302 results about "Optical link" patented technology

The invention relates to the technical field of underwater communication and positioning, in particular to a multi-mode underwater wireless communication system based on dynamic link calibration, which integrates underwater acoustic positioning guide, attitude adaptive tracking control, optical link enhancement and an error code correction mechanism. Comprising a central control core, an acoustic communication unit, an optical communication transmitting unit, an optical signal receiving unit, an optical control unit, a multi-axis attitude adjusting unit, a data fusion and verification processing unit and a high-speed modulation-demodulation and error code correction unit. And by using a double-shaft servo motor and automatic gain control, real-time target tracking and accurate alignment of optical signals are realized, FPGA and OFDM modulation are combined to optimize data throughput, and a data cross validation mechanism is introduced to correct error codes, so that the data integrity is improved.

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 invention discloses an on-chip time-frequency transmission system and method based on an octave optical comb and an electro-optical modulation optical comb, and the method comprises the steps: constructing a chip-based optical reference cavity through the technologies of vacuum optical cement, photoresist backflow and the like, and achieving an on-chip ultra-stable laser through a phase modulator and a reflection separation optical path; an on-chip laser source pumping micro-ring resonant cavity is utilized to generate an octave optical frequency comb, frequency multiplication is carried out on the on-chip laser source pumping micro-ring resonant cavity and an additional laser source to realize detection and locking of carrier envelope offset frequency (fceo), frequency beating is carried out on the on-chip laser source pumping micro-ring resonant cavity and the on-chip ultra-stable laser device to realize frequency beating (fbeam) locking, and the laser source is utilized to generate an electro-optical modulation optical frequency comb through a circulating phase modulator to realize frequency beating and locking of the on-chip ultra-stable laser device. And the optical time frequency is locked with the locked octave optical comb, is sent to a far end after polarization control and light amplification, and simultaneously receives an electro-optical modulation optical comb at the far end and performs linear light sampling, so that the transmission of the optical time frequency is realized. The optical fiber or space optical link time-frequency transmission device can realize optical fiber or space optical link time-frequency transmission, and has the advantages of low overall noise, high transmission precision, compact structure, small size, low power consumption and the like.

The invention relates to an automatic test method of an FTTR optical link, which comprises the following steps: acquiring specified parameters of the FTTR optical link to be detected, establishing communication connection between a test control center and FTTR equipment, dynamically generating an optical link test instruction and sending the optical link test instruction to the FTTR equipment, and testing the optical link according to the received optical link test instruction. The test control center performs comparative analysis on the received test data and preset standard data, inputs the test data into a machine learning model for training and updating, judges whether the optical link has a fault based on a comparative analysis result and a prediction result, and marks a fault type and a fault position by using a fault positioning algorithm if the optical link has the fault; and generating a test report based on the comparative analysis result, the fault judgment result, the fault type and the fault position, and automatically generating a fault solution according to the fault type. According to the method, automatic and intelligent testing of the FTTR optical link is realized, and the fault diagnosis efficiency and accuracy are improved.

A radio system includes a feed network, an edge wavelength switching system (EWSS), a photodetector, and a broadband lens-based antenna subsystem. The feed network aggregates a plurality of unmodulated optical carriers and modulated optical carriers for delivery to an optical link. The EWSS receives the plurality of unmodulated optical carriers and modulated optical carriers from the optical link, and selects a first unmodulated carrier and a first modulated carrier as a first selected optical carrier pair. The photodetector receives the first selected carrier pair from the EWSS and generates a first electrical signal from an optical beat of the first unmodulated carrier with the first modulated carrier. The broadband lens-based antenna subsystem receives the first electrical signal from the photodetector, propagates the received first electrical signal through a lens body, and outputs a first directional wireless beam signal containing signal data from the first modulated carrier.

