462 results about "Optical link" patented technology

A system includes a housing and a first circuit board positioned inside the housing. The housing has a top panel, a bottom panel, a left side panel, a right side panel, a front panel, and a rear panel. The front panel is at an angle relative to the bottom panel in which the angle is in a range from 30 to 150°. The first circuit board has a length, a width, and a thickness, in which the length is at least twice the thickness, the width is at least twice the thickness, and the first circuit board has a first surface defined by the length and the width. The first surface of the first circuit board is at a first angle relative to the bottom panel in which the first angle is in a range from 30 to 150°. The first surface of the first circuit board is substantially parallel to the front panel or at a second angle relative to the front panel in which the second angle is less than 60°. The system includes a first data processing module and a first optical interconnect module both electrically coupled to the first circuit board. The optical interconnect module is configured to receive first optical signals from a first optical link, convert the first optical signals to first electrical signals, and transmit the first electrical signals to the first data processing module.

The invention relates to the technical field of network service testing, in particular to a testing method and system based on optical fiber characteristics. The method comprises the following steps: acquiring multi-dimensional optical fiber characteristic data of an optical fiber link through optical fiber characteristic acquisition equipment; performing characteristic data hierarchical integration on the multi-dimensional optical fiber characteristic data to obtain an optical link characteristic vector group; performing temperature-error code wavelet transform association according to the optical link feature vector group to obtain a temperature-error code wavelet feature set; constructing an association prediction matrix according to the temperature-error code wavelet feature set; performing a service delay exception test according to the association prediction matrix to obtain a delay tail exception event set; and performing micro-bend three-dimensional feature recognition according to the delayed tail abnormal event set to obtain micro-bend mode features. According to the invention, the operation and maintenance efficiency, reliability and toughness of the optical fiber network of the data center are improved through full-link test analysis from optical fiber physical characteristics to storage service delay.

A system includes a housing and a first circuit board positioned inside the housing. The housing has a top panel, a bottom panel, a left side panel, a right side panel, a front panel, and a rear panel. The front panel is at an angle relative to the bottom panel in which the angle is in a range from 30 to 150°. The first circuit board has a length, a width, and a thickness, in which the length is at least twice the thickness, the width is at least twice the thickness, and the first circuit board has a first surface defined by the length and the width. The first surface of the first circuit board is at a first angle relative to the bottom panel in which the first angle is in a range from 30 to 150°. The first surface of the first circuit board is substantially parallel to the front panel or at a second angle relative to the front panel in which the second angle is less than 60°. The system includes a first data processing module and a first optical interconnect module both electrically coupled to the first circuit board. The optical interconnect module is configured to receive first optical signals from a first optical link, convert the first optical signals to first electrical signals, and transmit the first electrical signals to the first data processing module.

The invention provides a light splitting link fault sensing and early warning method, which comprises the following steps of: accessing flow among upstream user plane network elements to downstream deep packet inspection equipment through intermediate equipment, acquiring the flow among the user plane network elements through the deep packet inspection equipment, and detecting and analyzing a user plane flow data packet; analyzing the single user plane flow data packet to obtain an outer-layer IP pair and an inner-layer quintuple, judging whether an inner-layer protocol in the inner-layer quintuple is TCP protocol data, and if so, recording the flow direction of the outer-layer IP pair of the user plane flow data packet; counting the uplink / downlink traffic of the outer IP pair of the user plane traffic data packet recorded in the detection period, and generating a traffic statistical information table; and judging whether the uplink flow or the downlink flow of the outer-layer IP pair in the flow statistical information table is 0, and if so, carrying out link fault early warning. According to the sensing and early warning method for the light splitting link fault, the light splitting link fault of the upstream equipment can be sensed when the condition of the upstream light splitting link is unknown.

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 a microwave laser hybrid link radio star calibration device and method suitable for deep space exploration, and relates to the field of spaceflight deep space exploration. Pointing calibration of a microwave and laser hybrid link of a deep-space large-aperture antenna is completed through radio star calibration, firstly, after pointing calibration and stable tracking of the microwave link are conducted on the microwave link, fine tracking is conducted on the laser link, pointing calibration of the laser link is completed, respective pointing error correction coefficients are formed, and real-time correction of antenna pointing is achieved. Microwave laser link hybrid radio star calibration is not limited by distance and geographical conditions, and real-time calibration can be realized; the beam of the laser link is narrower than that of the microwave link, the calibration precision is higher, and the system pointing precision and the photoelectric axis consistency precision can be improved. The method is simple in design, high in generalization, low in implementation difficulty and convenient to implement and popularize.

