3548 results about "Light modulation" patented technology

The invention discloses a special environment laser radar system and method based on polarization modulation and laser coding. The laser radar system comprises a polarization modulation laser emitting unit, a multi-channel receiving unit and a compressed sensing reconstruction unit. The polarization modulation laser emission unit comprises a laser, a beam expanding module, a spatial light modulator, a micro galvanometer array, a spatial filter and a first focusing lens which are arranged in sequence; the multi-channel receiving unit comprises a second focusing lens, a polarization beam splitter and a single-pixel detector array which are arranged in sequence; and the compressed sensing reconstruction unit comprises a compressed sensing processing module, an image reconstruction module and a loop adaptive control module which are arranged in sequence. The anti-interference capability in a complex environment is enhanced through polarization modulation, the detection resolution and the signal-to-noise ratio are improved in combination with laser coding, the imaging quality and stability of the laser radar in a special environment are greatly improved, and the method can be widely applied to the fields of military reconnaissance, disaster rescue, unmanned driving and the like.

The embodiment of the invention provides an electro-optical modulator and a light quantum computer. The electro-optical modulator comprises an electrode assembly and an optical waveguide assembly. The electrode assembly comprises a positive signal electrode, a negative signal electrode, a first grounding electrode and a second grounding electrode, and the positive signal electrode and the negative signal electrode are arranged between the first grounding electrode and the second grounding electrode. The optical waveguide assembly is configured to bear optical signals and comprises a first optical waveguide and a second optical waveguide, the first optical waveguide is located between the positive signal electrode and the negative signal electrode and used for bearing first optical signals, and the second optical waveguide is located between the first grounding electrode and the positive signal electrode or between the second grounding electrode and the negative signal electrode and used for bearing second optical signals. The carrier is used for bearing second optical signals. Constant-amplitude voltage signals with opposite phases are applied to the positive signal electrode and the negative signal electrode which are tightly coupled, so that the modulation efficiency can be improved, and the common-mode noise can be reduced.

Methods include generating a modulated light pattern using a light modulator (108), transmitting the modulated light pattern through an objective lens (104) to a surface of a substrate (150), where the objective lens (104) defines an object plane, obtaining a plurality of images of the modulated light pattern reflected from the surface of a substrate (150), where each modulated light pattern is obtained at a different relative distance between the objective lens (104) and the substrate surface, analyzing the plurality of images to determine a reference location of the substrate surface relative to the objective lens (104) that corresponds to positioning of an image of the modulated light pattern formed by the objective lens (104) at the object plane, and adjusting a position of the substrate (150) relative to the objective lens (104) based on the reference location.

The invention relates to the technical field of hyperspectral imaging, in particular to a single-pixel hyperspectral imaging method and device based on time domain stretching. The method comprises the following steps: broadband signal light passes through a sample to be detected to obtain two-dimensional image information and one-dimensional spectral information, a mask pattern is generated by using a spatial light modulation module, and spatial coding modulation is performed on the signal light carrying the sample information; the broadband signal light subjected to space coding is effectively collected through a multimode optical fiber, different space frequency components are homogenized, then time stretching is conducted through a time stretching module to achieve separation of different wavelengths in the time domain, and time domain information of signal pulses is recorded through a single-pixel detector; time is mapped back to a frequency spectrum through the accurate corresponding relation between the signal light frequency and the time delay amount, and a hyperspectral image is obtained according to the known mask sequence and the signal intensity corresponding to different wavelengths in combination with an association algorithm. According to the technical scheme, high-spectral imaging with high speed, high spectral resolution and high sensitivity can be realized.

The invention provides a liquid crystal dopant with thermal-photoelectric triple response and an application of the liquid crystal dopant on intelligent glass. The molecular formula of the liquid crystal dopant is shown as a formula (1). The liquid crystal dopant is doped in a liquid crystal material, can respond to temperature, illumination and an electric field at the same time by combining the unique optical and electrical characteristics of the liquid crystal material, and adapts to various environment requirements; a plurality of optical states can be provided to meet energy-saving requirements in different scenes; the light modulation rate is high, the haze is large, and the privacy protection function is strong; the material is simple in preparation process, few in synthesis steps, good in stability and low in raw material cost, can be applied to the fields of residences, commercial buildings, automobiles, airplane windows and the like, and has a wide application prospect.

