phase chip technology, and the method comprises the following steps: preparation and functionalization of quantum dot encoding microspheres; the core-shell structure quantum dots are used as coding elements, and fluorescence coding combination of more than 1000 is realized by regulating and controlling the size, 3-10nm, Mn < 2 + > doping and spatial distribution of the quantum dots. The method has the advantages of super multi-target detection, super sensitivity, strong anti-interference capability and intelligent analysis, in the actual process, the core-shell structure quantum dots are adopted as coding elements, more than 1000 fluorescent coding combinations are realized by regulating and controlling the size, doping and spatial distribution of the quantum dots, high-density coding is realized by utilizing three-parameter coding and an orthogonal decoupling algorithm, and the method is suitable for large-scale industrial production. More types of autoantibodies can be detected at the same time, so that the detection flux is improved; the surfaces of the quantum dots are coated with silicon dioxide layers, and the fluorescence intensity is attenuated by lt under continuous laser irradiation; and the stability of a fluorescence signal in the detection process is ensured.

The invention discloses double-laser machining equipment and method for tool machining. The double-laser machining equipment comprises a tool clamping mechanism and a gantry mounting frame which are arranged on a workbench. The cutter clamping mechanism drives the cutter to rotate; the infrared continuous laser processing head and the purple picosecond laser processing head are respectively mounted on the gantry mounting frame through a lifting mechanism, an infrared continuous laser beam emitted by the infrared continuous laser acts on the cutter through the infrared continuous laser processing head, and a purple picosecond laser beam emitted by the purple picosecond laser acts on the cutter through the purple picosecond laser processing head; the cutter clamping mechanism, the lifting mechanism, the infrared continuous laser, the infrared continuous laser machining head, the purple picosecond laser and the purple picosecond laser machining head are all electrically connected with the controller. The infrared continuous laser and the purple picosecond laser are integrated in the same equipment, the cutter is modified through double-laser cooperation, dynamic adjustment of laser parameters is achieved in combination with the lifting mechanism and the controller, the heat influence is effectively reduced, and the machining quality stability is improved.

The invention belongs to the technical field of wind tunnel measurement, and discloses a method and system for visualization of a large-scale high-enthalpy wind tunnel flow field structure. The method comprises the following steps: generating sheet light of which the width is greater than or equal to 300mm by using continuous laser of which the wavelength is 811.5 nm, and irradiating a wind tunnel flow field to excite naturally existing metastable state argon atoms and generate a fluorescence signal; collecting the fluorescence signal through a narrow-band filter with the central wavelength of 910nm and the bandwidth of less than or equal to 5nm in a direction perpendicular to a sheet light plane; performing synchronous scanning and displacement measurement on the sheet light and the signal acquisition device to obtain three-dimensional flow field data; and based on the three-dimensional flow field data, reconstructing a hypersonic speed wind tunnel flow field structure with the total enthalpy being greater than or equal to 10MJ / kg and the wind tunnel caliber being greater than or equal to 500mm. According to the invention, the problem that the prior art cannot satisfy the visualization of the fine flow field of the large-scale high-enthalpy wind tunnel is effectively solved, the tracing-free and wide-range measurement capability suitable for the extreme environment and the high model near wall surface is realized, and a new powerful tool is provided for the hypersonic velocity research.

The quantum current transformer based on the optical fiber isolation microwave transmission comprises a high-voltage primary side which comprises a magnetic shielding ring and an NV color center magnetic sensing probe module, and a magnetic sensing probe is arranged in the magnetic shielding ring; at the low-voltage secondary side, the microwave system is used for generating radio-frequency signals in a preset frequency range and transmitting the radio-frequency signals to the NV color center magnetic-sensing probe module, the laser system is used for generating continuous laser and transmitting the continuous laser to the NV color center magnetic-sensing probe module, and the microwave system and the laser system are used in cooperation to drive the NV color center to generate fluorescence signals representing the magnetic field intensity. A fluorescence signal is transmitted to the data processing system to calculate to-be-detected current information; wherein the microwave system is connected with the NV color center magnetic sensing probe module through an optical fiber, the microwave system modulates the radio frequency signal into an optical signal, transmits the optical signal to the NV color center magnetic sensing probe module, and restores the optical signal into the radio frequency signal in the NV color center magnetic sensing probe module to be received. According to the transformer, stable transmission of microwave signals under the high-low voltage isolation condition is achieved, the design is reasonable and exquisite, and the measurement precision is high.

