761 results about "Divergence angle" patented technology

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 relates to the field of integrated optical fiber microscopic endoscopy, in particular to an all-optical-fiber light beam modulation and collection system based on double super lenses and a design method of the all-optical-fiber light beam modulation and collection system. The system comprises a single-mode optical fiber, a coreless optical fiber for beam expansion and two super lenses (a super lens 1 and a super lens 2) with different functions. The super lens 1 is arranged on the end face of the fiber core of the single-mode optical fiber and focuses output exciting light to form extremely small waist spots, and the divergence angle of light beams is increased. The super lens 2 is arranged on the end face of the coreless optical fiber beam expanding area and used for refocusing the exciting light and focusing the collected fluorescence to the focus position of the super lens 1 at the same time, and the fluorescence is incident to the fiber core in parallel through the super lens 1. According to the invention, a double-super-lens system based on a high numerical aperture (NA) is fully utilized, wavefront modulation is carried out, the length of a beam expanding area is adjusted, and the loss of fluorescence in the beam expanding area is reduced, so that the collection efficiency of the fluorescence is remarkably improved, and an innovative solution is provided for the design of a super-lens-based optical fiber optical system.

The invention relates to the technical field of head-up display, in particular to an HUD optical aberration correction method, system and device and a vehicle. The correction method comprises the following steps: generating a light beam through an LED light source or a laser light source, and adjusting the brightness and color parameters of the LED light source or the laser light source through a control circuit so as to adapt to different display requirements and environmental conditions; and the light beam is preliminarily shaped and collimated by the light beam shaping element until a proper divergence angle and a proper light spot size are met so as to meet the requirements of a coupling element. According to the invention, the light beam emitted by the light machine is subjected to one-dimensional or two-dimensional pupil expansion through the optical waveguide, and then view field expansion and aberration correction are carried out through the free-form surface mirror, so that the problems of large size, limited view field angle, small eye box range and insufficient imaging definition in the prior art are effectively solved.

The invention is suitable for the technical field of radars, and provides a radar control method and device, terminal equipment and a computer readable storage medium, and the method comprises the steps: controlling a laser radar to move for a preset step in a scanning direction after the laser radar completes a detection laser emission task of a current emission channel, and transmitting detection laser through a next emission channel, the emission task of the detection laser is completed by all the emission channels; wherein the preset step is smaller than the divergence angle of the scanning light spot of the current transmitting channel; filtering the echo data received by the current receiving channel according to the echo data received by the adjacent receiving channels to obtain a scanning result of the current receiving channel, and setting the moving step of the laser radar to be smaller than the divergence angle of the scanning light spot of each transmitting channel, so that the scanning light spots between the adjacent transmitting channels are overlapped to obtain a scanning result of the current receiving channel. The correlation of adjacent transmitting channels is improved, and the detection capability of the laser radar on a small target object is improved.

The invention provides a scanning-type single-photon laser radar system based on phase regulation, and the system employs a reflection-type liquid crystal spatial light modulator to carry out the phase regulation of a laser beam, and achieves the long-distance fixed-point focusing through the modulation of laser wavefront. And echo signal detection is carried out by using a single-photon detector. Before the reflection type liquid crystal spatial light modulator is used for carrying out phase regulation and control on a laser beam, the laser beam is divided into reference light and detection light through the light splitting module, and then the divergence angle of the laser beam is reduced through the beam expanding module; after phase regulation and control, scanning of a laser beam in a target area is controlled through a reflector and a two-dimensional scanning galvanometer.

The invention provides an optical cross system based on silicon-based liquid crystal and a control method, and relates to the field of optical elements, and the optical cross system comprises an optical fiber array, a micro lens array, a collimating lens, a polarization conversion module, a dispersion element, a focus lens group and a liquid crystal spatial light modulator. Optical signals are coupled through the micro-lens array, a divergence angle is compressed, and parallel light beams are formed through the double-agglutination collimating lens; the polarization conversion module separates the light beam into P / S polarized light and unifies the polarization state; the dispersion element separates light beams according to wavelength space, and the focus lens group forms an elliptical Gaussian light spot on the liquid crystal spatial light modulator; the liquid crystal spatial light modulator divides a light spot into a plurality of independent control areas in the long-axis direction, and single-wavelength multi-port output, power proportion regulation and control and monitoring signal extraction are achieved by dynamically modulating the reflection phase of each area. The control method comprises the steps of optical path processing, regionalized phase modulation and real-time monitoring feedback. According to the invention, flexible routing, power balance and lossless monitoring of wavelength channels can be realized.

