1498 results about "Optical switch" patented technology

The invention relates to an optically controllable switching device having a first and second line section, between which an optically controllable switch (T2) is inserted, and having a sensor element (SE). The optically controllable switch (T2) disconnects or connects depending on an optical switching signal (SB), whether the switch is "on" or "off". The sensor element (SE) comprises a carrier material (TM) with crystals comprising one or more paramagnetic centers (NV). When irradiated with pump radiation (LB), the sensor element (SE) emits fluorescent radiation (FL) which depends on the magnetic flux density B at the location of the sensor element (SE). A line current (I LTG) in the first line section of the line (LTG) generates a magnetic field with a flux density B which, with sufficient current strength, influences the fluorescent radiation (FL) from one or more paramagnetic centers (NV). The optically controllable switching device has first means (LWL1, PL1, LIV) for irradiating the one or more paramagnetic centers (NV) with pump radiation (LB) and second means (LWL2, F1, PD, LIV) for detecting and separating the fluorescent radiation (FL) and for detecting a measured value signal which depends on the intensity of the fluorescent radiation (FL) and / or on the phase shift of the modulation signal of the temporal profile of the intensity of the fluorescent radiation (FL). The optically controllable switching device has third means (LIV) for generating an optical switching signal (SB) and for controlling the state of the optically controllable switch (T2) using this optical switching signal (SB).The optical switching signal (SB) depends on the intensity of the fluorescence radiation (FL) and / or on the phase shift of the modulation signal of the temporal course of the intensity of the fluorescence radiation (FL).

The invention provides a distributed optical fiber temperature detection double-end correction device and method, and belongs to the technical field of optical fiber logging, the upper end of a logging optical cable is connected with a ground reference optical fiber ring, and the lower end of the logging optical cable is connected with an optical fiber grating sensor; the electronic temperature sensor is placed in the ground reference optical fiber ring, the measurement and control module is connected with the electronic temperature sensor, and the temperature of the ground reference optical fiber ring is measured through the electronic temperature sensor; the pump light source and the DTS measurement module are connected with the COM optical splitter; the optical switch is used for switching DTS distributed optical fiber measurement and optical fiber grating sensor measurement; temperature values measured by the DTS distributed optical fiber and the optical fiber grating sensor serve as reference data to adjust measurement parameters of the DTS measurement module, and double-end correction of DTS temperature measurement data is completed. The ground reference optical fiber is combined with the electronic thermometer, and the optical fiber grating sensor is adopted underground, so that distributed optical fiber temperature measurement double-end correction is realized.

The invention relates to the technical field of hydropower engineering, and discloses a single-core self-healing type looped network networking method and system, and the method comprises the steps: dividing a whole network into a plurality of sub looped networks; each sub-ring network operates independently; the light switch in each sub-ring network adopts an A / B end connection mode; reversely connecting the B end of the last measuring point to the A end of the initial measuring station by using an optical fiber to form a closed physical structure; configuring a protocol on the switch, and controlling a data flow path through the protocol; different sub-ring networks are connected through RJ45 ports, and a CAT5E shielded twisted pair or an Ethernet interface is used; when a certain node or link fails, the protocol automatically triggers a switching mechanism; the master station optical transceiver monitors the states of all nodes in real time and displays fault points through a network management interface. The system comprises a sub-ring network module, a control data flow module and a fault point display module. The problems that a traditional networking method of hydropower engineering is poor in reliability, and self-healing cannot be achieved after an intermediate node is disconnected are successfully solved.

Described herein are a computing systems comprising a photonic interposer having an optical network comprising a plurality of waveguides and a plurality of controllable optical switches; an electronic die having a surface bonded to the photonic interposer, an inner interface comprising a first plurality of ports electrically coupling the electronic die to the photonic interposer through the surface; and an outer interface comprising a second plurality of ports electrically coupling the electronic die to the photonic interposer through the surface, wherein the outer interface at least partially encloses the inner interface.

