28 results about "Laser synthesis" patented technology

The invention provides a polarization and spectrum combined laser synthesis system and method, and belongs to the field of laser beam synthesis, and the system comprises a laser seed source, an optical fiber beam splitting module, a phase control module, an optical fiber output module, a two-dimensional polarization coherent beam combination module and a dispersion element which are connected in sequence; the two-dimensional polarization coherent beam combination module is of a spatial three-dimensional structure; the number of the laser seed sources is m, the laser seed sources are arranged in parallel, each laser seed source corresponds to one optical fiber beam splitting module, and laser emitted by each laser seed source is divided into 2n sub-beams which have the same wavelength and are parallel to each other through the optical fiber beam splitting module, the 2n sub light beams respectively correspond to 2n phase control modules, 2n optical fiber output modules and the same two-dimensional polarization coherent beam combining module; the 2n sub-light beams are coherently combined into the same laser beam, and the m laser spectrums with different wavelengths are combined to obtain the high-power laser. According to the invention, high-power laser is synthesized by using the integrated light beam synthesis system.

The invention discloses a reflective all-dielectric polarization beam-combining grating suitable for any wave band. The reflective all-dielectric polarization beam-combining grating is composed of a grating etching layer, a phase matching layer, a periodic film system and a grating substrate in sequence from top to bottom. The invention has the characteristics of easy preparation, wide band and high diffraction efficiency, can effectively solve the problems of low PBS anti-laser damage threshold and low synthesis efficiency in the current polarization beam combination technology, and provides solid component support for the realization of the larger array scale and higher power laser synthesis technology in the future.

The present invention belongs to the field of laser synthesis technology, and specifically relates to a laser coupling device and method, which includes a fixed component and an input component and a receiving component therein, wherein the input component includes multiple input optical fibers and an input connector, and the receiving component includes a receiving fiber core and a receiving sleeve, wherein the receiving fiber core is connected to a receiving contact inside the receiving sleeve; a pressure liquid component is installed inside the fixed component, and the pressure liquid component includes a push plate 1 and a push plate 2, wherein the push plate 1 and the push plate 2 are respectively connected to the pressure plate 2 and the pressure plate 1. The present invention injects glue from the input tube and the receiving tube respectively, so that the glue at both ends can flow toward the input connector and the receiving sleeve respectively through the input optical fiber and the cladding, and then pushes the push plate 1 and the push plate 2 relative to each other, so that the push plate 1 and the push plate 2 respectively push the glue into the connecting tube through the pressure plate 2 and the pressure plate 1, thereby ensuring that the glue completely penetrates the gap between the various optical paths.

The invention discloses a discontinuous short pulse laser incoherent polarization time sequence synthesis device, and relates to the technical field of laser synthesis. The device comprises a beam combiner, and the beam combiner is used for combining multiple paths of lasers with mutually vertical polarization states of a main laser beam and an auxiliary laser beam into coaxially propagating light beams, so that the space structures of the two laser beams in a near field and a far field are completely overlapped, and the directivity is the same. The polarization state of the synthesized laser is consistent, and light amplification can be realized through the same amplifier; the device is suitable for synthesizing sub-laser with a wide repetition frequency range and supports repetition frequencies from several hertz to hundreds of hertz; in addition, the device can synthesize three or more paths of laser, the repetition frequency of the synthesized laser is the sum of the repetition frequencies of all sub-lasers, and the device has high expansibility and flexibility and is suitable for various complex laser application scenes.

The invention provides a preparation method and application of a precursor for laser synthesis of a MoS2 (WS2) film, and belongs to the technical field of semiconductor film materials.The preparation method comprises the following steps that S1, a container is placed in a water bath heating environment, deionized water, a molybdenum source or a tungsten source and a sulfur source are added, and a supersaturated solution is obtained after continuous stirring; and S2, in a water bath heating environment, adding a nonionic surfactant into the supersaturated solution, continuously stirring, and filtering after the nonionic surfactant and the supersaturated solution are fully mixed to obtain a precursor solution. Coating a substrate with the precursor solution, and drying the coated substrate; and irradiating the precursor solution coated on the substrate by using a laser beam to obtain the MoS2 (WS2) film. The process is simple and easy to implement, and rapid and low-cost preparation of the MoS2 (WS2) film can be realized.

