177 results about "Optical link" patented technology

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 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 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.

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 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 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.

This application relates to the field of communication technology and discloses a method and apparatus for detecting anomalies in an optical link. The method includes: when anomaly detection of the optical link is triggered, acquiring a first bit error rate (BER) of a first test message sent by a first optical module to a second optical module at a first transmit power; when the first BER is less than a BER threshold corresponding to the first transmit power, acquiring a second BER of a second test message sent by the first optical module to the second optical module at a second transmit power, where the first transmit power is less than the second transmit power; when the second BER is greater than or equal to the BER threshold corresponding to the second transmit power, determining that an anomaly exists in the optical link. Using the above method can improve the accuracy of optical link anomaly detection.

The invention discloses an inter-satellite high-precision ranging system and method based on a balanced timing detection technology, and relates to the technical field of space precision measurement and time frequency transmission. The system comprises a first satellite terminal and a second satellite terminal which are connected through a bidirectional free space laser link. Each terminal is equipped with a clock optical frequency comb as a time reference and a time programming optical frequency comb as a local tracking oscillator. According to the invention, the full-digital sequential control capability of the TPFC is utilized, the pulse phase is dynamically regulated and controlled through the FPGA, and rapid scanning and real-time locking tracking of an inter-satellite high-speed moving target are realized; meanwhile, in combination with a balance optical cross-correlation (BOC) technology based on a nonlinear crystal, background noise is eliminated by utilizing differential detection, and high-sensitivity femtosecond-level time synchronous detection close to quantum limit is realized. The system has the characteristics of compact structure, high dynamic adaptability, excellent anti-noise performance and the like.

The invention relates to the technical field of communication, in particular to a method and a device for identifying hidden dangers of a forward optical link. The method comprises the steps that under the condition that the fault-free out-of-service duration corresponding to a target base station meets the duration requirement, a multi-dimensional factor set corresponding to a forward transmission optical link of the target base station is acquired, and the multi-dimensional factor set comprises at least two factors; obtaining a weight corresponding to each factor in the multi-dimensional factor set; and according to the multi-dimensional factor set and the weight corresponding to each factor, obtaining hidden danger identification information corresponding to the forward optical link of the target base station. By adopting the method and the device, the accuracy and the efficiency of identifying the hidden danger of the front-pass optical link of the 5G base station can be improved, the hidden danger problem of the optical link can be identified before the optical path fault alarm appears, the avoidance processing is performed in advance, the network stability is improved, and the 5G network quality is guaranteed.

Systems and methods for operating a passive optical network (PON) extender. The methods comprise: receiving, by the PON extender, a first optical signal from a remote node device of a passive optical network via a first optical link; amplifying the first optical signal using a Raman amplifier of the PON extender to obtain a first Raman amplified optical signal; amplifying the first Raman amplified optical signal using a first optical amplifier of the PON extender to obtain an amplified uplink signal (wherein the first optical amplifier is different than the Raman amplifier); and passing the amplified uplink signal to an optical line terminal via a second optical link (wherein the optical line terminal is disposed locally at a hub site along with the PON extender).

An optical power supply includes a plurality of lasers in a laser array. Each of the plurality of lasers is configured to generate a separate beam of continuous wave laser light. The optical power supply includes a temperature sensor that acquires a temperature associated with the laser array. The optical power supply includes a digital controller that receives notification of the temperature from the temperature senor. The optical power supply includes an optical power adjuster controlled by the digital controller. The optical power adjuster adjusts an optical power level of one or more beams of continuous wave laser light generated by the plurality of lasers to produce an optical power encoding that conveys information about the temperature associated with the laser array as acquired by the temperature sensor. An electro-optic chip receives the beams of continuous wave laser light from the optical power supply and decodes the optical power encoding.

Provided in the present disclosure are an Ethernet card, a communication module, and a server. The Ethernet card comprises a plurality of network card chips and a plurality of connectors, wherein each of the connectors is used for connecting an optical module, any of the connectors is connected to at least two network card chips, and any of the network card chips is connected to at least two connectors. A single network card integrates a plurality of independent network card chips and a plurality of connectors; any of the connectors is connected to at least two network card chips, any of the network card chips is connected to at least two connectors, and the plurality of network card chips are cross-connected to a plurality of optical module connectors, such that electrical channels of the plurality of network card chips are cross-aggregated on the plurality of connectors. When a failure occurs in an optical module on a link where any connector is located, only part of the bandwidth of the connected network card chip is affected, without causing communication interruption to any network card chip, thereby reducing the impact of the failure in the optical module or optical link on a multi-GPU parallel computing task, and improving the efficiency of the multi-GPU parallel computing task.