A lighting apparatus includes a light source plate, multiple types of LED modules, a switch connector, a manual switch, a controller and a main housing. The multiple types of LED modules respectively emit lights of different parameters. The switch module is used for holding a state among multiple candidate states. The switch connector is disposed at least partially on a back side of the light source plate. The manual switch is coupled to the switch module via the switch connector to change the state. The controller is coupled to the switch module for determining a set of driving currents supplied to the multiple types of LED modules to emit a mixed light of a required parameter corresponding to the state of the switch module. a main housing for holding the light source plate. The main housing has a lateral wall.

The invention discloses a court cross-network audio and video signaling two-way interaction system and method. The system comprises a multi-protocol access adaptation module, a security isolation module and the like. The multi-protocol access adaptation module is provided with a special access adaptation unit for multiple protocols; the security isolation module realizes physical isolation through a security data exchange platform and a one-way audio and video optical shutter, and a built-in signaling security detection unit detects signaling; the signaling conversion module converts the signaling into an internal uniform format and adapts to the internal uniform format; the signaling processing module processes signaling, extracts information, schedules resources and feeds back a result; the network adaptation module adjusts transmission parameters; the identity authentication and authorization module uses multi-factor authentication and fine-grained authorization. The method comprises the steps of signaling initiating and receiving, identity authentication and authorization, multi-protocol access adaptation, signaling conversion processing and the like. The system solves the problems of cross-network communication protocol compatibility and the like, and improves the convenience and safety of judicial services.

The invention relates to the technical field of optical fiber transmission, and discloses a unidirectional optical fiber transmission system, which comprises a first optical splitter, a second optical splitter, a third optical splitter, a first optical fiber, a second optical fiber, a first filter, a second filter, a first detection module, a second detection module, an optical switching module and a control module, when the first optical splitter receives optical signals and outputs the optical signals to the first optical fiber and the second optical fiber respectively, the control module controls the optical switching module to gate the second optical splitter to receive the optical signals transmitted by the first optical fiber according to detection results of the first detection module and / or the second detection module, or controls the optical switching module to gate the second optical splitter to receive the optical signals transmitted by the second optical fiber. Gating a third optical splitter to receive the optical signal transmitted by the second optical fiber; according to the technical scheme, the misjudgment rate is effectively reduced, and the accuracy and response speed of link switching are improved.

The invention discloses a multifunctional indoor lighting system based on AI, and provides an intelligent and personalized lighting scheme. The system comprises a human body detection module, a light induction module, an emotion recognition module, a music rhythm module, a central control module, a user interaction module and a communication module. The human body detection module uses an infrared sensor, a camera or a radar to monitor personnel activities in real time and automatically control a light switch. The light sensing module dynamically adjusts the brightness through a photosensitive sensor to ensure optimal illumination; the emotion recognition module analyzes emotion in combination with a camera and an AI algorithm, and automatically adjusts the color and brightness of light; the music rhythm module captures music rhythms through a microphone, so that light changes along with the music rhythms, and atmosphere is created. The central control module integrates sensor data, and utilizes an AI algorithm to accurately adjust the light effect. A user can set a personalized scene through a smart phone APP, a voice assistant or a touch panel. And the communication module adopts a Wi-Fi or 2.4 G wireless technology to realize equipment interconnection and remote control. The system has the advantages of intelligent control, energy conservation, environmental protection, multifunctional integration and the like, is widely suitable for families, offices and entertainment venues, and improves the lighting experience.

The invention discloses a communication method between graphics processors, a product, equipment and a medium, relates to the technical field of high-performance calculation and artificial intelligence acceleration, and is applied to a stand-alone system comprising a plurality of graphics processors and a central photoelectric hybrid switching chip constructed based on interconnection of an electric switching matrix and an optical switching matrix. The graphics processor is connected with the central photoelectric hybrid switching chip through an optical link and an electric link; the method comprises the following steps: performing data classification on to-be-transmitted data of a source graphics processor; if the to-be-transmitted data is a control flow, the source graphics processor is controlled to send the to-be-transmitted data to an electric switching matrix through an electric link, and then the to-be-transmitted data is routed to a target graphics processor in the graphics processors; and if the to-be-transmitted data is a data stream, the source graphics processor is controlled to send the to-be-transmitted data to the optical switching matrix through the optical link, and then the to-be-transmitted data is routed to the target graphics processor. Interconnection between graphics processors is optimized to improve communication efficiency between graphics processors.