The invention discloses a welding method for titanium alloy thick plates, and relates to the technical field of laser welding, and the method comprises the following steps: placing a plurality of titanium alloy thick plates to be welded on a workbench, carrying out backing welding on backing welding areas of the titanium alloy thick plates to be welded, and carrying out continuous laser processing through picosecond pulse laser, reciprocating motion is conducted in the molten pool and the forging area; after the backing welding process is finished, a first laser wire filling welding area and a second laser wire filling welding area between different titanium alloy thick plates to be welded are welded in a laser wire filling welding mode, in the welding process, picosecond pulse laser follows continuous laser machining, and the welding process is completed. And reciprocating motion is conducted in the molten pool and the forging area according to a preset motion trail, so that different titanium alloy thick plates to be welded are welded. The technical effect that uneven distribution of the structure performance of the welding joint is avoided is achieved.

The invention relates to the technical field of spectral measurement, in particular to a quantum correlation enhanced optical comb spectrum device and method, and the method comprises the steps: processing pump light and seed light to obtain idler frequency light and intrinsic light with quantum correlation; performing time domain matching adjustment on the idle frequency light, and reflecting the idle frequency light after the time domain matching adjustment to obtain a time-matched quantum correlation light beam; combining the intrinsic light and a continuous laser to obtain a first combined light; the mid-infrared light comb generates mid-infrared light carrying gas information after penetrating through the sample cell containing the gas to be detected; the light after the first beam combination and the mid-infrared light carrying the gas information are combined to obtain light after the second beam combination, frequency conversion processing is carried out, and then a near-infrared light comb is output; and processing the quantum correlation light beam and the near-infrared light comb which are matched in time, and outputting a double-light comb signal. Through combination of a quantum correlation mechanism and a frequency conversion technology, the intermediate infrared spectrum detection signal-to-noise ratio is remarkably improved, and high-sensitivity and high-speed parallel quantum enhanced spectrum is realized.

The invention relates to the technical field of laser splitting, and provides a dual-laser synchronous coaxial modified stripping device which comprises a mobile platform, a first pulse laser system, a second pulse laser system and a pulse delay regulation and control system, the moving platform can move the to-be-stripped part along a plurality of different directions; the first pulse laser system emits ultrashort pulse laser to the to-be-stripped part through a first light path, so that an initial modified layer is formed in the to-be-stripped part; the second pulse laser system synchronously emits continuous laser to the to-be-stripped part through a second light path, so that the initial modified layer is heated to form a cracked complete modified layer; the pulse delay regulation and control system is arranged in the first light path and comprises a plurality of regulation and control parts which are arranged in the first light path at intervals in the same straight line direction; and the plurality of regulation and control parts are used for enabling the ultrashort pulse laser irradiated in the pulse delay regulation and control system to form at least two different optical path differences, and mutually interfere in the pulse delay regulation and control system to form pulse delay.

The invention discloses a wavelength division multiplexing phi-OTDR and BOTDR fusion demodulation method, system and device and a storage medium, and relates to the technical field of distributed optical fiber sensing, and the method comprises the steps: employing a double independent narrow linewidth laser to output continuous laser, enabling each path to be divided into two beams through a coupler, enabling one beam to be subjected to pulse modulation, and enabling the other beam to be used as local oscillation light; pulse light is modulated into frequency-shift pulse light through an acousto-optic modulator, and the frequency-shift pulse light is injected into a sensing optical fiber after being combined by an optical combiner. And the backscattered light is separated by the optical wave separator according to the wavelength. Rayleigh signals are subjected to coherent receiving and orthogonal demodulation to obtain light intensity; brillouin signal amplification, frequency mixing and the like are performed to extract frequency shift. In combination with light intensity and frequency shift, temperature strain is decoupled, and vibration information is demodulated; according to the invention, the measurement precision is improved, and the line potential risk can be found in time; efficient signal isolation and transmission and temperature strain decoupling measurement are achieved, and pipeline safety is guaranteed; the structure is simple and easy to expand, and long-distance, low-cost and high-precision monitoring and timely disaster early warning can be realized.