Coherent wavelength division multiplexing is provided using frequency comb sources for both the transmitter and the local oscillator (LO) in the receiver. The local oscillator is made phase coherent with the received multifrequency optical signal using two analog control loops. One of the control loops locks an optical frequency of the local oscillator to an optical frequency of the received frequency comb. The other control loop locks a microwave frequency of the local oscillator (i. e. LO the comb spacing) to the comb spacing of the received frequency comb. As a result, coherent detection is enabled in all channels with just two analog control loops. Control signals for the two loops can be derived from two of the received channels individually (asymmetric carrier recovery), or they can be derived from sum and difference signals from two of the received channels (symmetric carrier recovery).

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.

Disclosed is a system and method for sharing memory and enlarging capacity between computer resources using optical links. In certain embodiments, high bandwidth memory is shared between multiple processing units through electrical and optical switching.

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.

The invention discloses detection equipment, communication equipment, a detection method and a communication system, which are applied to the technical field of communication based on an optical path and are used for carrying out transmission fault detection on an optical transmission path. The optical transmission path comprises a home-end optical module assembly, a plurality of home-end wavelength division optical link groups, a home-end combiner / splitter and a plurality of far-end wavelength division optical link groups which are sequentially coupled. According to the scheme, based on the characteristic that the detection precision of the OTDR detection function is greater than the filtering precision of the multiplexer / demultiplexer, detection of transmission faults on different optical links coupled by the multiplexer / demultiplexer can be realized. Through the above mode, no extra detection device needs to be arranged, and cross-link comprehensive detection of different optical links coupled on the combiner / splitter can be realized by adopting a conventional device for realizing optical transmission based on the combiner / splitter. According to the invention, the transmission fault of the optical transmission path can be detected comprehensively with low cost and high precision, and the method can be applied to forward transmission networking of wireless communication and / or optical communication networking.

The present invention relates to the field of high-rate mobile wireless communications. Disclosed are a multi-frequency multi-polarized wide-beam scanning base station system, and an optimization design method. The method comprises: on the basis of an aperture field expansion theory and a mode coupling theory, designing a conical horn feed source antenna capable of radiating a Gaussian fundamental mode beam, and providing a stable beam width and a stable phase center; designing a beam separation device based on a periodic structure, wherein the beam separation device includes band-pass frequency selective surfaces and a linear polarization grid; and combining front-end quasi-optical links of multiple frequency channels and multiple polarized channels, so as to increase the bandwidth and communication rate of a base station antenna. In the present invention, a genetic optimization algorithm is combined with reflector shaping, thereby effectively reducing the conflict between a shielding effect of a dual-reflector antenna and a scanning angle, and realizing the multiplication of a beam scanning angle.

Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit sequence is output. On a receive end of the link, a decoder is provided that outputs the k-bit sequence every n clock cycles. Accordingly, buffers need not be provided at the output of the encoder and the input of the decoder, such that processing of the input sequence, codewords, and output sequence may be achieved efficiently without large buffers and complicated circuitry. Moreover, the input sequence, with any binary alphabet may be matched to a desired output distribution with any arbitrary alphabet. Accordingly, probabilistic constellation shaping may be achieved over constellations of arbitrary size. In addition, relatively long codewords, may be encoded and decoded with the apparatus and method disclosed herein. Accordingly, for a fixed SNR a higher SE (more bits per symbol) can be achieved. Alternatively, for a fixed SE, a lower SNR may be sufficient. Moreover, the resulting SE may be finely tailored to a particular optical link SNR to provide data transmission rates that are higher than the low order modulation formats that would otherwise be employed for optical signals carried by such links.

A distributed data processing system includes a first data processing system and a second data processing system. The first data processing system includes a first housing, a first data processor, and a first optical module that is configured to convert output electrical signals from the first data processor to output optical signals that are provided to a first optical fiber cable. The second data processing system includes a second housing, a second data processor, and a second optical module that is configured to convert output electrical signals from the second data processor to output optical signals that are provided to a second optical fiber cable. An optical power supply includes at least one laser that is configured to provide a first light source to the first optical module through a first optical link and to provide a second light source to the second optical module through a second optical link.

The present disclosure provides an integrated circuit (IC) structure. The IC structure includes an optical interposer having optical waveguides; a plurality of chip stacks disposed over the optical interposer, each of the plurality of chip stacks including a first photonic IC chip and a memory chip over the first photonic IC chip; and a plurality of first laser source chips disposed adjacent to the plurality of chip stacks, respectively, wherein the optical waveguides in the optical interposer are configured as an optical interconnect structure to couple with the memory chip through the first photonic IC chip.