The present invention provides a semiconductor apparatus achieving interconnection by using an on-chip all-optical switching network module and a manufacturing method therefor. The semiconductor apparatus comprises: a circuit board, which has a plurality of electrical connection paths; an on-chip all-optical switching network module, which is disposed on the circuit board, the on-chip all-optical switching network module comprising a photonic chip and a plurality of analog electrical chips for transceiving which are arranged above the photonic chip, the photonic chip comprising a plurality of communication nodes, a plurality of optical connection paths, and at least one on-chip optical switch which are in corresponding communication connection with the plurality of analog electrical chips for transceiving, and the on-chip optical switch being configured to alter the connection topology among the plurality of communication nodes; and a plurality of computing modules, which are arranged on the circuit board and, by means of the electrical connection paths on the circuit board, are in corresponding communication connection with the plurality of analog electrical chips for transceiving of the on-chip all-optical switching network module, so that the connection topology among the plurality of computing modules can be altered by the on-chip optical switch.

The invention discloses a transformer body fault comprehensive monitoring system and method based on optical fiber sensing, and belongs to the technical field of transformer monitoring. The transformer body fault comprehensive monitoring system comprises a self-compensation type optical fiber sensing module, a multi-path optical fiber penetrating device, an optical fiber signal demodulation analysis device, an optical switch and a fault monitoring host; the self-compensating optical fiber sensing module comprises a main sensing unit group and a reference sensing unit group, the main sensing unit group is used for monitoring temperature, stress, gas, partial discharge and vibration signals of the transformer, and the reference sensing unit group is deployed in a non-monitoring area outside the transformer; the main sensing unit group and the main sensing unit group form a differential measurement pair to generate a net signal for eliminating environmental interference; the fault monitoring host comprises a multi-parameter dynamic correlation analysis module and an abnormal mode identification module, and is used for carrying out correlation analysis on monitoring data of different sensing units, identifying abnormal signals, carrying out real-time comparison on the abnormal signals based on a correlation analysis result, and determining an abnormal type and a fault position of the transformer.

Various optical systems for use in a light pulse atomic interferometer (LPAI)-based one-, two-, or three-axis accelerometer or gyroscope are disclosed. As an LPAI accelerometer or gyroscope may employ many different laser beams to implement the LPAI functionality, ways of combining these different laser beams to thereby simplify the optical systems are desired. The cooling laser beam portion of the optical system may be simplified using one or more reflective grating chips. The Raman laser beam optics may be simplified using combiners and separators. For LPAI systems sensing along three axes, various optical switching schemes may be employed, including ones that generate variable data-rates with a primary sensing axis having a higher data-rate than the secondary sensing axes. Further, by combining various laser beams in a time-multiplexed manner, the number of optical fiber tethers to a sensor head may be reduced.

The invention discloses an on-chip optical interconnection and switching chip and an application system thereof. Wherein the on-chip optical interconnection and exchange chip is integrated by a power divider, a bidirectional optical transceiver unit and an optical switch unit; the application system of the on-chip optical interconnection and switching chip comprises a multi-wavelength light source used for generating multi-wavelength optical carrier signals, a transceiving unit control and clock module used for bidirectional transceiving unit feedback / amplifier control and clock synchronization, and an optical switching control module used for switching an optical switching unit switching link. The chips and the modules are used for realizing optical interconnection and optical switching of the special electrical computing chip ASIC. According to the invention, bidirectional optical interconnection and exchange of special computing electric chips such as a CPU, a GPU, a DPU and the like can be realized by utilizing an on-chip optical interconnection and exchange technology, the interconnection rate is high, the exchange switching time is short, computing power cluster networking oriented to artificial intelligence application can be supported, and the application prospect is good.