The invention discloses a method for cutting silicon nitride ceramic based on laser. The invention provides a method for cutting silicon nitride ceramic based on laser. The method comprises the steps that a silicon nitride ceramic mold to be cut is fixed to a workbench of a laser cutting device through a clamp; setting laser processing parameters; coating an absorbent on a pre-cutting area of the silicon nitride ceramic; according to the cutting path and the laser processing parameters, a laser of a laser cutting device is used for cutting the silicon nitride ceramic, and continuous laser is used for moving and cutting on the surface of the silicon nitride ceramic along the set path; and auxiliary gas coaxial with the light beam is used for blowing away molten substances, and a cooling effect is achieved, so that continuous kerfs are formed on the surface of the silicon nitride ceramic, the laser absorptivity of the ceramic can be increased, and the processing efficiency and quality of the silicon nitride ceramic are improved.

The application provides a method for rapidly improving the surface structure and roughness of a cast aluminum alloy part, and relates to the technical field of laser beam processing, and comprises the following steps: fixing the cast aluminum alloy part on a multi-axis movable object platform; using a continuous laser beam to scan the initial surface layer of the cast aluminum alloy part, and controlling the laser power and scanning speed to make adjacent molten pools continuously overlap to form a uniform molten layer; when the thickness of the uniform molten layer reaches a first preset thickness required for surface structure reconstruction, stopping the laser scanning; the uniform molten layer is self-cooled and solidified in a room temperature environment to form a solidified surface layer; wherein the solidified surface layer forms a submicron equiaxed crystal structure, and the roughness of the solidified surface layer is smaller than that of the initial surface layer. The method directly generates a submicron equiaxed crystal structure under the condition of room temperature self-solidification by accurately controlling the molten pool overlap and the cooling rate, and achieves the purpose of rapidly modifying the surface layer of the cast aluminum alloy part.

This invention relates to information technology. The purpose of this invention is to solve the problem of inaccurate measurement of time delay mismatch in current chaotic modular link systems. It provides a chaotic modular link delay testing system and method, the technical solution of which can be summarized as follows: A continuous laser is used as a test carrier, and this test carrier is split into two beams, one outputting to the chaotic modular link system under test; the other test carrier is mixed with the output of the chaotic decryption device of the chaotic modular link system under test at a 90° angle to achieve coherent detection with zero difference, obtaining a mixed optical field; the mixed optical field is then converted by photoelectric conversion to output a Q-component signal; the input Q-component signal is sampled at high speed, and a phase mismatch term is calculated; an autocorrelation operation is performed on the phase mismatch term to obtain a correlation curve; and the time delay corresponding to the second peak is calculated based on the correlation curve to obtain the measured time delay mismatch Δt. The beneficial effect of this invention is that it can quickly and accurately calculate the measured time delay mismatch Δt, and it is applicable to chaotic modular link systems.

The invention relates to a method and a device for regulating and controlling the structure performance of a nickel-based high-temperature alloy in pulse laser-assisted additive manufacturing, and belongs to the technical field of additive manufacturing. The method comprises the following steps: controlling the oxygen content in a sealed forming cabin of an LPBF forming device, and paving nickel-based high-temperature alloy powder on a substrate of the sealed forming cabin; and the pulse laser and the continuous laser are controlled to output laser beams, the pulse laser beams and the continuous laser beams are coupled in a polarization beam combination or wavelength beam combination mode, and after the focal length of the coupled laser beams is adjusted, the nickel-based superalloy powder on the substrate is subjected to fusion forming. According to the method, the pulse laser and the continuous laser are coupled into the coaxial light spots, in-situ synchronous disturbance on the molten pool in the LPBF additive manufacturing process is achieved, the solidification behavior of the nickel-based high-temperature alloy can be accurately regulated and controlled, epitaxial growth of columnar crystals is effectively broken, formation of fine isometric crystals is promoted, and the yield of the nickel-based high-temperature alloy is improved. And the anisotropy and cracking risk of the material can be reduced.