The invention belongs to the related technical field of lasers, and provides a high-power subnanosecond-nanosecond laser in order to solve the problems that the range adjustment and the application range of an existing laser are limited, and the structural stability needs to be improved. A modulation semiconductor seed source, an optical fiber pre-amplifier, a light beam isolation system, a high repetition frequency solid pre-amplifier, an acousto-optic modulator frequency reduction module and a multi-stage solid single-pass main amplifier are sequentially arranged along an optical path, continuous adjustable output of repetition frequency and pulse width is achieved, the adjustable range of the repetition frequency is 100 kHz to 1 MHz, the adjustable range of the pulse width is 100 ps to 10 ns, and the adjustable range of the pulse width is 100 ps to 10 ns. The laser power and the light beam quality are remarkably improved, and the method is suitable for the fields of high-precision micromachining, nonlinear optical research, medical cosmetology and the like.

A wide-field dynamic magnetic imaging device and method. The wide-field dynamic magnetic imaging device comprises: a probe assembly (1), comprising a diamond (101) containing NV centers; a microwave magnetic field assembly (2) configured to generate a uniform microwave field and a uniform bias magnetic field in the vicinity of the diamond (101), so as to regulate the spin energy level of the diamond (101) and the quantum state evolution process; a laser modulation assembly (3) configured to output an initial uniform pulsed laser to excite the diamond (101) to emit fluorescence; a fringe light modulation assembly (4) configured to modulate the initial uniform pulsed laser to output a fringe pulsed laser, causing the fluorescence emitted by the diamond (101) to be fringe fluorescence, or to modulate the fluorescence emitted by the diamond (101) into fringe fluorescence; a fluorescence detection assembly (5) configured to perform spatial imaging on the fringe fluorescence to obtain magnetic field information of a sample under test (7), thereby obtaining an initial magnetic image of said sample (7); and a data processing assembly (6) configured to perform Fourier transform and inverse Fourier transform on the initial magnetic image to obtain a first magnetic image.

The invention discloses an optical frequency comb generation method and device based on Brillouin scattering and an electro-optical modulator, and belongs to the field of photoelectric measurement. The method comprises the steps that a first laser and a second laser are used for generating pump light and seed light respectively, multi-wavelength pump light is generated through a cascade electro-optical modulator, the pump light and the seed light are emitted into a Sagnac loop, an optical frequency comb is output through the forward Brillouin scattering effect of an optical fiber and the electro-optical modulator, and the seed light and the pump light are output. The polarization controller is adjusted to optimize polarization state matching of the pump light and the seed light, so that the Brillouin scattering effect reaches the maximum value. The device is composed of a laser, an electro-optical modulator, a signal generator, an optical amplifier, an optical isolator, an optical coupler, a polarization controller and an optical fiber. The optical fiber forward Brillouin scattering effect and the electro-optical modulator are combined, the optical frequency comb giving consideration to the wide frequency spectrum and the narrow interval is generated, meanwhile, the comb tooth interval of the optical frequency comb can be accurately controlled by independently adjusting the frequency of the signal generator, and accurate measurement of signals or objects is achieved.

The invention discloses a light spot shaping device based on wave plate polarization conversion and a use method, and relates to the technical field of laser processing, the device divides random polarized light into S / P light through a first polarization beam splitter (PBS), converts the S light into P light through a first 1 / 2 wave plate, modulates the S light through a conventional silicon-based liquid crystal spatial light modulator (LCoS SLM), and converts the P light into the S light through a second 1 / 2 wave plate. And the beams are combined by the second PBS. The method comprises the steps of light splitting, polarization conversion, phase modulation, beam combining, beam expanding and focusing and the like. The double 1 / 2 wave plates are combined with the conventional PBS, the laser energy utilization rate is higher than 85%, commercial SLM equipment is adapted, the machining efficiency of the shaped annular light spots is remarkably improved compared with that of Gaussian beams, the method is suitable for laser welding and metal 3D printing, and the problems of energy waste and high cost are solved.