The invention relates to the technical field of biological microscopic imaging, and discloses a deconvolution super-resolution imaging method and device based on deep learning denoising and a medium. The method comprises the following steps: acquiring a to-be-denoised image of a to-be-imaged structure marked by fluorescent molecules; de-noising the image to be de-noised by using a preset image de-noising neural network to obtain a de-noised image; a training data set for training the network is generated by utilizing the optical switch characteristics of optical switch fluorescent molecules, and the optical switch fluorescent molecules are used for marking to-be-imaged structures of samples in the training data set; the emission spectrum of the fluorescent molecules is overlapped with the emission spectrum of the fluorescent molecules of the optical switch; and carrying out deconvolution processing on the denoised image to obtain a super-resolution imaging image. According to the invention, the large-scale and high-quality true value image is obtained by using the optical switch characteristic of the optical switch fluorescent molecules, and the denoising effect of the image denoising neural network is improved; and denoising the image by using the network, and then carrying out deconvolution on the denoised image to realize large-view living cell single-frame super-resolution imaging.

The invention provides a network topology configuration method, a communication system and related equipment, and the method comprises the steps: enabling a network controller to analyze a training task before an AI model starts distributed training, determining the traffic demand information of the training task, and transmitting the traffic demand information to the AI model; the traffic demand information comprises bandwidth demand quantity among different processors in a training process of an AI training task, network topology information of the photoelectric hybrid networking can be determined based on the traffic demand information, and then configuration information of the optical switching equipment is generated based on the network topology information. According to the invention, the configuration information of the optical switching equipment is acquired, so that the optical switching equipment can perform link switching based on the configuration information to complete topology reconstruction of photoelectric hybrid networking, the network controller can actively perform flow planning before AI model training, and the problem of long network delay caused by slow link switching speed of the optical switching equipment in the training process can be avoided.

The invention discloses a multi-photon optical fiber array endoscopic imaging device and method based on hollow spiral scanning, and belongs to the technical field of biological imaging. The device comprises a laser collimation and beam expansion module, a pulse chirp module, a light beam switching module, an endoscopic detection module and a fluorescence acquisition module. The light beam switching module comprises an optical switch and an optical fiber array composed of at least two low-group-velocity dispersion single-mode optical fibers. The endoscopic detection module drives the optical fiber array to execute hollow spiral scanning through the resonance driver, the track starting point is not located at the view field original point, and central dense sampling is avoided. According to the method, the optical fibers are switched through the optical switch, so that the optical fibers execute spatial non-coincident hollow spiral scanning, multi-photon signals such as fluorescence, second harmonic and fluorescence lifetime are acquired, a central hole is complemented through image reconstruction and fusion, and a complete field imaging result is obtained. Light damage of the central area is remarkably reduced, the imaging resolution uniformity is improved, the fused image is true and reliable based on physical sampling, and the system stability is high.

The invention discloses an 8 * 8 lithium niobate array optical switch, and belongs to the technical field of integrated photon and optical communication. Comprising twenty switch units of Mach-Zehnder interferometer structures, and each switch unit is provided with a modulation arm composed of an upper bent waveguide and a lower bent waveguide and is provided with a push-pull type loading electrode. The switch units are combined in a multi-stage array mode and are connected through crossed waveguides, and the 8 * 8 array non-blocking optical switch is formed by using twenty switch units. According to the invention, the 2 * 2 optical switch units with small size and high modulation efficiency are designed, the transverse size of a modulation arm is shortened by adopting upper and lower bent waveguides, the driving voltage is reduced by combining a push-pull electrode loading technology, and finally the high-density 8 * 8 array optical switch is constructed by twenty units. By utilizing the electro-optical effect of lithium niobate, through the optimization of a bent waveguide structure and the driving of a push-pull electrode, low-power-consumption and high-speed optical path switching is realized, and a high-integration-level routing solution is provided for a high-speed optical communication system.