The invention relates to the technical field of distributed data synchronization, in particular to a three-terminal message synchronization method, which comprises the following steps of: generating FALCON public and private keys for three terminals respectively, negotiating a two-threshold threshold public key, writing a message key hash with a vector clock into a multi-branch Verkle tree, and updating a root abstract; a sending end carries out integrity proof broadcasting through a Bloom bitmap, a compression model, a root abstract and zero knowledge; a receiving end compares the bitmaps to obtain a difference set, and a coding window, a redundancy proportion and power distribution are obtained through reinforcement learning; a sending end uses sparse Fountain coding to send difference set packets in wireless and optical links in a shunting manner; a receiving end carries out linear solution decoding, verification and certification, batch box opening, supplementary signing aggregation and root abstract refreshing; and the completion rate and the link quality are continuously written, and self-adaptive operation is carried out in offline, alternating or low-power scenes. The method has the advantages of quantum security, low bandwidth, low time delay and energy conservation, and transaction omission and data conflict can be avoided.

The invention discloses an acoustic optical communication positioning method for an autonomous adjustment channel of an underwater robot, and the method comprises the steps: constructing an underwater dynamic acousto-optic fusion repeater, achieving the wide-area guaranteed-bottom connection with the underwater robot through an acoustic link, and providing meter-scale precision coarse positioning covering a whole operation region; the method provides prior information for rapid establishment of a subsequent optical link, further dynamically compresses an optical search area to realize rapid and accurate link establishment, and performs autonomous and smooth switching among acoustic, optical and acousto-optic hybrid transmission modes according to real-time link quality assessment (signal-to-noise ratio), thereby realizing acousto-optic deep coupling and cooperative scheduling, and improving the reliability of the system. The system has the advantages of long-distance reliable connection, short-distance high-speed data return, high-precision positioning and the like, and solves the core technical problems that the distance and the speed cannot be obtained at the same time and the positioning precision and the coverage range are mutually restricted in the prior art.

The invention discloses an automatic remote control method and system for a port machine, and relates to the technical field of automation, and the method comprises the steps: front-end processing equipment is connected with a lifting appliance positioning sensor and a motor driver, generates an equipment topological graph, is connected with a plurality of port machine PLC networks through a Profibus-DP coupler, and outputs a network state report; meanwhile, a dual-redundancy operation platform interface is configured and a state identification signal is output; based on the state identification signal, constructing an all-optical link and generating an optical fiber path topology, performing layered transmission on a lifting appliance control instruction and a path instruction, establishing a heartbeat detection mechanism and triggering a state confirmation signal; receiving a state confirmation signal and the wavelength allocation table, and acquiring laser radar point cloud data through a dedicated channel to execute lifting appliance obstacle avoidance correction; and based on the operation control authority and the new optimal path sequence, constructing a digital twin, and generating a scheduling report through an LSTM model. According to the method, the special channel and the shared channel are constructed, so that instruction blocking is eliminated.

Methods and systems for operation of an endpoint device of a deployment are disclosed. The endpoint device may obtain a network data united directed to a destination. The endpoint device may select a channel over which to forward the network data united based on a forwarding policy and a state of an optical link between the endpoint device and an optical service point. The forwarding policy may be keyed, at least in part, on the state of the optical link. The endpoint device may forward the network data unit over the selected channel to direct the network data unit towards the destination in order to facilitate provisioning of desired computer-implemented services.

The invention discloses a power distribution estimation method for optical performance monitoring of an optical communication system, and relates to the technical field of optical communication. A received signal is preprocessed to generate a complex value signal, the complex value signal is divided into two paths of signals, one path of signals is subjected to standard digital signal processing, the other path of signals is subjected to partial dispersion compensation, nonlinear compensation and residual dispersion compensation after dispersion reloading, absolute values of the two paths of signals are taken for related processing, and power is obtained; a power distribution diagram is obtained after repeated processing for n times, links of the power distribution diagram are changed, insertion losses are added to different link sections, then power is obtained by repeating the calculation method, multiple power distribution diagrams are obtained after repeated processing for n times, and all obtained power distribution diagram data are input into a deep neural network to train and recognize abnormal power distribution; according to the power distribution estimation method for optical performance monitoring of the optical communication system, the nonlinear Kerr effect of the optical fiber is utilized for longitudinal monitoring, and power distribution of multiple cross optical links is measured.