The invention relates to the technical field of laser synthesis, and discloses a cross-environment self-adaptive laser coherent synthesis method, equipment and a medium. The method comprises the following steps: constructing environment distribution containing various parameter combinations, and randomly sampling an environment from the environment distribution at the beginning of each training period; training an adaptive strategy network based on a sampled environment; deploying the trained adaptive strategy network to a laser coherent combination system, and fixing network parameters of the adaptive strategy network; and updating the internal memory state through initial interaction between the self-adaptive strategy network and the current environment, and outputting a phase correction instruction to perform phase control of laser synthesis. According to the method, the environment overfitting problem existing in laser coherent synthesis in traditional reinforcement learning is solved, rapid self-adaption can be achieved only through a small amount of initial interaction, the debugging cost of system deployment and scene switching is greatly reduced, different noise, turbulence intensity and laser array scales can be adapted, and the stable and efficient phase locking control effect is always kept.

The invention belongs to the technical field of supercapacitors, and relates to an oxygen vacancy-rich ferric oxide silicon carbide composite material, and a preparation method and application thereof. A ferric trichloride precursor and silicon carbide nanowires are mixed and dried, melamine is dispersed on the surface of the dried material, and the ferric oxide silicon carbide composite material with oxygen vacancies is directly synthesized in air by adopting a one-step simple and rapid laser synthesis method. The synthesis method is simple, convenient and rapid, the synthesis process of the material can be completed in only a few seconds, the repeatability is high, and the material has a relatively strong industrial application prospect.

The invention provides a pulse laser polarization coherent beam combining system. The pulse laser polarization coherent beam combining system comprises a beam combining device, a polarization beam combiner, a first polarization controller, a second polarization controller and a phase control module. The beam combiner is used for combining the first sub-pulse laser and the second sub-pulse laser which are incident at the same time into main power linearly polarized light and secondary power linearly polarized light, and the energy proportion of the main power linearly polarized light is larger than that of the secondary power linearly polarized light; and the polarization beam combiner is used for receiving the primary power linearly polarized light and the secondary power linearly polarized light, carrying out beam combination and forming coherent output. By arranging a polarization controller and a phase control module, polarization state and phase adjustment is carried out on the primary power linearly polarized light and the secondary power linearly polarized light respectively, so that efficient coherent beam combination of the primary power linearly polarized light and the secondary power linearly polarized light is realized in the polarization beam combiner. According to the system, the strict requirements on the incident sub-pulse laser polarization state and power are relaxed, the beam combining efficiency is improved, the system is suitable for various polarization state inputs, and the universality and practicability of the system are enhanced.

The application relates to a multi-band high-power multi-core optical fiber laser, which comprises a pump excitation module, a pump beam combination module, a multi-band laser light source module and a light beam output module connected in sequence, the pump beam combination module is used for combining multiple multimode pump lasers generated by the pump excitation module into a high-power pump laser, the multi-band laser light source module is used for generating multiple target laser beams corresponding to target wave bands, and the light beam output module is used for separating the multiple target laser beams and respectively outputting the target laser beams corresponding to the target wave bands, wherein the multi-band laser light source module comprises a first multi-core fiber grating, a multi-core double-clad active optical fiber and a second multi-core fiber grating connected in sequence, the first multi-core fiber grating is connected with the pump beam combination module, and the second multi-core fiber grating is connected with the light beam output module; the application can solve the problems of a small number of working wave bands, a small wavelength interval and a low output power of the optical fiber laser.