The invention discloses an OEO amplifier with a high-speed hard switching function and an optical transmission system, and relates to the technical field of optical amplifiers, the OEO amplifier comprises three magneto-optical switches, an optical splitter group, a photoelectric detector group, a real-time comparison circuit, a logic gate control circuit and a driving circuit; the photoelectric detector group collects optical signal power to generate an electric signal; the real-time comparison circuit performs voltage threshold judgment on the electric signal; the logic gate control circuit is connected with the output end of the real-time comparison circuit so as to synchronously control the switching states of the three magneto-optical switches according to a voltage threshold judgment result; the driving circuit is used for driving the magneto-optical switch to synchronously execute a switching action; when the OEO amplifier detects that optical signals in any direction are interrupted, all the magneto-optical switches finish synchronous switching within 100 microseconds, and the end-to-end optical signal switching time difference is smaller than 2 picoseconds. The method is suitable for a single-fiber bidirectional optical communication environment requiring high frequency, high precision and high stability.

The invention discloses a parameter measuring device and method of an optical switch and optical communication equipment, and relates to the technical field of optical switch measurement, and the parameter measuring device of the optical switch comprises an optical path module, a signal conditioning circuit, a driving module, a signal acquisition module and an upper computer. The optical path module converts the optical signal into a current signal; the signal conditioning circuit conditions the signal into a voltage signal and amplifies the voltage signal; the driving module provides a driving signal and a synchronous triggering signal; the signal acquisition module acquires a voltage signal based on the trigger signal; the upper computer calculates performance parameters of the optical switch according to the voltage signals acquired for multiple times, wherein the performance parameters at least comprise two items of insertion loss, extinction ratio, switching time and the like; according to the technical scheme, one-key measurement of performance parameters such as insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss and repeatability of the optical switch can be realized, meanwhile, the measurement cost of the optical switch is reduced, and the test efficiency and accuracy are improved.

The invention discloses an on-line monitoring multi-main-path power optical fiber automatic switching protection system and method, and belongs to the technical field of optical fiber monitoring and diagnosis, and the system comprises a main control module, an OTDR module, an optical switch module, and a routing and Ethernet module. Wherein the OTDR module monitors optical terminal equipment in real time to obtain optical fiber communication data; the main control module processes the optical fiber communication data by adopting an FPGA (Field Programmable Gate Array), compares the processed data with a preset threshold value and generates a switching decision instruction and alarm information; the routing and Ethernet module uploads the real-time state data of the optical fiber to an upper computer; receiving and responding to the alarm information; a switching instruction generated by the FPGA is issued to the optical switch module; and the optical switch module responds to the switching decision instruction generated by the main control module and executes physical channel switching of multiple paths of optical fibers. According to the invention, stable execution of data transmission and data processing can be ensured, and the stability and rationality of optical fiber automatic switching protection are improved.

Systems, devices, and methods are provided for built-in redundancy in optical devices that output an optical signal, for example, to photonic integrated circuits. The device and systems disclosed herein include a plurality of optical sources coupled to a plurality of waveguides. Each adjacent pair of the plurality of waveguides are coupled to an optical switching devices that comprises an interferometer having a first branch comprising a phase-shift mechanism coupled to one waveguide of the pair of waveguides. A voltage bias can be applied to the phase-shift mechanisms to tune a respective phase difference and direct an optical signal from any of the plurality of optical sources to the output end of the optical device. According to various examples disclosed herein, the phase-shift mechanisms comprises metal oxide semiconductor (MOS) capacitors.