The invention discloses a test system and method for an optical engine module, an evaluation board, a storage medium and a product, and relates to the technical field of communication, and the system comprises the steps: carrying out the active test and passive test of a to-be-tested transmission link which is disposed between a switching assembly and a first connector and is adjustable in electrical interconnection parameter, covering an electrical-optical full link, and carrying out the passive test of the to-be-tested transmission link; active testing is carried out on a to-be-tested transmission link under current electrical interconnection parameters through the switching component to locate a performance critical value, passive performance parameters of a target to-be-tested transmission link under a critical state are measured through the testing component, a critical failure state is accurately associated with physical layer defects, design allowance is conveniently deduced in a reverse mode, and the performance of the to-be-tested transmission link is accurately determined. The interconnection design parameters of the optical engine module are determined based on the parameters, compatibility is improved, the problems of fuzzy performance boundary, unknown design margin and compatibility risk caused by lack of systematic testing in related technologies are solved, and the beneficial effect of providing quantifiable design basis for PCIe optical interconnection channels is achieved.

A method for configuring an optical transmitter for transmitting optical signals over a passive optical link. The method includes using a digital processor to generate a target constellation probability distribution (CPD) for a probabilistic constellation encoder (PCE) of the optical transmitter. The target CPD is generated using a system performance optimization algorithm accounting for the transmitter peak power constraint and a peak enhancement property of a drive circuit of the optical transmitter.

The invention provides a graph data communication intensity mapping method and system based on optical transport network topology. According to the method, an adjacent matrix is established by extracting graph data structure information, vertex centrality and a clustering coefficient are calculated, and a graph data communication feature matrix is generated; oTN network equipment information and optical link topology are collected, link parameters and wavelength resource states are measured, and an OTN physical network feature matrix is obtained; establishing a double-layer mapping relation matrix through a resource mapping algorithm; integrating the communication frequency, the time delay sensitivity, the bandwidth requirement, the wavelength resource and the topological matching degree, and calculating a communication strength weight matrix; generating a candidate layout scheme, performing multi-dimensional evaluation, and determining an optimized data layout scheme; and dynamically adjusting the mapping relation by adopting an incremental updating algorithm. According to the invention, the efficient collaboration of the graph computing task and the optical transport network resource is realized, and the performance and resource utilization efficiency of the distributed graph computing system are obviously improved.

The invention provides an SDH / PDH payload real-time bandwidth analysis method based on time synchronization, and relates to the technical field of transmission networks, and the method comprises the steps: obtaining the network state information of each network working node in an optical transmission network; preprocessing the original data frame set to obtain an average effective load corresponding to each data frame in the data frame set, and calculating an effective load dynamic estimation value based on the average effective load and a historical average effective load; obtaining a network transmission resource allocation strategy of an optical link between any two adjacent network working nodes and a network transmission resource parameter corresponding to the network transmission resource allocation strategy according to a preset constraint condition and the effective load dynamic estimation value; and obtaining a comprehensive evaluation index of the current data frame according to the network transmission resource parameter and the load bandwidth performance function, and adjusting a flow distribution path of the optical transmission network according to the comprehensive evaluation index. According to the invention, the dynamic self-adaptive adjustment of the network flow can be realized.

The application discloses a kind of photonic tensor convolution calculation method and system for multi-channel data processing.The system includes multi-wavelength light source, high-speed modulator, signal generating unit, weighting unit, delay unit, balanced photodetector and signal processing unit, and the multi-channel tensor reconstruction algorithm of input signal.By improving the vectorization rule of tensor data, the elements of different channels in high-order tensor are rearranged into a one-dimensional vector.Based on the technology of three-dimensional multiplexing of time, space and frequency, only one modulator and a set of signal generating unit are needed to realize the convolution calculation of single optical link with arbitrary multi-channel tensor data simultaneously.The sliding convolution of multi-channel data can be directly completed in one calculation, which can release more physical hardware resources for multi-tensor parallel operation, complete more concise and efficient photonic tensor convolution operation, and greatly increase the integration and scalability of the scheme.