The invention provides a spectrum synthesis device based on optical fiber laser polarization. A seed laser generator outputs multiple sets of seed laser at the same time, and a first beam splitter divides each set of seed laser into multiple beams of branch laser; the output characteristics of the branch lasers are modulated through the output characteristic controller, the branch lasers are synthesized through the polarization synthesizer to obtain synthesized lasers used for spectrum synthesis, the synthesized lasers are conveyed to the spectrum synthesizer through the coupling optical fiber, and spectrum synthesis is carried out on the multiple sets of lasers with different wavelengths to obtain synthesized lasers used for spectrum synthesis. And secondly, a first signal detector is further arranged on the side wall of the coupling optical fiber, power data of the synthesized laser is detected through the first signal detector, an output characteristic controller is controlled according to the power data, and the output characteristic of the synthesized laser is controlled through the output characteristic controller. The first signal detector can realize detection of synthesized laser power data without using high-power laser splitting, so that the structure of the spectrum synthesis device is simplified.

The invention discloses a method for preparing multi-component liquid alloy by laser at room temperature. The method comprises a substrate loaded with a precursor and a laser. The specific method comprises the following steps: firstly, uniformly mixing precursors of metal elements, further performing ultrasonic mixing on the precursors and liquid metal particles subjected to ultrasonic treatment, then transferring the mixture into a beaker, and performing laser synthesis and ultrasonic treatment in a liquid phase environment, so that the precursor salt is converted into the multi-element liquid alloy. The method is simple to operate, low in cost, mild in reaction condition, rapid, efficient, environment-friendly and pollution-free. The technology provided by the invention can realize the preparation of the multi-component liquid alloy at room temperature.

The invention provides a nanosecond pulse laser synthesizer for laser active illumination, and relates to the field of laser, and the nanosecond pulse laser synthesizer comprises a resonant cavity which comprises a rear cavity mirror and an output mirror; the gain module is located in the resonant cavity; the pumping source is positioned in the resonant cavity; the multiple Q-switching modules are all located in the resonant cavity and located between the gain module and the output mirror, and the multiple Q-switching modules are arranged at intervals; and the time domain regulation and control module is used for controlling the Q-switching modules to be turned on and turned off in sequence, the Q value of the resonant cavity is gradually increased along with turning on of the Q-switching modules, so that the nanosecond pulse laser synthesis device outputs a plurality of sub-pulse lasers, and the sub-pulse lasers are subjected to time domain synthesis to form a pulse string or a total laser pulse. The nanosecond pulse laser synthesizer can synthesize a pulse string or total laser pulses of different waveforms through sub-pulses, and can also reduce the risk of damage to optical devices.

The invention belongs to the technical field of fiber laser synthesis, and discloses a laser output device and a preparation method thereof, a laser and a laser processing device. And the laser output device comprises an output head shell, an end cap and an optical fiber bundle group. The end cap is arranged in the output head shell; one ends of the plurality of optical fibers are tightly attached to form an optical fiber bundle group, the optical fiber bundle group is directly connected with the end cap, and the optical fiber bundle group is formed by tapering the plurality of optical fibers, or the optical fiber bundle group is formed by drawing a plurality of optical fiber preforms. The optical fiber bundle group is directly connected with the end cap, so that the light spot of the laser is no longer fixed as a single light spot, and the shape of the light spot can be adjusted at any time according to different scenes. The laser device and the laser processing device provided by the invention comprise the laser output device.

The invention discloses an SPGD laser coherent synthesis method and system based on Kalman filtering prediction, and the method comprises the following steps: S1, calculating the variable quantity of a performance evaluation function and an original gradient vector, and taking the component of the original gradient vector as a measurement value of a Kalman filter; s2, on the basis of a preset state space model, predicting a relative phase state between each path of laser and the reference laser through a Kalman filter to obtain a predicted state; s3, fusing the measurement value and the prediction state through a Kalman filter to obtain optimal estimation; and S4, calculating a voltage correction value according to the optimal estimation, updating the control voltage of each path of laser based on the voltage correction value, and returning to the step S1 for cyclic execution to realize laser coherent combination. The conversion from reaction type control to predictive type control is realized, and control lag is made up to suppress dynamic noise; dependence on a single SPGD gain parameter is reduced, gain does not need to be increased for adaptive noise, and overshoot and oscillation are avoided; and the predictable characteristic of the noise is fully utilized.