The application belongs to the field of heavy metal detection, and discloses a coal-fired heavy metal detection and analysis device and method based on LIBS-LAAS, which comprises a pulsed laser excitation unit, a wavelength-tunable continuous laser resonance absorption unit, a coaxial signal acquisition unit, a paraxial signal acquisition unit, a control and analysis unit and a displacement detection platform; the pulsed laser excitation unit comprises a pulsed laser, which emits pulsed laser and ablates a sample to generate plasma; the wavelength-tunable continuous laser resonance absorption unit comprises a wavelength-tunable continuous laser for emitting continuous laser to the plasma; the coaxial signal acquisition unit comprises a first spectrometer, which acquires LAAS absorption spectrum information of the continuous laser passing through the plasma. Through the application, the interference of the spectrum line overlap of the LIBS detection of heavy metal elements can be broken through, the spectrum information of multiple heavy metal elements in the coal sample can be acquired at the same time, the rapid detection and analysis of the heavy metal elements can be realized, and the accuracy of the heavy metal detection and analysis result is improved.

The invention provides a high-precision voltage-stabilizing constant-current power supply for continuous discharge of a CO2 laser, which relates to the technical field of high-voltage voltage-stabilizing constant-current power supplies and comprises a high-voltage direct-current voltage-stabilizing power supply and a high-impedance amplification loop. The high-voltage direct-current voltage-stabilized power supply is boosted by a transformer, rectified by a rectifier bridge and stabilized by a filter capacitor, and continuously adjustable high-voltage output of 0-30kV is provided; the high-impedance amplification loop is composed of an operational amplifier, a three-stage triode amplification circuit and an electronic tube, the output impedance reaches up to 650 megohms, and the high-impedance amplification loop has the excellent constant-current characteristic. The power supply can accurately adjust the output current in the range of 0-30mA, the current fluctuation is less than one thousandth, the power supply can continuously and stably operate for more than 18 hours, and the power supply is suitable for laser discharge control in a high-temperature and high-density plasma environment. According to the invention, high-precision output is realized by adopting common performance devices, the advantages of voltage resistance, overload resistance and cost are considered, and the problems of poor current stability and inconvenient adjustment of a traditional laser power supply are solved.

The invention discloses a free space optical communication system based on a structured optical frequency comb, and belongs to the field of optical communication. Comprising an optical frequency comb generation system, a signal coding system, a spatial light modulation and demodulation system and a signal receiving system. The optical frequency comb generation system is used for modulating input continuous laser into an adjustable optical frequency comb with high repetition frequency, short pulse width and high power; the signal coding system is used for separating the light with different wavelengths in the optical frequency comb, independently coding the light with each wavelength, and finally combining the light with different wavelengths again; the spatial light modulation and demodulation system is used for coupling the Gaussian beam in the optical fiber into a free space and converting the Gaussian beam into structured light, demodulating the structured light after the structured light is transmitted to a receiving end and re-coupling the structured light back to the optical fiber; the signal receiving system is used for receiving and analyzing the optical signals. According to the invention, the optical frequency comb and the structured light are combined, and the problem that optical signals are easily influenced by atmospheric turbulence in free space optical communication can be effectively solved on the premise of ensuring large communication capacity.

This invention relates to the field of conductivity measurement technology, and more particularly to a high-temperature conductivity measurement system and method based on the eddy current method. The system includes a stage, a high-temperature eddy current probe, a moving device, a pyrometer, a laser heating subsystem, and a data measurement subsystem. The stage is used to place the sample to be measured. The high-temperature eddy current probe is used to receive an excitation signal and pick up the measurement signal. The moving device is used to move the high-temperature eddy current probe laterally above the sample. The laser heating subsystem emits a continuous laser in the near-infrared band to heat the sample. The data measurement subsystem generates a set of multi-frequency excitation signals to excite the high-temperature eddy current probe, determines the inductance changes corresponding to the multi-frequency excitation signals measured by the high-temperature eddy current probe at the same position above the sample, and calculates the conductivity of the sample based on the inductance changes. This invention enables accurate, non-contact measurement of the conductivity of materials under high-temperature conditions.