The embodiment of the invention provides an orbit-based laser link dynamic capturing, tracking and establishing ground verification device and method, and relates to the technical field of satellite communication, the device comprises a laser platform, a two-dimensional turntable, a turntable controller, a laser terminal and a terminal ground detector, and the laser terminal is mounted on the two-dimensional turntable; the laser platform comprises a collimator and a control computer; the collimator provides a far-field environment for inter-satellite laser link light beams; the control computer sends track data to the terminal ground detector and the turntable controller; the turntable controller calculates the target control quantity of the two-dimensional turntable by using the track data, and drives the two-dimensional turntable to rotate to a position corresponding to the target control quantity; the terminal ground detector broadcasts track data to the laser terminal; and the laser terminal calculates an inter-satellite pointing vector by using the orbit data, drives a light beam emitted by the laser terminal to point to an opposite end according to the inter-satellite pointing vector, and emits the light beam to the opposite end. According to the scheme, the inter-satellite capturing and tracking link establishment capability of the laser terminal and the laser link stability can be fully verified.

The invention discloses a satellite-ground laser communication short window gamma-gamma turbulence parameter prediction method, and belongs to the technical field of satellite-ground laser communication and atmospheric turbulence channel parameter prediction. According to the method, aiming at the problems of strong dependence on a long observation window, great deterioration of prediction precision under a short window scene and insufficient robustness under a low signal-to-noise ratio condition in a traditional method, a satellite-to-ground optical link short window observation model and a gamma-gamma channel statistical model are established, short window training data with time correlation are constructed, and a satellite-to-ground optical link short window prediction model is established. And designing a short-window gamma-gamma network, extracting time domain features through a convolution trunk, realizing parameter joint prediction under physical constraints in combination with a flicker index physical regularization auxiliary head, and outputting a gamma-gamma distribution parameter prediction value. According to the method, parameter prediction with relatively high precision and relatively good stability can be realized under the conditions of a short observation window and a low signal-to-noise ratio, and the method can be used for turbulent channel state characterization of a satellite-ground laser communication receiving end.

This invention proposes a time-synchronized real-time bandwidth analysis method for SDH / PDH payloads, relating to the field of transmission network technology. The method includes: acquiring network status information of each network working node in the optical transmission network; preprocessing the original data frame set to obtain the average payload corresponding to each data frame, and calculating a dynamic estimate of the payload based on the average payload and historical average payloads; obtaining the network transmission resource allocation strategy for the optical link between any two adjacent network working nodes and the corresponding network transmission resource parameters according to preset constraints and the dynamic payload estimate; obtaining a comprehensive evaluation index for the current data frame based on the network transmission resource parameters and the payload bandwidth performance function, and adjusting the traffic allocation path of the optical transmission network according to the comprehensive evaluation index. This invention helps to achieve dynamic adaptive adjustment of network traffic.

The invention provides an optical link fault detection method and device, a first optical module and a controller, and the method comprises the steps: obtaining the index data of the first optical module, determining the first feature data according to the data of a plurality of channels, and determining the fault type of a first optical link according to the first feature data. Wherein the first optical module is connected with the first end of the optical fiber through the first interface, and the second end of the optical fiber is connected with the second optical module through the second interface; the optical fiber comprises a plurality of optical fiber cores, the plurality of optical fiber cores correspond to the plurality of channels, and the index data comprises data of the plurality of channels; the first feature data is used for representing the discrete degree among the data of the plurality of channels; the first optical link comprises a first optical module, a first interface, an optical fiber, a second interface and a second optical module. According to the method, the fault type of the optical link can be efficiently detected by analyzing the discrete degree between the data of each channel.