The invention relates to a multi-beam IQ data synchronization method based on source end pre-bias and receiving end shallow cache. The method comprises the following steps that: a receiving end measures round-trip delay of an optical link and calculates a pre-bias containing integer and decimal components; the sending end adjusts a buffer read pointer and controls a digital fractional delay filter to perform source end compensation; and a receiving end absorbs residual jitter by using a shallow-depth elastic buffer unit, and uniformly triggers reading after a full link is ready. The method has the advantages that the resource consumption of the receiving end is greatly reduced, the certainty low time delay is ensured, the dynamic thermal drift compensation is supported, and the high-precision sample point level alignment is realized.

Provided is an optical link. The optical link supports duplex communication of an auxiliary channel for transmitting, between a display source and a display sink, extended display configuration data (EDID) that is related to rendering of the display sink or display port configuration data (DPCD) related to setting of a main link. The optical link is capable of preventing a data transfer error despite a transmission delay or distortion due to non-linearity between an input and an output due to movement of the optical link by setting the main link to be optimized for the optical link, which is different from a request by the display sink with respect to setting of a training pattern, in link training between the display source and the display sink. According to the optical link according to the disclosure, in one-to-multi display in which a plurality of display sinks are connected to one display source, dislocation or instability of the arrangement of a plurality of screens, which may be caused by a change in a connection state of any one display sink, may be prevented, and after the display sink returns to a normal connection state, delay of a video output for the resetting of the main link may be prevented.

The present disclosure relates to full-duplex electrical communication suitable for optical links. A first node signal separation circuit obtains a first node electrical transmit signal (TX1) from a full-duplex electrical communication signal. A first node transmit component converts TX1 to a first node optical transmit signal (OTX1) and transmits OTX1 via an optical link. A second node receive component receives OTX1 and converts it to the first node electrical transmit signal (TX1) at the second node. A second node signal separation circuit obtains a second node electrical transmit signal (TX2) from the full-duplex electrical communication signal at the second node. A second node transmit component converts TX2 to a second node optical transmit signal (OTX2) and transmits OTX2 via the optical link. A first node receive component receives OTX2 from the optical link and converts it to TX2 at the first node. At each node, the full-duplex electrical signal comprises a superposition of a locally transmitted electrical transmit signal and a corresponding electrical transmit signal received from the optical link.

The present application relates to the technical field of computer network, and specifically relates to a DCN implementation method based on fusion optical transmission equipment, which comprises the following steps: directly transmitting various data messages of upper layer application on optical links of packet transmission technology system; using data management bytes of SDH STM-N frame OAM overhead part to realize the transmission of various data messages of upper layer application on optical links of SDH technology system; using general communication channels in OTUk\ODUk\OPUk three-level overhead to realize the transmission of various data messages of upper layer application on optical links of OTN technology system; and the upper layer application uniformly processes the data message receiving and sending of all protocol ports through the DCN channel, so that the DCN implementation method can realize that the upper layer application does not need to perceive the technology system used by the link layer optical channel, and the DCN management message is transmitted without difference, so as to realize the intelligent planning, routing re-optimization and other functions of the SDN controller on the service bearing path of the optical fiber link of different systems.

The embodiment of the application provides an optical assembly, a communication device and an optical communication network, and relates to the field of optical communication. The performance of the optical assembly is optimized. The specific scheme comprises: the optical assembly comprises a laser and a first optical waveguide. The laser is used for outputting a multimode signal light. The first optical waveguide comprises a first end and a second end arranged oppositely; the first end is used for receiving the first multimode signal light, and the second end is used for outputting a light beam from the first end. Wherein, the diameter of the core layer of the first end is 10-45 mu m, and the numerical aperture of the first end is 0.1-0.25. The rate of the multimode signal light is greater than or equal to 50 Gbps. The core layer of the first end can intercept the light rays of the high-order modes in the reflected light which are opposite to the transmission direction of the multimode signal light, reduce the noise of the laser, optimize the reliability of the laser and the optical assembly, and improve the problem of optical link flash.

The invention provides an optical link monitoring method, an optical link monitoring device and network equipment. In the embodiment, a first detection signal is obtained, and the first detection signal is a signal received by a receiving end after being transmitted through an optical link; and determining the operation and maintenance problem of the optical link according to the peak value of the first detection signal at each frequency point. Therefore, the optical link monitoring cost can be reduced, and the service operation efficiency can be improved.