The invention provides a wafer detection device. The wafer detection device comprises a light source, wherein the light source emits initial light to a wafer to enable the wafer to emit scattered light beams; the first reflecting mirror is positioned on one side, facing the light source, of the wafer and reflects at least part of the scattered light beam into a first reflecting light beam; the first lens group is located on the side, away from the wafer, of the first reflector and adjusts the first reflection light beam into a first adjustment light beam, and the divergence angle of the first adjustment light beam is smaller than that of the first reflection light beam; and the first detector is arranged on one side, far away from the wafer, of the first lens group and receives the first adjusting light beam. Therefore, the obtained surface image of the wafer is clearer, the distinguished minimum particle size can be smaller, the detection sensitivity of the wafer detection device is higher, and small-size defects can be better detected.

The invention provides a high-dynamic five-axis laser processing device based on double optical wedges, which can effectively improve the performance of five-axis laser processing equipment, and comprises a laser generator, a light field regulation and control module, a double-optical-wedge light beam offset module, a focusing and beam expanding module, a spectroscope, an observation system, a scanning module, a focusing module, a motion platform, a control system and operation software. The laser generator generates a laser beam, and the laser beam enters the double-optical-wedge light beam offset module after being regulated and controlled by the light field regulation and control module. The double-optical-wedge light beam deviation module deviates a laser beam from an optical axis, and the laser beam is parallel to the optical axis and enters the focusing and beam expanding module; the focusing and beam expanding module amplifies the off-axis amount of the laser beam and changes the divergence angle and diameter of the laser beam; then the laser beam enters the scanning module through the spectroscope; the laser beam is not parallel to the optical axis after passing through the scanning module, and finally the laser beam is transmitted to the machining surface on the motion platform after being focused through the focusing module.

The invention discloses a low-divergence-angle narrow-linewidth high-power semiconductor laser. Relates to the technical field of semiconductor lasers, in particular to a low-divergence-angle narrow-linewidth high-power semiconductor laser. According to the invention, the parabolic waveguide structure is etched in the light field expansion area, and the metal reflector is introduced to realize a novel light field expansion and metal reflector integrated structure, and the transverse divergence angle of a laser mode is reduced through the expansion structure at the tail end of the waveguide. The laser comprises a laser gain area, a light field expansion area and a spectrum purification area at the tail of the light field expansion area. The laser gain region, the light field expansion region and the spectrum purification region at the tail part of the light field expansion region are made of the same laser epitaxial material in the longitudinal direction, the laser gain region is adjacent to the light field expansion region along the horizontal light emitting direction, and the light field expansion region is adjacent to the spectrum purification region at the tail part of the light field expansion region along the horizontal light emitting direction; the longitudinal direction is the direction from the substrate to the contact layer.

The embodiment of the invention discloses an optical-mechanical system which comprises a light emitting assembly, a light receiving assembly and a light scanning assembly, the light scanning assembly comprises a first light scanning element and a second light scanning element, and the first light scanning element and the second light scanning element are arranged in the first linear direction. One of the light emitting assembly and the light receiving assembly is located on the side, away from the second light scanning element, of the first light scanning element, and the other one of the light emitting assembly and the light receiving assembly is located on the side, away from the first light scanning element, of the second light scanning element. According to the embodiment of the invention, the transmission paths of the transmitted optical signal and the echo optical signal can be prolonged, so that the light divergence angle is reduced, and the ranging performance of an optical-mechanical system is improved; and the light emitting assembly and the light receiving assembly can be separated in space, so that heat dissipation of the light emitting assembly and the light receiving assembly is facilitated. According to the optical-mechanical system provided by the embodiment of the invention, the passing rate of the optical-mechanical system during the 85 DEG C test of the vehicle gauge can be improved on the basis of realizing long distance measurement and high resolution, and the product yield is improved.

The utility model discloses a laser processing head and laser processing equipment. The laser processing head comprises a base, an optical assembly, a first lens and a first driving mechanism. Wherein a channel for laser to pass through is arranged in the base; the optical assembly is arranged in the channel and is used for forming a light path when the laser passes through; the first lens is arranged in the channel and located on one side of the light path. The first driving mechanism is in driving connection with the first lens and used for driving the first lens to enter or leave the light path so as to adjust the beam waist diameter of the laser. When the first lens is located outside a light path, the beam waist diameter when laser is incident is a numerical value, after the first lens enters the light path, the divergence angle when the laser is emitted from the optical assembly can be changed, and the beam waist diameter correspondingly changes at the moment, so that the purpose of changing the spot diameter when the laser is focused is achieved, and the energy density of the laser is changed. And the device is suitable for plates of different materials and sizes.