Techniques are described for implementing free space optical (FSO) ground-to-satellite communications. In general, an optical ground station communicates optically with a satellite via a ground-to-satellite FSO communication link. Embodiments described herein deploy at least two FSO relays at one or more aerial platform altitudes to effectively segment the ground-to-satellite FSO communication link into three or more FSO sub-links. Each FSO sub-link has better optical link performance (e.g., lower outage probability) than a single direct link. The FSO relays can include tropospheric FSO relays on low-altitude platforms and / or stratospheric FSO relays on high-altitude platforms, and architectures can use the FSO relays in a serial and / or parallel manner.

A node for a multi-plane optical network is optically connectable, for each node of at least two other nodes of the multi-plane optical network through respectively two or more optical links to the other node. The node includes one or more wavelength selective switches (WSSs) having a set of ports. The node receives, with a port, an optical signal from an optical link of a first other node. The one or more WSSs provide at least a frequency sub-band of the optical signal from the port through another port to another optical link of the first other node or a second other node. The optical link and the another optical link are associated with one plane and one other plane of the multi-plane optical network, respectively.

The invention relates to the technical field of optical fiber communication, and discloses a fault positioning device and method for a passive optical network, the device mainly comprises an optical link terminal, an optical distribution network and an optical network unit, the optical link terminal comprises a communication light generation unit, a detection light generation unit, a first wavelength division multiplexer and a fault positioning unit, the optical distribution network comprises a second wavelength division multiplexer, a first optical splitter, a second optical splitter, a plurality of optical encoders and a plurality of third wavelength division multiplexers, the second wavelength division multiplexer is used for separating the mixed light into communication optical signals and detection optical signals, and the first optical splitter is used for distributing the communication optical signals; a plurality of output ends of the second optical splitter are respectively connected to input ends of a plurality of optical encoders, each optical encoder performs time domain encoding on the detection optical signal, and an output end of each optical encoder is connected with a second input end of the third wavelength division multiplexer. According to the invention, high-efficiency, accurate and intelligent positioning of the high-splitting-ratio passive optical network fault is realized.

The invention provides an optical fiber connector, an optical fiber adapter, an optical fiber connection assembly, an optical backboard and a system, which are used for improving the detection precision of link information of an optical link by a detection device. By introducing optical elements for transmitting data signals and detection signals with different reflectivity into the optical fiber connector and / or the optical fiber adapter, the optical fiber connection assembly transmits the data signals with lower reflectivity and transmits the detection signals with higher reflectivity, so that the signal quality of the data signals is ensured, and the detection accuracy is improved. And the intensity of the detection signal reflected by the optical fiber connection assembly can be increased, so that the detection precision of the detection device on the optical link can be improved.

The application discloses an optical link test method and device based on optical frequency domain reflection, which comprises the following steps: measuring echo optical signals of an optical link in an initial state by using a frequency domain reflectometer to obtain a first signal; measuring the echo optical signals of the optical link after changing the function state of the optical link again by using the frequency domain reflectometer to obtain a second signal; performing fast Fourier transform on the measured first signal and second signal respectively to obtain corresponding frequency domain signals and a distance-power relationship curve; converting the same frequency band in the two frequency domain signals into time domain signals by sliding window interception; performing cross-correlation operation on the time domain signals of the two groups of signals to obtain Rayleigh scattering frequency shift; and obtaining a distance-power distribution curve by calculation in combination with a coefficient. The application can realize fast and accurate measurement and calibration of optical field amplitude and phase parameters of an integrated system from a device level to a link level, and efficiently measure return loss, insertion loss, spectrum, delay and other parameters of an optical link on a chip.