The system comprises a projection module, an imaging module and a phase resolving module, the projection module comprises at least three light source units and light modulation units corresponding to the light source units, an emergent light path of at least one light source unit is provided with an optical coupling assembly, and the emergent light path of at least one light source unit is provided with an optical coupling assembly. The light modulation unit is used for carrying out gradient phase modulation on a light beam, and the optical coupling assembly couples a light path modulated by the light modulation unit to a coaxial light path of the imaging module; the imaging module is arranged on a path sharing the same optical axis with the optical coupling assembly and is used for acquiring a stripe image modulated on the surface of the measured object; the phase resolving module is used for solving a wrapping phase of the fringe image output by the imaging module and unwrapping the wrapping phase based on a quality image guided space phase unwrapping algorithm; while the high-frequency sine fringe generation capability is ensured, collaborative optimization of phase distribution and light intensity characteristics is realized, and the contradiction between device miniaturization and optical performance is effectively reconciled.

The invention discloses an MZ silicon optical modulator phase bias point adjusting method, electronic equipment, a medium and a program product thereof, and belongs to the technical field of optical communication. The minimum value and the maximum value of the sampling voltage of a photoelectric detector in any period and the current value range of a Heater corresponding to a monotone increasing interval or a monotone decreasing interval are searched; and then a set phase offset point is indexed in the current value range of the Heater. According to the invention, ADC sampling I / O port resources of a pair of differential photoelectric detectors and a micro control unit (MCU) of an MZ silicon optical chip are utilized, and the detection voltage of a photoelectric detector (MPD) of the MZ modulator is periodically changed in a sine rule along with the current change of a thermo-optic phase shifter (Heater); and the phase offset point locking value only needs to select one working point of any period as the modulation locking point of the optical module.

The invention relates to an integrated microcavity optical comb repetition frequency and optical frequency locking device and method, and belongs to the technical field of integrated microcavity optical combs. The locking device comprises a pumping module, a power amplification module, a phase modulation module, an electro-optic driving module, an acousto-optic modulation module, an acousto-optic driving module, a band-pass filtering module, a micro-ring resonant cavity and a beam splitting module; the device comprises a soliton detection module, a control module, a repetition frequency detection module, a first feedback control module, an acetylene frequency stabilized laser, a beat frequency module, an optical frequency beat frequency detection module and a second feedback control module. The locking device can achieve full frequency locking of the microcavity optical comb, has the advantages of being high in frequency stability, wide in servo bandwidth, simple and compact in structure, tight in locking, low in noise, high in reliability and low in cost, and can provide a powerful tool for the field of precision measurement.

The invention discloses a full-polarized light acoustic imaging method and device based on a vector absorption ball. The method comprises the following steps: expressing light absorption characteristics of a sample by establishing a mathematical model of the vector absorption ball; measuring the absorption intensity of the sample absorber under the exciting light in different polarization states through a photoacoustic signal; reconstructing a vector absorption ball of each point of the sample according to the absorption intensity of each point of the sample under different polarized exciting light; five structural parameters are extracted through the vector absorption balls at all points of the sample to reconstruct a structural characteristic diagram of the sample; the full-polarized light acoustic imaging device based on the vector absorption ball comprises a polarized pulse light modulation excitation module, a signal detection module, a two-dimensional scanning module and a signal processing module. The method provided by the invention overcomes the defect that the polarization absorption of the sample cannot be completely expressed by the traditional polarized light acoustic imaging, and realizes the measurement of the full-polarization absorption characteristic and the complete structure expression of the corresponding sample in the same set of light path.