Provided is a laser module which can be manufactured easily at low cost. A laser module (1) is provided with: a first laser unit (21) including a first semiconductor laser element (11) capable of emitting first emission laser light (L1) in a + X direction; a second laser unit (22) including a second semiconductor laser element (12) capable of emitting second emission laser light (L2) in the-X direction; a first mirror (51) that reflects the first output laser beam (L1) in a direction inclined with respect to a disposition surface (5A) of the base (5); a second mirror (52) that reflects the second emitted laser beam (L2) in a direction inclined with respect to the placement surface (5A) of the base (5); a glass block (60) that converts the emitted laser beams (L1, L2) into parallel laser beams (P1, P2), respectively; a beam splitter (64) that combines the parallel laser beams (P1, P2) as a combined laser beam (C); and a condensing unit (67) that condenses the synthesized laser light (C) and couples the condensed laser light (C) to the optical fiber (3). The laser units (21, 22) and the reflectors (51, 52) are arranged on the arrangement surface (5A) of the base (5).

The invention discloses a flow field measurement method based on multi-color laser synthesis of a novel spectrum and light field imaging, comprising the following steps: step 1, building an experimental optical path for multi-color laser synthesis, using three lasers emitting RGB three colors as excitation sources, and synthesizing a novel laser spectrum whose color changes along the depth direction; step 2, performing a calibration experiment, and extracting the axial depth point spread function of the novel laser spectrum; step 3, exciting a flow field to be measured with the novel laser spectrum, and imaging the flow field to be measured with a light field camera, and collecting a light field image; step 4, performing three-dimensional light field reconstruction on the light field image, and obtaining a three-dimensional particle field of the light field with color coding information; step 5, performing color / depth decoding on the three-dimensional particle field of the light field with color coding information, and obtaining a three-dimensional distribution image of particles at different depths; step 6, reconstructing a three-dimensional velocity field, and using a variational optical flow model based on a physical model to solve and obtain a three-dimensional velocity vector field of the flow field to be measured.

The invention discloses a method for preparing a MoS2 film through laser synthesis, and belongs to the technical field of inorganic semiconductor film materials. The preparation method specifically comprises the following steps: uniformly mixing water, a molybdenum source, a sulfur source and a surfactant to obtain a precursor solution; carrying out plasma treatment on a substrate, then coating the substrate with the precursor solution, and drying the coated substrate; and radiating the precursor solution coated on the substrate by adopting a laser beam, so that the precursor solution forms the MoS2 film. The process is simple and easy to implement, and rapid and low-cost molybdenum disulfide film preparation can be achieved.

The invention relates to a high-temperature combustion temperature field reconstruction system for laser spectroscopy. The system comprises the following steps: combining two beams of modulated laser into one beam by using an optical fiber beam combiner, and connecting the one beam into an optical switch; the optical switch is provided with an input channel and 64 output channels, each output channel is connected with one transmitting end assembly, the transmitting end assemblies transmit laser to a measurement area, the laser is received by the optical integrating sphere detection module and converted into electric signals, and then the electric signals are input into the signal analysis and processing module through the data acquisition system. The light intensity measurement module is used for processing background light intensity and transmission light intensity of a measurement area through digital phase locking and low-pass filtering; fitting an integral absorption area through a least square algorithm; and solving the high-temperature combustion temperature field by combining an adaptive gradient descent reconstruction algorithm with an ART iterative algorithm. According to the invention, the defects of weak anti-interference capability, low space utilization rate, insufficient effective path number and complex debugging of the existing measuring device are overcome.

The invention discloses a multi-core optical fiber-based laser synthesis system, which comprises a laser device, a multi-core optical fiber, a light beam regulation and control device and a reflection grating, and is characterized in that the laser device is used for providing multiple paths of laser with different wavelengths; the multi-core optical fiber is provided with N fiber cores, each fiber core is a hollow fiber core, the input end of each fiber core is connected with the laser device, the output section of each fiber core is a straight line, the output section of each fiber core is provided with an emergent end face, and the emergent end faces of the fiber cores are arranged in a one-dimensional array or a two-dimensional array. The light beam regulation and control device is arranged between the output end of the multi-core optical fiber and the reflection grating, and the reflection grating is used for reflecting the multiple paths of laser output by the light beam regulation and control device and enabling the multiple paths of reflected laser to be on the same straight line, so that the multiple paths of laser gathered on the reflection grating are synthesized into one path of synthesized laser. A traditional synthesis light path design can be simplified, the size and the weight of the synthesis device are remarkably reduced, and the application range of the high-energy laser is further expanded.