The invention discloses a multi-target three-dimensional measurement device and method based on a double-optical-comb femtosecond laser radar, and relates to the field of femtosecond laser measurement, and the device comprises a double-optical-comb laser source, a single-detector time-sharing switching receiving module, a beam splitting and optical switch module and a scanning galvanometer module which are connected in sequence, and further comprises a single-detector time-sharing switching receiving module, a beam splitting and optical switch module and a scanning galvanometer module which are connected in sequence. The signal control processing module is connected with the single-detector time-sharing switching receiving module, generates a reference pulse signal and a target pulse signal based on the above modules, carries out distance calculation according to the reference pulse signal and the target pulse signal of each target light path, determines a to-be-measured distance of a target object, and sends the to-be-measured distance to the single-detector time-sharing switching receiving module; and performing three-dimensional reconstruction on the target object according to the to-be-measured distance of the target object and the angle information of the scanning galvanometer, and generating a point cloud or a three-dimensional profile diagram of the target object in the current scene, so that the system implementation difficulty and the measurement error can be reduced.

The invention relates to the technical field of optical switches, in particular to a large-scale high-power high-speed optical switch based on a silicon-on-silicon nitride platform, which comprises a first silicon nitride waveguide, a second silicon nitride waveguide, a first optical path distribution unit and a second optical path distribution unit, the first optical path distribution unit is used for correspondingly distributing a first input optical signal into N paths of first output optical signals; the second silicon nitride waveguide is correspondingly provided with N paths of input ports; the first ends and the second ends of the N silicon waveguides are respectively connected with the output port of the first silicon nitride waveguide and the input port of the second silicon nitride waveguide; a first conversion area and a second conversion area are arranged at the joint of the silicon waveguide and the first silicon nitride waveguide and the joint of the silicon waveguide and the second silicon nitride waveguide respectively, and the corresponding conversion areas are used for achieving conversion transmission of optical signals on different waveguides. The problem that an existing optical switch is difficult to bear high power is solved.

The invention relates to a thin film electro-optical crystal-silicon nitride heterogeneous integrated N * N high-speed optical switch array and a preparation method thereof. The thin film electro-optical crystal-silicon nitride heterogeneous integrated N * N high-speed optical switch array is formed by connecting 1 * 2 or 2 * 2 Mach-Zehnder high-speed optical switch units according to a certain topological structure. Wherein the high-speed optical switch unit is composed of a silicon nitride passive waveguide and a thin-film electro-optical crystal / silicon nitride heterogeneous integrated phase shift region. Comprising but not limited to thin-film lithium niobate, thin-film lithium tantalate, barium titanate and lead zirconate titanate is integrated above the silicon nitride phase shifting arm through a micro transfer printing method to form a heterogeneous integrated phase shifting region. The large-scale high-speed optical switch array with excellent performance is realized by combining the characteristics of ultra-low loss, CMOS compatibility, thermal stability and the like of a silicon nitride material, the characteristics of low power consumption, low loss, high-speed modulation and the like of a thin film electro-optical crystal and the advantages of high flexibility, parallel integration, low cost, low loss and the like of a micro transfer printing method.

The invention relates to a non-intrusive monitoring electric power optical fiber abnormity identification and positioning method and system, and the method comprises the following steps: enabling an optical fiber to generate leakage light through a clamping coupler, converting a leakage light signal into an electric signal through a photoelectric detector, converting the photoelectric signal into a digital signal through an analog-to-digital converter, and transmitting the digital signal to a processor; when the digital signal has fluctuation greater than a preset value, marking the optical fiber line as an abnormal line; the optical fiber measurement module is communicated with the abnormal optical fiber line through the optical switch switching module, and a backward Rayleigh scattering signal in the abnormal line is measured; carrying out noise reduction on a back Rayleigh scattering signal in the abnormal line by using wavelet transform; performing abnormal point positioning according to a mutation point on the backward Rayleigh scattering signal after noise reduction, and identifying an abnormal type through a support vector machine model optimized by a grey wolf algorithm; and merging the abnormal points and the abnormal types in the optical fiber line, transmitting the merged abnormal points and abnormal types to a cloud through a data transmission port, and sending out an optical fiber line abnormal early warning.