The invention discloses a size laser detection tool for a valve plate of a powder metallurgy power-assisted steering pump, and relates to the technical field of laser detection. The size laser detection tool for the valve plate of the powder metallurgy power-assisted steering pump comprises a bottom plate, a plurality of balls are arranged at the top of the bottom plate, an L-shaped block is fixedly connected to the top of the bottom plate, an air cylinder is fixedly connected to the top of the L-shaped block, a first moving block is fixedly connected to the telescopic end of the air cylinder, and a second moving block is fixedly connected to the telescopic end of the air cylinder. And the bottom of the first moving block is connected with a second moving block through a telescopic mechanism, and the bottom of the second moving block is fixedly connected with a mounting plate. According to the size laser detection tool for the valve plate of the powder metallurgy power-assisted steering pump, during laser detection, the valve plate can be conveniently centered and limited, meanwhile, the diameter, thickness and outer diameter of an inner hole of the valve plate can be continuously subjected to laser detection, and different positions of the periphery of the valve plate can be conveniently detected, so that the detection is more comprehensive, and the detection efficiency is improved. And the detection efficiency and quality can be improved.

The invention relates to laser processing, and provides a laser melting and strengthening combined processing system which comprises a continuous laser device, a laser processing device, a laser processing device, a laser processing device and a laser processing device, and is characterized in that the continuous laser device is used for generating continuous laser beams and melting powder materials through a melting light path; the ultrafast laser is used for generating an ultrafast pulse laser beam and carrying out strengthening processing on the surface of the product subjected to melting processing through a strengthening light path; and the galvanometer assembly is used for receiving the continuous laser beam guided out by the melting light path and the ultrafast pulse laser beam guided out by the strengthening light path. The invention further provides a laser melting and strengthening combined machining method. According to the combined machining system, the continuous laser is firstly adopted for 3D printing, then the ultrafast laser is adopted for strengthening the printing surface, the mechanical strength of a printed piece can be effectively improved, the ultrafast laser and the continuous laser share the galvanometer assembly, and space arrangement of a printing cavity is facilitated.

The invention provides a long-wave infrared laser reflector with a three-medium structure. The long-wave infrared laser reflector structurally comprises a substrate Sub, a transition layer B, a metal layer G, a medium film system C and an air layer A from bottom to top. The dielectric film system C is structurally characterized by being formed by alternately stacking one or more groups of materials with high, medium and low refractive indexes. The invention aims to realize high reflection of a long-wave infrared band. Through meticulous design, three kinds of materials with high, medium and low refractive indexes are reasonably distributed in the reflector. According to the strategy, the absorption of the reflector is effectively reduced by balancing the low absorption of the chalcogenide and the low refractive index of the fluoride, the temperature rise caused by heat absorption is remarkably reduced, and meanwhile, the reflectivity is improved. Therefore, the continuous laser damage threshold value of the reflecting mirror is greatly enhanced theoretically, and the reflecting mirror shows higher stability and tolerance when facing continuous laser irradiation.

The wind speed detection device (1) comprises: an output unit (2) that outputs a CW laser (L) whose frequency is nonlinearly and periodically modulated; a branching unit (3) that branches the CW laser (L) into a measurement light (Lm) and a reference light (Lr); a measurement optical system (6) that outputs the measurement light (Lm) into the atmosphere and receives the scattered light (Lf) of the measurement light (Lm) in the atmosphere as a signal light (Ls); and a detection unit (8) that outputs a detection signal (D) based on the interference result of the reference light (Lr) and the signal light (Ls).

The utility model provides a handheld continuous laser cleaning head which comprises a cleaning head connected with a QBH laser output head through a QBH fixing chuck. A first gas path is arranged in the QBH fixed chuck and covers the whole QBH fixed chuck; a QBH chuck cooling air path input interface and a QBH chuck cooling air path output interface which are communicated with the first air path are arranged on the QBH fixed chuck, the QBH chuck cooling air path input interface is used for connecting an external air compressor output air path, and the QBH chuck cooling air path output interface is used for connecting the output air path. According to the laser cleaning head, the purpose of heat dissipation is achieved in an indirect mode, the phenomenon of frequent self-protection shutdown of the laser cleaning head can be effectively avoided, and the normal operation stability and the cleaning efficiency of the cleaning head are greatly improved.