The application provides a variable multi-waveband synthesis active light source device and method, which comprises an active light source synthesis device and a power supply control device; the active light source synthesis device comprises a laser synthesis module arranged on a base and three laser light emitting devices of different wavebands; the power supply control device comprises a master control module and a frequency control module comprising three frequency controllers, each frequency controller corresponding to a waveband laser generator to control the laser emission frequency of the waveband; the laser synthesis module comprises a first lens and a light combining prism, and the three waveband laser beams emitted by the three laser light emitting devices form a synthesized laser output through the light combining prism and the first lens; the application controls the corresponding laser diode light emission frequency by sensing the external light intensity to synthesize laser beams of different colors, and processes the synthesized laser beams by using a light shield, so that the finally emitted active light source can be better observed by electronic devices such as a camera and a camera.

This invention provides a laser synthesis wavelength measurement interferometer based on optimized fiber coupling. The interferometer includes: a composite laser source, a fiber coupler assembly, a fiber beam splitter assembly, a polarization beam splitter assembly, an adjustable optical path reference fiber, an adjustable optical path measurement fiber, a photodetector assembly, and an electronic control system, all interconnected. The composite laser source emits two laser beams with wavelengths λ1 and λ2 respectively. The fiber coupler assembly includes a first fiber coupler, a second fiber coupler, and a third fiber coupler. The fiber beam splitter assembly includes a first fiber beam splitter and a second fiber beam splitter. The polarization beam splitter assembly includes a first polarization beam splitter and a second polarization beam splitter. The photodetector assembly includes a first photodetector, a second photodetector, and a third photodetector. This invention improves the measurement accuracy of the interferometer, and damaged parts of the interferometer can be replaced individually, facilitating maintenance by repair personnel.

The invention discloses an intermediate infrared fiber laser with high polarization slope and adjustable efficiency, which adopts an optical coupler to construct a loop reflector as an output port of the fiber laser. The polarization state of an internal light field of the loop reflector is adjusted through the polarization controller to realize 0-100% continuously adjustable reflectivity, so that the maximum output power is realized under all pumping powers, and parabolic slope efficiency is formed; and the other side of the optical fiber oscillator is composed of a polarization-sensitive high-efficiency reflector, so that the laser has high polarization selectivity. According to the invention, the resonant cavity of the non-polarization-maintaining fiber laser can be effectively utilized, linear polarized laser output with the extinction ratio exceeding 99.997% or circular polarized laser output with the same dual-polarization power can be realized along a fast axis or a slow axis, and conditions are provided for remote sensing or coherent laser synthesis.

The present invention relates to a multi-band laser beam combining system and a beam control method, comprising a laser beam combining module and a synthetic beam monitoring module, wherein the laser beam combining module comprises a sub-beam laser, a control reflector, a beam combining mirror and a high-reflection mirror, wherein the sub-beam emitted by the sub-beam laser irradiates the control reflector, is reflected by the control reflector and reaches the beam combining mirror to be combined into a synthetic beam, passes through the beam combining mirror and reaches the high-reflection mirror, reflects the synthetic laser from one side of the high-reflection mirror, and outputs a test beam from the other side to enter the synthetic beam monitoring module. Compared with the prior art, the present invention has the advantages of realizing the synthesis of multiple beams, being suitable for lasers of various energies or wide bands; realizing the absolute position control of each beam, and then ensuring the synthesis accuracy through feedback adjustment; ensuring the pointing stability of the laser synthetic beam, and reducing the difficulty of the subsequent laser emission system.