Provided in the present application are an optical link monitoring method and apparatus, and a network device. In the embodiments, the method comprises: acquiring a first detection signal, wherein the first detection signal is a signal received at a receiving end after being transmitted by means of an optical link; and determining an operation and maintenance problem of the optical link on the basis of the peak value of the first detection signal at each frequency point. Therefore, the cost of optical link monitoring can be reduced, and the service operation efficiency can be improved.

The application relates to the technical field of optical element testing, and discloses a fiber connector butt joint position deviation detection method and system. The method first performs physical butt joint on a standard reference jumper fiber, collects a static reference insertion loss value and a transient Fresnel reflection dithering waveform of a butt joint full cycle, extracts an end face structure scattering entropy, and constructs a multi-dimensional optical transmission characteristic reference library; then real-time transient waveforms of on-site butt joint are collected and real-time scattering entropy is calculated, feature matching is performed, decoupling branch determination of end face physical defects and mechanical geometric position deviation is completed, and a to-be-corrected optical link data packet is generated according to the position deviation; finally, a connection point characteristic signal is obtained through iterative deconvolution signal reconstruction, three-dimensional position deviation is analyzed, and a correction instruction is generated to perform closed-loop verification; the application effectively avoids end face damage caused by end face defect misjudgment, and realizes high-precision detection and adaptive correction of butt joint position deviation.

This invention discloses a short-window gamma-gamma turbulence parameter prediction method for space-to-ground laser communication, belonging to the technical field of space-to-ground laser communication and atmospheric turbulence channel parameter prediction. This method addresses the problems of traditional methods, such as strong dependence on long observation windows, significant degradation in prediction accuracy under short-window scenarios, and insufficient robustness under low signal-to-noise ratio conditions. It establishes a short-window observation model for the space-to-ground optical link and a gamma-gamma channel statistical model, constructs time-dependent short-window training data, and designs a short-window gamma-gamma network. Temporal features are extracted through a convolutional backbone, and a scintillation exponential physical regularization auxiliary head is used to achieve joint parameter prediction under physical constraints, outputting predicted gamma-gamma distributed parameters. This method can achieve high accuracy and good stability in parameter prediction under short observation windows and low signal-to-noise ratio conditions, and can be used for turbulence channel state characterization at the space-to-ground laser communication receiver.

The invention discloses a strong light link reliability coupling method, system and device and a storage medium, and relates to the technical field of reliability engineering.The method comprises the steps that reliability parameter mapping of all parts of a system is obtained based on a pre-constructed model-based system engineering MBSE digital model of a strong light link system; dynamically calculating a fault-free working time MTBF of the highlight link system according to the reliability parameter mapping; performing fault propagation simulation according to the MBSE digital model and a predefined fault mode library; and according to the MTBF and the fault propagation simulation result, generating reliability evaluation of the highlight link system. According to the method, based on parameter mapping and dynamic coupling calculation of the MBSE model, multi-physical field simulation can be integrated in real time, such as heat and electricity data or actually measured data, working condition parameters are dynamically corrected, and dynamic, precise and systematic analysis of reliability evaluation is realized.

The invention discloses a combustible gas non-inductive detection camera system integrated with a spectrum sensor, and relates to the technical field of gas imaging detection, and the combustible gas non-inductive detection camera system comprises the following steps: establishing multi-source observation through a reference measurement frame which shares at least part of an optical link with a main imaging light path, and outputting a fixed reference area statistical abstract, a temperature observation vector and a reference data effective mark; updating the drift state quantity based on the statistical abstract and the temperature observation vector and generating a stability field; performing drift compensation on the infrared image sequence according to the drift state quantity and the stability field, and generating an operation envelope field, a quantization result, a confidence interval and error source decomposition; and finally, executing gating output and writing back scheduling parameters. According to the scheme, continuous connection of reference observation, drift estimation, quantitative judgment and feedback scheduling is achieved, and the output stability, the quantitative credibility and the continuous operation capacity under the fixed online detection condition are improved.

A method may include obtaining a first waveform corresponding to a first optical signal received at a first optical receiver via an optical link, and a second waveform profile corresponding to a second optical signal received a second optical receiver. The first waveform profile and the second waveform profile may be combined to form a combined waveform profile. A first reconstructed waveform profile that is an estimate of the first waveform profile and a second reconstructed waveform profile that is an estimate of the second waveform profile may be obtained. The first reconstructed waveform profile and the second reconstructed waveform profile may be combined to form a combined reconstructed waveform profile which may be emulated to obtain an emulated reconstructed waveform profile. A power profile estimation corresponding to the optical ink may be determined based on a comparison between the combined waveform profile and the emulated reconstructed waveform profile.