A metalens used for beam shaping, beam-shaping system and the generating method of the metalens are provided by the present application. The metalens is used to shape an incident beam, and a divergence angle at least in one direction of an outgoing beam obtained by shaping is greater than the divergence angle in the same direction of the incident beam.

A vertical cavity surface emitting laser diode (VCSEL) includes a substrate, a lower Bragg reflector (DBR) layer, an active region, an upper Bragg reflector (DBR) layer, and a current confinement layer. The lower DBR layer is on the substrate. The active region is on the lower DBR layer on the active region. The current confinement layer is inside or outside the active region. When the current confinement layer comprises a compound containing phosphorus, such as AlAsP or AlGaAsP, and the phosphorus (P) content is within a specific range, the insulation rate of the current confinement layer will not be excessively fast to the point of being difficult to control. Additionally, the reproducibility of the aperture in the current confinement layer between batches of the VCSEL production is improved. Furthermore, the divergence angle of the VCSEL can be further reduced, thereby significantly enhancing the sensing capabilities of Lidar or 3D sensing.

The invention discloses a MHz frame frequency high-speed spectral measurement system and method, and mainly solves the technical problems that a traditional spectrometer is low in frame frequency, cannot capture spectral change in a high-speed dynamic process in real time, is limited in application scene and the like. The spectral measurement system comprises a slit, a first collimating mirror, a spectral dispersion element, a spectral signal amplification module, a spectral coupling module, a spectral acquisition module and a data processing module, the slit is used for limiting an incident space of a light beam and changing a divergence angle of the light beam; the first collimating mirror is located on the side, away from the to-be-measured object, of the slit. The spectral dispersion element is located on a reflection light path of the first collimating mirror; the spectral signal amplification module is located on a diffraction light path of the spectral dispersion element; the spectrum coupling module, the spectrum acquisition module and the data processing module are sequentially arranged, the spectrum coupling module is used for focusing the spectrum band captured by the spectrum signal amplification module to form a spectrum image, and the spectrum image is acquired by the spectrum acquisition module and then transmitted to the data processing module.

The invention relates to the technical field of optical communication equipment testing, in particular to an integrated optical module multi-parameter testing system and method.The method comprises the steps that a multi-channel parallel testing unit synchronously collects light spot morphology, divergence angles, insertion loss and return loss space and transmission characteristic parameters through a transmission light path and a reflection light path; the parameter collaborative analysis module performs nonlinear correlation analysis and dynamic performance threshold evaluation based on a cross-dimension correlation model; the intelligent calibration engine dynamically adjusts the test benchmark and compensation parameters according to the environment temperature and the equipment aging attenuation model; the fault diagnosis and prediction unit identifies potential defect types of the collimator, constructs a performance degradation prediction model in combination with a working state and environmental stress, and predicts a performance evolution trend according to test data; and the test report generation module automatically generates a standardized and customized dual-mode test report, a quality grade label and a performance optimization suggestion according to the prediction result and the diagnosis conclusion. Therefore, the problems of poor test precision, low test efficiency and the like in the prior art are solved.

The invention relates to the technical field of microscopic imaging, and discloses a microscopic imaging system with resolution exceeding light spot size limitation. The system comprises a laser unit; the measured target unit is arranged in the reference arm light path; the tested target unit comprises a tested sample and a divergence angle adjusting element; the divergence angle adjusting element is used for adjusting the divergence angle of the reference light source passing through the tested sample; the spatial radio frequency marking unit comprises a reference arm light path and a measuring arm light path and is used for performing optical heterodyne interference processing on the laser beams according to the radio frequency driving signals of various frequencies to form a reference light source and a light spot array respectively; the reference light source enters the measured target unit and then is combined with the light spot array to generate a combined light beam; the image signal receiving unit is used for collecting the combined light beam and then generating light data; and the data processing unit is used for receiving the optical data and carrying out image inversion processing on the optical data to generate imaging data of the tested sample. According to the scheme, the resolution limit of the system is improved.