An optical switch comprising: a set of first input ports. each first input port configured to transport an optical signal having at least one component frequency channel: a set of first output ports. each first output port configured to transport an optical signal having at least one component frequency channel: a first programmable deflection plane configured to deflect beams incident on it to form a first deflected array of beams: a second programmable deflection plane configured to deflect beams incident on it to form a second deflected array of beams: a first demultiplexer configured to separate light from the set of first input ports into its component frequency channels to form the beams incident on the first programmable deflection plane: a first multiplexer configured to combine the second deflected array of beams from the second programmable deflection plane into combined signals incident on the set of first output ports: and a beam steering optical element group configured to transfer the first deflected array of beams from the first programmable deflection plane to the beams incident on the second programmable deflection plane. The incidence normal of the first programmable

The invention discloses intelligent bolt fastening equipment which comprises a fixing mechanism, a translation mechanism, a shifting mechanism, a wrench floating mechanism, a wrench assembly, a sleeve measuring device and an optical switch assembly. Wherein the fixing mechanism is used for fixing the whole bolt fastening equipment on a device to be fastened; the translation mechanism is fixed on the fixing mechanism, the turning mechanism is fixed on the translation mechanism, the wrench floating mechanism and the sleeve measuring device are fixed on the turning mechanism, the wrench assembly penetrates through the wrench floating mechanism and the turning mechanism, and the sleeve measuring device measures whether a bolt sleeve at the tail end of the wrench assembly is matched with a to-be-fastened bolt or not; the translation mechanism drives the turning mechanism, the wrench floating mechanism, the wrench assembly and the sleeve measuring device to move up and down, and the optical switch assembly triggers and measures the displacement of the up-and-down movement. The bolt fastening device is wide in application range, high in bolt fastening precision and accuracy and long in service life.

The invention provides a Schiff base optical switch material, the molecular structural formula of which is at least one of the following: # imgabs0. The Schiff base optical switch material has the advantages that the voxel generation and disappearance speeds are both smaller than the limit resolution of human eyes, the response speed is high, and the dynamic refreshing of a three-dimensional image can be realized. Under independent excitation of ultraviolet light or visible light, the luminous intensity of the Schiff base photoswitch material is low, the luminous intensity at the intersection point of the ultraviolet light and the visible light is high, and a formed three-dimensional image is high in brightness and high in contrast ratio. The Schiff base photoswitch material can still be stably switched on and off under multiple excitation of ultraviolet light and visible light, and is good in fatigue resistance and high in stability. The invention also provides a preparation method of the Schiff base optical switch material and a static body three-dimensional display system comprising the Schiff base optical switch material.

The invention relates to the technical field of light quantum metering, in particular to a multifunctional standard single photon source generation and calibration device and a use method, and the device comprises a pumping laser light source, a nonlinear crystal, a signal optical filter, a beam splitter, a temperature control module, an idler frequency optical filter, a control module, a single photon detector group, a beam splitter, a multi-channel coincidence counter, and an optical switch. The pumping laser light source pumps the nonlinear crystal to generate two paths of single photon output of signal light and idler frequency light, the two paths of single photon output are filtered by the filter and then divided into multiple paths by the beam splitter, and standard single photons are directly output or the paths of the signal light or the idler frequency light are controlled by the optical switch to enter the single photon detector group for detection. External input single photons are controlled by the optical switch to enter the single-photon detector group for detection, and a count value of the single-photon detector group is accessed to the multichannel coincidence counter to record data. A pump light stable power system and a multi-path beam splitting coincidence counting system are introduced into a light path, so that standard single photon output with known brightness and g (2) (0) value can be realized.

A light detection and ranging (LIDAR) transceiver includes optical antenna arrays and an optical switch. Some of the optical antenna arrays include a number of optical antennas and an optical splitter coupled to the optical antennas. The optical splitter may include a number of passive optical splitters. The optical splitter provides a portion of an input signal to the optical antennas. The optical switch is configured to selectively provide the input signal to at least one of the plurality of optical antenna arrays. The optical switch enables addressable field of view scanning by selectively providing the input signal to the plurality of antenna arrays, one array at a time.