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 belongs to the technical field of data analysis, and particularly relates to a wide fixed network user optical link quality standard analysis and monitoring method. Comprising the following steps: S1.1) collecting optical power data and optical signal spectrum data in an optical link; s2) feature extraction; s3) constructing an One-Class SVM (Support Vector Machine) model, and training the One-Class SVM model by using a large number of feature vector data sets which reach the standard; and S4) the trained One-Class SVM model is deployed in a monitoring system. A One-Class SVM model is adopted, and the advantages of the One-Class SVM model in single-class data anomaly detection are fully utilized; by constructing a boundary hyperplane in a high-dimensional space, high-sensitivity detection of data deviating from normal distribution is realized. The limitation that a traditional classification algorithm needs a large number of positive and negative sample labeling is avoided, and the difficult problem of optical link signal data labeling is solved.

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 a microwave laser composite antenna off-axis tracking method suitable for deep space exploration, and relates to the field of spaceflight deep space exploration. According to the method, Ka frequency band link angle tracking is completed firstly, and then a laser link is guided to be captured and tracked rapidly. Microwave link wave beam off-axis tracking is adopted, and simultaneous real-time target tracking of a microwave link and a laser link is achieved; the Ka beam is used for guiding the laser beam to rapidly capture and track, so that the laser beam coarse tracking robustness is improved, and the capture time is reduced; after the laser link finishes fine tracking, the system performs target tracking by using laser beam tracking, and compared with microwave Ka beam tracking, the tracking precision is higher; by using microwave link wave beam off-axis tracking, the problem that microwave link wave beams and laser link wave beams cannot be simultaneously aligned with a target due to inconsistent directions of a microwave electric axis and a laser optical axis is avoided. The scheme is simple and easy to realize, and can be directly applied to the existing integrated antenna.

A bi-directional optical communication system employing a minimum number of single-mode high repetition rate pulsed optical signal sources to achieve cost efficiency while maintaining high data rates. The bi-directional optical communication system includes a first optical data processing unit and a second optical data processing unit. The first optical data processing unit modulates a pulsed optical source using a differential quadrature phase shift keying (DQPSK) modulation and two-level pulse amplitude (PAM-2) modulation and then demodulates it to achieve a pulse amplitude modulated signal. The second optical data processing unit reuses the same optical carrier by passing it through a regenerative wavelength converter to generate three pulsed optical carriers at different wavelengths and employs an On-off keying (OOK) modulation scheme. These carriers are employed to send uplink data at a same rate of as the downlink. As a result, large data is transmitted from one data center to another data center through a downlink and uplink free space optical link network.

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 an optical network system and light splitting equipment, and relates to the technical field of optical communication. The optical network system comprises a detection device, a first optical splitter and an optical filter. The first optical splitter comprises a light inlet and N light outlets, wherein N is greater than or equal to 2. A light inlet of the first optical splitter is connected with detection equipment, N-1 light outlets of the first optical splitter are connected with inlets of N-1 optical filters in a one-to-one correspondence manner, outlets of the N-1 optical filters are connected with N-1 light splitting links, and different optical filters are used for selecting optical signals with different wavelengths to pass through. And the detection equipment is used for sending the detection light signals with different wavelengths to the first optical splitter and receiving the detection light signals returned by the at least one optical splitting link. Based on the optical network system, the detection optical signals emitted by the detection equipment can respectively enter different light splitting links, and the detection optical signals returned from the light splitting links and received by the detection equipment can reflect the state information of one light splitting link, so that the measurement and acceptance of the light splitting links can be realized at a local side.

A method for distributed allocation of data paths in an optical network (100) including optical switches (30, 32, 130) connected by optical links (44, 140), includes receiving a request for a data path for connecting a source node (10) and a destination node (20). In in response to the request, one or more queries are sent, the queries corresponding to one or more candidate optical circuits that connect the source node and the destination node, the queries requesting one or more processors (230) to configure the optical switches along the candidate optical circuits to reserve optical channels on the optical links of the candidate optical circuits for the requested data path. An optical circuit is identified from among the candidate optical circuits, in which all the optical channels for the requested data path have been reserved successfully. The requested data path is established over the identified optical circuit.

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 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.

Systems and methods for Doppler frequency shift compensation in free space optical links include a modulator configured to modulate a transmitter laser; a receiver including a Local Oscillator (LO) laser configured to receive a coherent signal; and circuitry configured to tune a frequency of the transmitter laser and the LO laser based on an amount of Doppler frequency shift to be compensated. The systems and methods determine an amount of Doppler shift between a first and second satellite and tune the frequency of the transmitter and LO laser based on the determined amount of Doppler frequency shift.