The utility model relates to the technical field of optical fiber communication, specifically relates to a device that improves passive optical network link connection compatibility, the passive optical network includes an optical line terminal, a beam splitter and a plurality of optical network units, the input end of beam splitter is connected optical line terminal through first optical fiber, and the output end of beam splitter is connected a plurality of optical network units through second optical fiber, the device includes: ONU optical module is connected with the optical network unit, is used for obtaining the original monitoring quantity of optical link received by optical network unit, and after calculating the attenuation of optical link received by ONU and power demand value, the closest optical power is outputted, OLT optical module is connected with the optical optical line terminal, is used for obtaining the original monitoring quantity of optical link received by optical line terminal, and after calculating the attenuation of optical link received by OLT and power demand value, the closest optical power is outputted. The material consumption is reduced, and the flexibility and stability of system deployment are improved, thereby satisfying the increasing broadband access demand, and improving user experience.

The application provides an optical module and a remote optical module loopback control method based on double MCUs. When a first master MCU of a near-end optical module modifies a value of a loopback message enable register to a first value on a sending end host computer, the first master MCU generates an update enable command. A loopback control register stores a loopback control value written by the sending end host computer and writes the loopback control value into a first slave MCU. The first slave MCU receives the update enable command from the first master MCU and generates a loopback control command according to the loopback control value. The loopback control command stored in the first slave MCU is loaded into a first optical signal. The abnormal positioning of a remote device in an optical link is completed at a local device end. The double MCU control function is adopted, the communication response function of the slave MCU is turned on and off, the slave MCU is not disturbed when sending and receiving messages by the host computer and the master MCU, and therefore the success rate of the loopback control command transmission is improved.

The application discloses an optical fiber fault positioning system, method, controller and computer program product, and belongs to the technical field of optical cable monitoring. The system comprises: a power monitoring circuit of each of two optical fiber sites, and a controller of each of the two optical fiber sites; the power monitoring circuit is connected with a measured optical module of the optical fiber site, and is used for collecting optical information of the measured optical module of the optical fiber site; any controller is used for acquiring the optical information of the measured optical module of the optical fiber site, and in response to the optical information of the measured optical module of the optical fiber site satisfying a preset fault condition, synchronizing the optical information of the measured optical modules of the two optical fiber sites with another controller, and positioning an optical fiber fault based on the optical information of the measured optical modules of the two optical fiber sites. In this way, the fault position of a millisecond-level flash-off and a transient high-loss event can be quickly positioned, and the perception ability and positioning precision of a transient optical link abnormal event are improved.

A quantum computer system comprising at least one quantum computer cell system. The quantum computer cell system comprising an optical link module having an optical cavity. A plurality of qubits compr

A system can include a unit cell of a ring modulator of a coarse wavelength division multiplexing (CWDM) optical link. The unit cell includes a ring resonator including a ring waveguide configured to receive, via a first bus waveguide, an optical signal, and modulate the optical signal to generate a modulated optical signal. The unit cell further includes a multiplexer, disposed between the first bus waveguide and a second bus waveguide, configured to filter the modulated optical signal.

The application discloses a disturbance suppression device and method based on FPGA frequency rapid identification, and belongs to the technical field of tracking control. The device comprises a disturbance tilting mirror, a control tilting mirror, a target, an image sensor and a parallel filtering frequency identification module based on FPGA. When the device is running, the laser emitted by the target is reflected to the control tilting mirror via the disturbance tilting mirror, and then is reflected to the image sensor by the control tilting mirror. The image sensor provides the boresight error. The parallel filtering frequency identification module based on FPGA identifies the time-varying multi-frequency narrow-band disturbance of the boresight error. Then, the control algorithm of the control system containing the error observer calculates the deflection amount of the control tilting mirror. The deflection of the control tilting mirror is driven based on the deflection amount, so that the light beam is kept at the optical axis target position. The disturbance tilting mirror is used to simulate the time-varying multi-frequency narrow-band disturbance from the optical link. The application realizes the rapid and accurate capture of the disturbance characteristics under the condition of time-varying multi-frequency narrow-band disturbance.