The invention discloses a path planning method and device based on a photon pulse reinforcement learning network, and relates to the field of photon pulse reinforcement learning networks, and the method comprises the steps: adjusting the phase of each phase shifter in an explicit MZI network according to a multi-level pulse neural network, and configuring a weight matrix; carrying out pulse signal loading on the light source by using a light modulator to obtain an input signal; obtaining a plurality of linear calculation results by using the weight matrix and the input signal through an interference effect and a coupling effect; inputting the plurality of linear calculation results into the DFB-SA laser, and obtaining a nonlinear activation result by adjusting the injection current of a gain region of the laser and the reverse bias voltage of a saturation region of the laser; and taking the nonlinear activation result as a new input signal, and returning to the step of obtaining a plurality of linear calculation results by using the weight matrix and the input signal until calculation of all levels in the pulse neural network is completed, so that path planning which is high in speed, low in power consumption and easy to configure is realized.

The invention relates to the technical field of spectral imaging detection, in particular to a spontaneous-stimulated Raman co-localization single-cell substructure atlas analysis system and a spontaneous-stimulated Raman co-localization single-cell substructure atlas analysis method. The system comprises a femtosecond pulse excitation module used for outputting two beams of broadband femtosecond pulse laser with different frequencies and continuously adjustable optical power; the Stokes light modulation module is used for modulating the Stokes light and carrying out space beam combination on the Stokes light and the pump light; the pump light modulation module is used for modulating pump light; the spontaneous Raman laser continuous adjusting module is used for outputting spontaneous Raman laser; the stimulated Raman exciting light co-positioning module is used for combining the combined laser and the spontaneous Raman laser again, focusing the combined laser and the spontaneous Raman laser on a sample, exciting a stimulated Raman scattering signal, converting the stimulated Raman scattering signal into a digital signal and carrying out data acquisition; and the spectrum detection module is used for collecting the spontaneous Raman scattering light which is reflected and returned along the original light path, and collecting a spectrum signal to form a Raman spectrum. The method has the advantage of improving the accuracy of single-cell heterogeneity structure and cancer cell type discrimination.

The invention relates to an optical system which comprises a light path transmitting subsystem, a scanning reflector (6) and an image receiving and processing subsystem. The light path emission subsystem comprises an illumination module (1), a light modulation module (4) and a curved prism (21). The curved surface prism comprises a light incident surface (21A), a reflection-transmission composite interface (21B) and a curved surface (21C) plated with a reflecting film, and is used for changing the direction of a light path and focusing the light path, so that the light path enters from the light incident surface, is reflected by the reflection-transmission composite interface, is reflected by the curved surface and is focused; and then the light is emitted from the reflection-transmission composite interface and enters the light modulation module at a specific angle. The invention also relates to an oral digital impression instrument equipped with the optical system. According to the optical system, the curved prism is used for replacing a traditional lens and reflector combination, the space size of the oral cavity digital impression instrument is remarkably reduced, and the requirements for miniaturization and portability are met.

An adjustment method of a laser processing apparatus includes a spatial light modulator adjustment step of adjusting a spatial light modulator into a state ready for splitting a laser beam emitted from a laser oscillator and applying a plurality of laser beams such that laser beams will have a desired positional relation, a processing mark formation step of operating the laser oscillator to apply the laser beams to a wafer such that a plurality of processing marks is formed, an imaging step of stopping the laser oscillator, and imaging the processing marks formed at the wafer, and an aberration correction step of correcting aberration of the condenser by comparing the desired positional relation and a positional relation among the imaged processing marks, and adjusting the spatial light modulator such that the positional relation among the processing marks conforms to the desired positional relation.

The invention discloses a preparation method of a thin-film lithium niobate electro-optical modulator and the electro-optical modulator, relates to the technical field of optical communication, and can be used for preparing the electro-optical modulator which is relatively small in size, relatively low in preparation difficulty and low in waveguide transmission loss. The method comprises a first substrate, a grating layer located on the first substrate, a target second dielectric film located on the grating layer, the grating layer is formed by etching a first dielectric film, the surface roughness of the target second dielectric film is smaller than 1 nm, and the refractive index of the target second dielectric film is smaller than that of the first dielectric film; the lithium niobate substrate comprises a lithium niobate thin film formed by ion implantation and a target third dielectric film located on the lithium niobate thin film, and the surface roughness of the target third dielectric film is smaller than 1 nm; bonding the target second dielectric film and the target third dielectric film to obtain a bonding structure; stripping the lithium niobate substrate in the bonding structure; and etching the lithium niobate film to form a ridge-shaped waveguide structure layer, and then forming a waveguide transmission covering layer.