The invention relates to a laser radar system, in particular to a zero-blind-area noise-reducing atmosphere laser radar system and a detection method thereof. A zero-blind-area noise-reducing atmosphere laser radar system comprises a transmitting system which comprises a laser and a metasurface array connected with the laser, and the metasurface array is used for generating a perfect vortex beam with a micro-radian-level small divergence angle and a radial size not changing along with topological charge; the receiving system is used for receiving back scattering signals excited by the laser beams of the transmitting system, realizing optical signal collection through convergence and realizing optical signal extraction through a light splitting module at the rear end; and the photoelectric converter signal processing system is used for processing the optical signal of the receiving system and presenting the aerosol distribution condition of the whole atmosphere on a laser path. According to the system, zero-blind-area and high-signal-to-noise-ratio detection performance of the laser radar is realized based on a perfect vortex light source; the metasurface micro-nano photonic device is adopted, the size is small, the integration degree is high, and miniaturization of the laser radar can be achieved.

The invention relates to the technical field of axial focusing enhancement of a cyclotron, and provides an axial focusing enhancement method and system for a medical cyclotron, and the method comprises the steps: collecting vibration data, a beam intensity value, temperature data, the positions of all particles in a particle beam, the average magnetic field intensity, the magnetic field intensity difference, and the current; the divergence angle and energy of the particle beam are measured; determining an axial focusing effect evaluation value at the current sampling moment; determining the particle beam stability at the current sampling moment, and determining the magnetic field uniformity at the current sampling moment by combining the average magnetic field intensity and the magnetic field intensity difference at the current sampling moment; and the axial focusing effect evaluation value, the average magnetic field intensity and the current at the current sampling moment are combined to realize the axial focusing enhancement of the medical cyclotron. According to the invention, the focusing precision of axial focusing enhancement of the medical cyclotron and the stability of the focusing effect can be improved.

The present application relates to the field of laser processing technology, and in particular to a water-cooled beam expander with adjustable divergence angle, the water-cooled beam expander with adjustable divergence angle comprising a first water-cooled lens barrel and a second water-cooled lens barrel, the first water-cooled lens barrel comprising a first lens barrel housing, a first lens being arranged in the first lens barrel housing, the second water-cooled lens barrel comprising a second lens barrel housing, a second lens being arranged in the second lens barrel housing, a first thread being arranged at one end of the first lens barrel housing close to the second lens barrel housing, a second thread being arranged at one end of the second lens barrel housing close to the first lens barrel housing, the first lens barrel housing and the second lens barrel housing being threadedly assembled through the first thread and the second thread. The distance between the first lens and the second lens is changed by thread adjustment, so as to achieve adjustment of the divergence angle of the light beam, thus solving the problem that the divergence angle of the conventional water-cooled beam expander is generally unable to be adjusted, and the adjustment structure of a very small portion of the water-cooled beam expanders that can adjust the divergence angle is relatively complex, resulting in high cost.

The invention discloses a non-contact measurement system and method for the longitudinal distance between objects, and the method comprises the steps: measuring the position distance between an object and an adjacent object in a size-limited space: placing a light source on the surface of a workpiece, projecting an electromagnetic beam with a set divergence angle to a reference object, and forming an amplified light spot; image information, especially light intensity information, of the light spot and a part of reference object where the light spot is located at the projection position is received through a light receiver; and then the processor processes the image information to obtain geometric data of the light spots, including the positions of the light spots on the reference object, the lengths of the obtained light spots or the distances between different light spots, namely the projection lengths, the projection height from the light source to the reference object is calculated in combination with the divergence angle, and the longitudinal distance between the workpiece and the reference object is obtained in combination with the height of the light source. As long as the size of the light source is small enough and the light source can be placed into the chamber for processing the wafer, the longitudinal distance between the wafer and the top of the chamber can be accurately measured at any time, and the measurement accuracy related to wafer manufacturing is greatly guaranteed.

The invention relates to the technical field of projection modules, and particularly discloses an LCOS laser projection module, which comprises a laser light source module, a laser speckle eliminator, a reflector, a diffuser, a collimating lens, a fly-eye lens, a relay lens, a first linear polarizer, a polarizing beam splitter, an LCOS chip, a second linear polarizer and a projection lens which are sequentially arranged along a light transmission path, the laser light source module is provided with a light source optical axis and is used for emitting light, and the light is projected by the projection lens after being modulated along a light transmission path to form a projection image. The light emitted by the laser light source has the advantages of narrow divergence angle, small light-emitting area and good light concentration and collimation, the resolution of a projected image can be improved, the projected image is bright in color and high in definition, and the requirements of simple structure and small size are met. Meanwhile, the laser speckle can be eliminated through the matching of the laser speckle eliminator and the diffusion sheet, and the projection image can meet the high contrast through the existence of the first linear polarizer and the second linear polarizer.