A laser assembly, including a first CW laser having a first fiber optic cable operationally connected thereto for directing a first CW laser output, a second QCW laser having a second fiber optic cable operationally connected thereto for directing a second QCW laser output, and a third Q-switched laser having a third fiber optic cable operationally connected thereto for directing a third Q-switched laser output. A fusion point is operationally connected to the first, second, and third fiber optic cables for combining the first, second, and third laser outputs into a composite output. A fourth fiber optic cable is connected to and extends from the fusion point for directing the composite output.

The invention belongs to the field of laser processing, and particularly relates to a device and a method for laser deposition of a nano-plating pattern on a flexible transparent base material, the device comprises a base, a target material supporting table used for installing a target material is arranged on the base, and a bearing substrate used for installing the flexible base material is arranged above the target material supporting table; the lower portion of the bearing base plate is connected with the base through a leveling mechanism, a tensioning mechanism is arranged on the bearing base plate and used for clamping and tensioning the flexible base material, and a laser projection area is arranged in the middle of the bearing base plate. The laser transmitter is arranged above the bearing substrate and comprises a first laser transmitter used for transmitting pulse laser and a second laser transmitter used for transmitting continuous laser; the detection device comprises a distance sensor and is used for detecting the distance between the base material and the target material; and the controller is electrically connected with the leveling mechanism, the detection device and the laser transmitter, is used for controlling the leveling mechanism according to a signal of the distance sensor, and is also used for controlling the laser transmitter to transmit laser. And uniform, efficient and rapid deposition of the nano coating is realized.

The invention provides a continuous and pulse coaxial double-beam welding method for a sheet titanium alloy corner joint process, and belongs to the technical field of laser welding. According to the method, continuous laser and pulse laser are adopted, coincidence arrangement of the two laser beams in space is achieved through a coaxial composite optical system to form a composite laser beam, the composite laser beam acts on a sheet titanium alloy corner joint assembled and fixed through a corner joint clamp, and the welding process is completed. The two laser beams are similar in wavelength, optical compatibility is good, and an optical system is stable. The coaxial composite heat source has the characteristics that the energy distribution gradient can be regulated and controlled, and the heat input is accurately controlled, so that the welding heat input can be effectively reduced while the mechanical property of the joint is ensured, and the residual stress is reduced to control the welding deformation. The sheet titanium alloy corner joint obtained through the method has the advantages of being uniform in welding seam forming, little in splashing, small in deformation and the like, and the technological requirements of the aerospace field for high-quality thin-wall titanium alloy structural parts are met.

The invention provides an energy and signal simultaneous transmission system, comprising: an emission unit comprising a first laser, a second laser and a beam combiner, the first laser being used for emitting pulse laser, the second laser being used for emitting continuous laser, the beam combiner being used for combining the pulse laser and the continuous laser into emission laser, the central wavelength of the emission laser, the central wavelength of the pulse laser and the central wavelength of the continuous laser are the same; and the multi-junction laser battery is used for receiving the emitted laser and outputting target current. The integration level of the simultaneous signal transmission system is improved, and the energy transmission performance and the signal transmission performance are both improved.

The invention provides a QCW laser driving device and method, and belongs to the technical field of quasi-continuous lasers. Comprising an FPGA; the input control module is electrically connected with the input end of the FPGA and is used for providing an input control signal for the FPGA; the BUCK step-down module is used for performing step-down processing on power supply input and then outputting the power supply input; the BOOST module is used for boosting power supply input and then outputting the power supply input; the constant current source module is electrically connected with the FPGA and the output end of the BUCK voltage reduction module or the output end of the BOOST module, and the BUCK voltage reduction module or the BOOST module provides working voltage for a constant current source; wherein the FPGA judges the current working mode of the laser LD according to a received input control signal, enables the BUCK step-down module or the BOOST step-up module to output working voltage, and drives the constant current source module to work in a near-continuous output mode or a pulse output mode.