The invention discloses a transparent part defect detection method and system based on dual-optical-path phase deflection, and belongs to the technical field of optical detection. The system comprises a camera, a reflection light source, a spectroscope, a backlight light source and a processing unit. The detection method comprises the steps of primary measurement, product overturning, secondary measurement and defect comprehensive analysis and classification. A depth map and a modulation degree map of the surface of a product are obtained through reflective measurement, a phase difference map and a backlight modulation degree map are obtained through transmission-type zero reference surface differential measurement, multi-dimensional data are fused, and accurate detection and classification of concave and convex points, foreign matter, scratches and other defects are achieved according to preset logic. The method can effectively eliminate inherent errors of the system, realizes double-sided full detection without omission, is high in detection precision and accurate in defect classification, and is suitable for defect detection of transparent parts such as multilayer transparent glass.

The invention discloses a laser frequency stabilization system based on Faraday anomalous dispersion atomic filtering, which is used for carrying out frequency stabilization on phase modulation multi-sideband laser, and comprises a frequency doubling laser unit which is configured to comprise a fundamental frequency seed light source, an electro-optical modulator, a fundamental frequency amplifier and a frequency doubling crystal; the light splitting module unit is configured to split the frequency doubling light into a main output light path and a monitoring light path; the atomic optical rotation filter is located on the monitoring light path and is configured to maintain the purity of the frequency-stabilized laser spectrum through purification treatment under the control of the axial magnetic field and the temperature; the frequency stabilization unit is configured to be a frequency stabilization light path and a servo system, and the frequency stabilization light path is used for obtaining laser frequency information and generating an error signal; the servo system is used for controlling the frequency of the fundamental frequency seed light source according to the error signal feedback. According to the laser frequency stabilization system provided by the invention, the spectrum purification and frequency stabilization precision can be improved, so that high-frequency stability locking is realized.

The invention discloses a full-automatic intelligent multifunctional high-order nonlinear fluorescence dynamics testing method and device, and relates to the field of nonlinear optics and nano photonics. An optical testing device composed of an exciting light generation module, an automatic power regulation module, an exciting light modulation module, a sample scanning module, a data acquisition and analysis module and an intelligent control module is established, and under the excitation of incident laser, based on the overall coordination of the intelligent control module, the optical testing device is established. Other modules are driven to complete the dynamic response test of a nonlinear fluorescence sample, and full-automatic intelligent, multifunctional, high-precision, simple, efficient, low-cost and universal fluorescence dynamic test analysis is realized. The problems that traditional manual operation wastes time and labor and the testing precision is low are solved. In addition, the multifunctional integration of the fluorescence response curve, the fluorescence rise time, the fluorescence lifetime and the fluorescence imaging effectively improves the test efficiency and the application scene, and greatly reduces the system cost.

The invention relates to the technical field of multi-parameter dynamic monitoring, in particular to a multi-parameter dynamic monitoring system and method based on a fiber bragg grating. Comprising a light source modulation module, an optical signal amplification and distribution module, a dense fiber grating array module, a phase sensitive interferometer enhancement module, an intelligent demodulation algorithm processing module, a multi-dimensional parameter fusion analysis module, a data acquisition and storage module and a system control remote monitoring module. The light source modulation module is used for providing a tunable scanning laser and a semiconductor electro-optical modulator; simultaneous measurement of multiple parameters is achieved through the fiber bragg grating, multiple independent sensors are not needed, the complexity and cost of the system are greatly reduced, the fiber bragg grating is small in size and light in weight, can be flexibly arranged in a monitoring area and is particularly suitable for occasions with limited space, and due to the fact that reflection spectrums of the fiber bragg grating are obtained at the same time, the measurement accuracy is high. Therefore, data among different parameters are synchronous, and the accuracy of a monitoring result is improved.