The invention discloses a self-focusing three-dimensional annular photoelectric gas sensor probe and a sensor device, comprising a three-dimensional annular concave reflection ring, which is characterized in that a section of concave circular ring containing a central cross section is cut by taking the central cross section of a hollow sphere as a centrosymmetric plane reference, and the reflection ring is fixed on a base; the base is provided with two light beam inlet and outlet through holes, and the two light beam inlet and outlet through holes are respectively provided with a plane mirror forming a 45-degree angle with the central section; a laser and a detector are arranged below the two through holes respectively, and the optical axes of the laser and the detector are both perpendicular to the central section. According to the invention, a laser light source of a light cone-shaped light beam with a very small divergence angle is adopted, and the focusing characteristic of a three-dimensional annular concave mirror is utilized, so that the light beam which is reflected for multiple times is converged on light of a detector, and a self-focusing reflection system in which the light source and the detector are focuses mutually is formed. The difficulty of adjusting the light path is reduced; and the overall design reduces the complexity of the production process, improves the production yield and is beneficial to large-scale production.

The utility model belongs to the field of laser application, and relates to beam shaping of a laser, in particular to a small-divergence-angle laser based on a beam shaping technology. The problems that in the prior art for laser diode collimation, astigmatism of the diode cannot be calibrated through single-lens collimation, and cost is increased due to the fact that fast axis collimation and slow axis collimation need to customize a fast axis collimating lens with a proper focal length are solved. The utility model discloses a small-divergence-angle laser based on a beam shaping technology. A first collimating lens, a fast-axis beam shrinking device and a beam expander are sequentially arranged on an emergent light path of a first laser diode; the light emitting point of the first laser diode is located at the focal point of the first collimating lens, the fast axis beam shrinking device comprises a first cylindrical lens and a second cylindrical lens, and the focal points of the first cylindrical lens and the second cylindrical lens coincide. According to the utility model, the divergence angle of the laser diode is reduced to 0.1 mrad, so that the diameter of a light spot at 500m is less than 100mm, and the actual light spot observed in an experiment is 80mm.

A handheld drone denial device, characterized in that the device comprises a laser emission unit comprising a high peak power pulsed laser and an adjustable beam expander, a sighting unit comprising a range finder and a sighting scope, a control unit comprising a denial device start and laser emission unit trigger switch, a power supply and a housing, the configuration of the laser emission unit, sighting unit, control unit, power supply, the structure of the housing and the arrangement of the units including the power supply on the carrier satisfy that the device discovers, locks and measures the range of a drone target through the sighting unit, manually or automatically adjusts the output laser beam divergence angle of the beam expander according to the range measurement result, and then or simultaneously triggers the laser emission unit trigger switch to emit laser to the drone target, wherein the adjustment of the beam expander includes that the adjustment of the beam divergence angle from a range of 500 meters to a range of 100 meters is incremental adjustment, or the adjustment of the beam divergence angle from a range of 100 meters to a range of 500 meters is decremental adjustment.

The invention provides a coupling system for an on-chip light source and a photon chip. The coupling system comprises an input light source, a collimating lens, a focusing lens, a reflecting prism and an on-chip grating which are sequentially arranged in the direction of a light path, and an optical waveguide located on the side face of the on-chip grating. The collimating lens is used for primarily shaping emergent light of an input light source into a collimated light beam, the focusing lens is used for focusing the collimated light beam to the on-chip grating, and the collimating lens and the focusing lens are both aspheric plano-convex lenses. According to the system, non-uniformity caused by a large divergence angle of the semiconductor laser is effectively corrected through the aspheric micro lens, output of approximately parallel light beams is achieved, the light beams are accurately focused to the photon chip grating through the aspheric focusing lens subsequently, the coupling efficiency of light energy is greatly improved, and compared with two cylindrical lenses in the prior art, the coupling efficiency of light energy is greatly improved. The design of the focusing lens and the reflector is added, so that the number of optical elements is reduced, and error accumulation is reduced.