A high-throughput laser synthesis method and application of graphene-supported nanoparticles, belonging to the fields of nanomaterials and electrochemical technologies. The synthesis method includes the following steps: S1: In-situ conversion is carried out by using a laser to scratch a polyimide polymer film or a polyethyleneimine polymer film for the first time to obtain a graphene substrate; S2: Subsequently, a metal precursor salt solution is dropped onto the graphene substrate, and after drying treatment, laser scratching is carried out for the second time to obtain graphene-supported nanoparticles. The graphene-supported nanoparticles are used as the positive electrode material of a Li-CO2 battery, and it includes the following steps: The graphene-supported nanoparticles and a binder are mixed evenly at a mass ratio of (8-9):(1-2) to obtain a mixture; Subsequently, an NMP solvent is dropped into the mixture and ground to obtain a slurry; The slurry is dropped onto carbon paper and dried to obtain the positive electrode of the Li-CO2 battery.

The present invention discloses a multi-channel laser synthetic aperture emission system, including a fiber laser system, a polarization beam combiner system, a beam combiner system, and a Cassegrain beam expansion system. The fiber laser system is composed of six fiber lasers, and the polarization beam combiner system is composed of three polarization beam combiners (PBCs). The same wavelength light emitted by the six fiber lasers is synthesized and polarized by the polarization beam combiners (PBCs) in pairs to obtain three parallel high-power coherent polarization composite light beams. The beam combiner system then forms a triangular annular aperture laser beam, which is finally reflected by the Cassegrain beam expansion system. The multi-channel laser synthetic aperture emission system of the present invention has a simple structure and a compact layout. It effectively breaks through the power limit of a single-channel fiber laser output through the coherent polarization synthesis technology. The three-channel laser is combined by the beam combiner system. The beam combining method is simple and easy to implement. The combined beam power is high, the quality is high, the cost is low, and the stability is good.

The invention belongs to the technical field of laser synthesis, and particularly relates to a laser coupling device and method.The laser coupling device comprises a fixing assembly, an input assembly and a receiving assembly, the input assembly and the receiving assembly are arranged in the fixing assembly, the input assembly comprises a plurality of input optical fibers and input connectors, the receiving assembly comprises a receiving fiber core and a receiving sleeve, and the receiving fiber core is connected with a receiving contact in the receiving sleeve; the liquid pressing assembly is installed in the fixing assembly and comprises a first push plate and a second push plate, and the first push plate and the second push plate are connected with the second pressing plate and the first pressing plate respectively. According to the invention, a glue solution is injected from an input pipe and a receiving pipe, so that the glue solution at two ends can flow towards an input joint and a receiving sleeve through an input optical fiber and a cladding, and then a push plate I and a push plate II are relatively pushed, so that the push plate I and the push plate II push the glue solution to extrude the interior of a connecting pipe through a pressing plate II and a pressing plate I; and the glue solution is ensured to completely permeate into the gaps among the light paths.

This application provides a laser beam combining polarization and spectral characteristics system and method, belonging to the field of laser beam combining. The system includes, in sequence, a laser seed source, an optical fiber beam splitter module, a phase control module, an optical fiber output module, a two-dimensional polarization coherent beam combiner module, and a dispersive element. The two-dimensional polarization coherent beam combiner module has a spatial three-dimensional structure. There are m laser seed sources arranged side-by-side, each corresponding to one optical fiber beam splitter module. The laser emitted by each seed source is split into two beams by the optical fiber beam splitter module. n Sub-beams of the same wavelength and parallel to each other, 2 n The beams correspond to 2 respectively n One phase control module, 2 n One fiber optic output module and the same two-dimensional polarization coherent beam combiner module; 2 n A high-power laser is obtained by coherently combining multiple laser beams into a single laser beam, and by combining the spectra of m laser beams with different wavelengths. This application utilizes an integrated beam combining system to synthesize a high-power laser.

This disclosure provides systems, methods, and apparatus related to optical systems. In one aspect, a method includes: generating a plurality of laser beams; receiving the plurality of laser beams at the point at a diffractive optical element, the diffracting optical element diffracting the plurality of laser beams to generate a plurality of output laser beams including a central laser beam and a plurality of side laser beams; measuring a power of at least two of the plurality of output laser beams generated by the diffractive optical element; determining a phase error in laser beams of the plurality of laser beams from the power of the at least two of the plurality of output laser beams; and changing the phase N−1 laser beams of the plurality of laser beams, with N being a number of the plurality of laser beams.