The invention relates to the technical field of underwater imaging, in particular to an underwater multispectral ghost imaging system based on deep learning image super-resolution reconstruction, which comprises a light modulation module, a multispectral light intensity data acquisition module and a control and image reconstruction module, the control and image reconstruction module is respectively connected with the light modulation module and the multispectral light intensity data acquisition module, the control and image reconstruction module controls the light modulation module to modulate an illumination light beam and then project the illumination light beam to a target object, and the modulated illumination light beam is reflected by the target object and then received by the multispectral light intensity data acquisition module; and the multispectral light intensity data acquisition module sends the received reflected light beam to the control and image reconstruction module, image reconstruction is performed through a pre-trained deep neural network in the control and image reconstruction module, and a super-resolution image is output. The underwater multispectral ghost imaging system is provided in combination with a deep learning image super-resolution reconstruction algorithm, and the imaging quality and resolution are improved.

The invention relates to the technical field of light detection, in particular to a light detection sensor and a light projection device and an optical module thereof, the light projection device comprises an illumination optical system, a light modulation element and a projection optical system, and the illumination optical system is configured to emit light advancing along a first preset light path; the light modulation element is configured to receive light emitted by the illumination optical system and modulate the light to generate modulated light, and the modulated light travels along a second preset light path; the projection optical system is configured to receive the modulated light and guide the modulated light to advance along a second preset light path; the projection optical system comprises a plurality of lenses, and optical axes of partial lenses in the plurality of lenses are offset by a preset offset amount relative to a main optical axis of the projection optical system. According to the invention, under the condition that a relatively small Samm angle is adopted, the misalignment amount is preset for a part of lenses in the plurality of lenses, so that the miniaturization requirement of the sensor can be met, and the light energy transmission efficiency can be improved.

The invention relates to a packaging structure and packaging method for an optical module and an optical chip, and the packaging structure comprises a receiving end assembly, a stepped metal heat sink, and a silicon-based optical interconnection assembly which is pasted on the stepped metal heat sink. The silicon-based optical interconnection assembly comprises a laser, a silicon light beam splitter, a lens group, a light transmission compensation gasket, a silicon light modulator and an optical fiber array; coplanar coupling is formed between the laser and the silicon light beam splitter. The silicon light beam splitter and at least part of the collimating lens in the lens group are fixed on the light transmission compensation gasket; the optical fiber array and the silicon light modulator realize waveguide matching in an active coupling mode; the silicon light modulator and the receiving end assembly are separately arranged at least at a preset interval, and the optical fiber array and / or the receiving end assembly are / is covered with a metal isolation cover. According to the invention, the problems of high cost of multiple light sources, easy pollution of an open light path and yield bottleneck caused by low-reliability glue in the prior art are solved, and finally, a packaging scheme which is compact in structure, stable in process and high in mass production is formed.

The invention relates to the technical field of measurement and detection, and discloses an endoscopic imaging and temperature sensing integrated system, which comprises an optical imaging and temperature measuring device, a signal detection device and a control terminal, and is characterized in that the optical imaging and temperature measuring device comprises an excitation light path module, a grating fiber module and a sample control module; the signal detection device comprises a fluorescence detection module and a spectral measurement module, and the control terminal is used for calculating a hologram according to the light field information, sending the hologram to the light modulator to enable the light modulator to carry out wavefront shaping on the first laser based on the hologram, generating a fluorescence imaging graph according to a fluorescence signal, and sending the fluorescence imaging graph to the spectral measurement module. And determining the temperature of the to-be-measured sample according to the spectral information. By utilizing the wavefront shaping technology, the influence of the Bragg grating engraved in the multimode fiber on the light spot output by the multimode fiber can be reduced, the endoscopic imaging quality is improved, and high-quality images can be obtained while the temperature is measured based on the single multimode fiber.