The invention discloses a light spot beam divergence angle calculation method and device based on adaptive threshold correction and a medium, and relates to the technical field of laser communication. The method comprises the following steps: continuously acquiring a debugging light spot picture output by image acquisition equipment, and calculating the maximum gray value of the debugging light spot picture; based on the maximum gray value, the exposure of the image acquisition equipment is adjusted until an initial light spot picture with the maximum gray value and the number of pixels reaching a preset threshold value is output; based on a preset initial pixel threshold value, calculating a pixel value variance of the initial light spot picture, and updating the initial pixel threshold value until a target pixel threshold value enabling the pixel value variance to reach a maximum value is obtained; setting a pixel value lower than a target pixel threshold value in the initial light spot picture to zero to obtain a target light spot picture; and calculating a first moment and a second moment of the target light spot picture to obtain a light spot beam divergence angle of the target light spot picture. According to the method, the calculation precision of the beam divergence angle of the light spot is improved by adjusting a threshold selection mechanism for maximizing the exposure degree and the variance.

The invention provides a filamentation cutting head, a laser cutting system and a filamentation cutting head design method, and relates to the technical field of laser control, and the filamentation cutting head comprises a shaping element, a collimating element and a focusing element which are sequentially arranged in the light propagation direction; a laser beam emitted by a laser is converted into a flat-topped beam through a shaping element with a first surface type, the divergence angle of the flat-topped beam is controlled through collimation of a collimation element, finally, the flat-topped beam is converged into a target filamentation beam with high energy utilization rate and high uniformity through a focusing element with a second surface type, and the filamentation beam can realize laser cutting of hard and brittle materials. The processing effect is improved; meanwhile, the filamentation cutting head adopts a total refraction element, not only has the advantages of simple design method, low lens processing difficulty and capability of coping with various materials, but also can convert all Gaussian beams into flat-topped beams and utilize all input energy to filamentation beams.

A method for compensating for a beam divergence angle of a laser beam is provided. The method comprises the steps that a compensation device is arranged at the laser beam emitting end of a device to be compensated, the compensation device at least comprises a liquid lens, and the liquid lens at least comprises a liquid lens cavity and liquid contained in the liquid lens cavity. The method further comprises the step of determining a second beam divergence angle of a second laser beam emitted by the laser beam emitted by the device to be compensated through the compensation device. The method further includes determining a voltage that needs to be applied to the liquid lens based on the second beam divergence angle. In addition, the method further comprises the step of driving the liquid lens to deform based on the voltage so as to compensate the beam divergence angle of the laser beam, so that the difference value between the compensated beam divergence angle and the expected beam divergence angle of the laser beam in the to-be-applied environment meets a preset condition. In this way, through the adjustable deformation of the liquid lens, the change of the laser beam divergence angle caused by the difference between the test environment and the to-be-applied environment is compensated, so that the accurate simulation test of the to-be-applied environment is realized.

The invention belongs to the technical field of dense spectrum beam combination, and particularly relates to a semiconductor laser beam quality self-optimization beam combination device and method. The device comprises a semiconductor laser group, a fast axis collimating mirror group, a slow axis collimating mirror group, a reflector group, a volume Bragg grating group and an external cavity mirror. A resonant outer cavity is formed between the rear cavity surface of each semiconductor laser and the outer cavity mirror, and after diffraction of the volume Bragg grating, part of laser transmitted to the outer cavity mirror is reflected to the volume Bragg grating again by the outer cavity mirror. The spectrum selection characteristic of the volume Bragg grating diffracts a laser mode meeting a Bragg diffraction condition into a chip of the semiconductor laser, and the mode competition characteristic of the semiconductor laser can enhance the laser mode into a main lasing mode to suppress other stray modes, so that the slow axis divergence angle of the semiconductor laser is reduced, and the performance of the semiconductor laser is improved. And the beam quality of the combined laser is improved. In addition, the volume Bragg grating automatically adjusts the semiconductor laser wavelength to the highest diffraction efficiency wavelength according to the light path angle.

The invention discloses an underwater optical communication routing method based on a three-dimensional dynamic conical sector, belongs to the technical field of underwater wireless communication, and is used for solving the problems of poor routing stability, low communication success rate, high energy consumption, non-adaptive path and the like in the existing underwater optical communication network. The method comprises the following steps: constructing an underwater optical communication network model in a three-dimensional space, and defining a dynamic cone communication sector based on a divergence angle and a direction angle between nodes; discovering neighbor nodes through a conical scanning mechanism, and performing multi-index optimization on candidate forwarding nodes based on distance progress, expected progress, energy efficiency indexes and time delay indexes; selecting an optimal path according to an evaluation result; performing competition coordination among candidate nodes by using a fast time slot response mechanism, and selecting a next hop node; and completing path construction through hop-by-hop transmission, dynamically adjusting a divergence angle, and executing path maintenance and updating. The method does not need global topological information, and is suitable for an underwater communication scene with uncertain node distribution in a dynamic environment.