The invention relates to a secondary harmonic characterization system based on spatial light regulation and control. The secondary harmonic characterization system comprises an incident light path unit, a detection light path unit and a sample table, the incident light path unit sequentially comprises a laser, a polarizer, a half-wave plate, a light modulator, a long-pass optical filter and an incident objective lens in the light beam incident direction; a wafer is carried on the sample table; the detection light path unit sequentially comprises an adjustable detection objective lens, a light path adjuster, a polarization analyzer, a short-pass optical filter and a detector in the light beam reflection direction; according to the SHG signal representation detected by the detector, all control parameters of the light modulator, the adjustable detection objective lens, the light path adjuster and the sample table are regulated and controlled, and the SHG signal receiving efficiency of the detector is improved. According to the invention, it is ensured that the detector efficiently receives the SHG signal, and the SHG characterization precision is improved.

The invention belongs to the technical field of wireless optical communication, and discloses a cross-domain relay type radio frequency-laser communication module and a communication method, and the cross-domain relay type radio frequency-laser communication module is provided with a node construction module, a relay module, a synchronous control module, a modulation-demodulation module and a situation awareness module. According to the invention, a large-scale MIMO technology, DMD structure light modulation and AWI signal modulation and demodulation technology are utilized to autonomously design a large-bandwidth and high-secrecy radio-light transmission conversion module; a high-precision synchronous control module is designed by using a GD32 chip, and low-delay and low-error-code relay type cross-domain information interconnection is ensured. Meanwhile, a high-sensitivity area array CCD detector is combined to sense the position of a light spot, an underwater speckle recognition alignment algorithm is developed based on YoLoV8, azimuth information is output to assist semi-active alignment, and then low-cost, low-time-delay, high-speed, long-distance and large-capacity all-weather cross-domain communication in complex water areas is achieved.

The invention discloses a high-power picosecond pulse train laser with programmable sub-pulse energy and a method, and relates to the related technical field of lasers, the high-power picosecond pulse train laser comprises a mode-locked fiber laser, an acousto-optic modulator and a solid amplification chain which are sequentially arranged along an optical transmission path; the mode-locked fiber laser generates a mode-locked picosecond pulse sequence; the acousto-optic modulator performs pulse selection and pulse string grouping on the mode-locked picosecond pulse sequence, and performs pre-programming shaping on sub-pulse energy in a pulse string according to set intensity distribution to generate a pre-shaped pulse string; the solid amplification chain comprises at least one stage of solid amplifier, and the solid amplifier comprises a dichroscope, a laser gain crystal, a coupling optical assembly and an LD pumping source; and the dichroscope is used for focusing the pre-shaped pulse string amplified at the previous stage and the LD pump light transmitted by the coupling optical assembly into the laser gain crystal. Independent programmable regulation and control of the energy of each sub-pulse in the pulse string are realized, and the energy distribution of each sub-pulse in the pulse string can be flexibly adjusted.

The invention provides a spatial light modulator, a self-checking device thereof and a light computing device, and relates to the technical field of optical modulation.The spatial light modulator comprises an incident waveguide structure, a covering plate, a liquid crystal layer, a substrate and an emergent waveguide structure; the incident waveguide structure is optically coupled with the cover plate and is used for guiding externally incident laser into the cover plate at a preset angle; the covering plate is used for enabling laser to be propagated in the covering plate in a total reflection form; the substrate bears the liquid crystal layer, integrates the driving circuit and is used for applying regulation and control voltage to the liquid crystal layer; the liquid crystal layer is arranged on the lower side of the covering plate and used for conducting phase modulation on the laser transmitted to the liquid crystal layer in a total reflection mode in response to the regulation voltage. And the emergent waveguide structure is optically coupled with the covering plate and is used for guiding the laser modulated by the liquid crystal layer out of the covering plate to a free space. According to the spatial light modulator, efficient spatial modulation and accurate control of the light field are realized, so that the integration and function accuracy of the spatial light modulator in self-inspection and light calculation are improved.