732results about "Optical multiplex" patented technology

Various embodiments provide for electro-photonic networks, including a plurality of processing elements connected by bidirectional photonic channels, suited for implementing neural-network models. Weights of the model may be preloaded into memory of the processing elements based on assignments of neural nodes to processing elements implementing them, and routers of the processing elements can be configured to stream activations between the processing elements based on a predetermined flow of activations in the model.

An entangled quantum state receiver includes an optical detector that generates an electrical signal having a signal characteristic in response to detection of a single photon. A first electrical circuit generating an electrical signal having a predetermined duration when the signal characteristic is present at the input. A clock generates a clock waveform with a period. A second electrical circuit generates a state value when the electrical signal has the predetermined duration during a cycle of the clock waveform. A processor is configured to determine received entangled state information from the state value and configured to adjust the clock period based on a background photon count at the optical detector.

The present invention relates to the field of pipeline leakage monitoring. Disclosed is an oil and gas pipeline leakage wave identification and monitoring system. In the present invention, an mCNN is combined with LFLBs for performing feature extraction on an acoustic wave signal collected by a DFB, and the collected data improves information completeness; a three-way parallel one-dimensional CNN used in the present invention exhibits good temporal resolution and sensitivity to high-frequency feature transformations in signals; and the present invention integrates advantages of different scales, enabling the algorithm to learn more features, and incorporating the LFLBs to further extract high-level local features. An mCNN-LFLBs network model of the present invention exhibits significant innovation and advancement on the technical level, and also demonstrates extremely high value in actual application. The network model not only provides a novel and efficient technical means for critical fields such as natural gas pipeline inspection, but also introduces new ideas and methods to research fields related to deep learning and signal processing.

Electro-photonic networks, including a plurality of processing elements connected by bidirectional photonic channels, suited for implementing neural-network models. Weights of the model may be preloaded into memory of the processing elements based on assignments of neural nodes to processing elements implementing them, and routers of the processing elements can be configured to stream activations between the processing elements based on a predetermined flow of activations in the model.

Chromatic dispersion compensation is performed in one or more pluggable optical transceiver (POT) devices operating within an intensity-modulated direct-detection (IMDD) optical network. Compensation is performed within each POT using an electrical and / or optical chromatic dispersion module which are controlled by a set of parameters. A network computing device includes a computer processor and a host management interface for communicating with the POT. In the event of a link failure, the computer processor determines a second set of parameters to control the one or more dispersion compensation module(s) of the POT. The second set of parameters are different from a first set of parameters used to control the one or more compensation module(s) in the case of a first optical path. The computer processor causes the POT to use the second set of parameters in place of the first set of parameters.

The invention provides a light beam demodulation detector based on a multi-layer metasurface and a construction method of the light beam demodulation detector based on the multi-layer metasurface, and the light beam demodulation detector comprises an image processing chip and the multi-layer metasurface. The structured light beam to be identified generates a plurality of diffraction beams after passing through the diffraction neural network formed by the multi-layer metasurface; the diffracted light beams generate different light intensity distributions on the upper surface of the image processing chip, so that the image processing chip determines the type of the structured light beams to be recognized based on the light intensity distributions, and demodulation recognition of the light beams is achieved. According to the light beam demodulation detector based on the multi-layer metasurface and the construction method of the light beam demodulation detector, a demodulation component is constructed by utilizing diffraction neural network simulation and the multi-layer metasurface so as to realize demodulation transmission of structured light beams, and recognition of the types of the light beams is realized in combination with an image processing chip; and a compact light beam demodulation detection device with a miniaturized structure is optimally designed.

Aspects of the disclosure relate to wireless communication including mode division multiplexing of data and reference signals using different orbital angular momentum (OAM) modes. An OAM transmitter may transmit a reference signal (RS) configuration information to an OAM receiver that indicates radio resources for a plurality of OAM modes. The OAM transmitter may further transmit data on a first OAM mode of the plurality of OAM modes using first radio resources of the radio resources indicated by the RS configuration information. The OAM transmitter may further transmit a reference signal on a second OAM mode of the plurality of OAM modes using the first radio resources of the radio resources indicated by the RS configuration information. The OAM receiver may receive the data on the first OAM mode and the reference signal on the second OAM mode. Other aspects, embodiments, and features are also claimed and described.

Integrated laser arrays, photonic devices, packages, and systems are disclosed. An example integrated laser array includes first and second lasers, each laser including a light-emitter structure and a waveguide with a grating. In one aspect, effective pitches of the gratings of the first and second lasers are different by less than about 5 angstroms, while the gratings of the first and second lasers are fabricated with a resolution of at least 1 nanometer. In another aspect, each laser includes a waveguide with left and right sidewall gratings, effective widths of the waveguides of the first and second lasers are different, and an offset between the left and right sidewall gratings of the second laser is different from an offset between the left and right sidewall gratings of the first laser. Integrated laser arrays described herein may be particularly suitable for being implemented in dense wavelength division multiplexed systems.

A device, method, apparatus, and medium for optical channel protection have been disclosed. A method for exemplary optical channel protection may comprise: in response to receiving fault information in an optical transmission network, performing alarm evaluation based on the fault information, wherein the fault information comprises first fault information associated with an electrical layer of the optical transmission network; and generating an action instruction for optical channel switching at least based on the evaluation result.

The invention discloses a tunnel multi-parameter synchronous monitoring method based on a seven-core optical fiber and a fusion association early warning system. The system comprises a sensing module, a data acquisition module, a processing module and an early warning monitoring module, the sensing module comprises a seven-core optical fiber arranged in the tunnel, physical parameters in the tunnel are synchronously monitored through the seven-core optical fiber, and the physical parameters comprise temperature, strain and vibration; the data acquisition module is used for acquiring physical parameter data in real time through the sensing module; the processing module is used for demodulating and fusing the physical parameter data signal to obtain parameter information; and the early warning monitoring module is used for displaying the parameter information in a graphical mode for monitoring, and comparing the parameter information with a corresponding preset threshold value to judge whether the tunnel has a potential health risk so as to carry out early warning. According to the system, the seven-core optical fiber space division multiplexing technology is adopted, and comprehensive and real-time subway tunnel health monitoring and early warning can be provided through multi-parameter fusion measurement.

The inventive system and method of the present invention helps improve transient resiliency of optical network operation by creating one or more optical channel extensions in the network, based on one or more optical data channels. In certain example embodiments, a given provisioned path node may be configured for example to, in addition to expressing and / or dropping a corresponding provisioned optical data channel, also selectively express the provisioned optical data channel through one or more egresses of the provisioned path node that is / are not otherwise employed to establish the provisioned optical data channel path. The presence of such optical channel extension(s) in the optical network can for example serve, in a practical, cost-effective manner, to improve the transient resiliency of one or more downstream links in the network along which one or more of such optical channel extension(s) communicate.

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

Allocating network resources to one or more signals that are to be conveyed over the network by calculating a transport capacity for a sublink of the network based on a spectral efficiency of at least one subpath included in the sublink, and allocating the sublink to at least one signal based on the calculated transport capacity.

An optical reception apparatus includes: a reception detection unit that converts an intensity-modulated optical signal transmitted from an optical transmission apparatus into a frequency modulation signal; a frequency demodulation unit that generates a multi-channel signal by performing demodulation processing on the frequency modulation signal; and a derivation unit that derives, for each channel, a difference between transmission quality and required quality of the intensity-modulated optical signal, and transmits feedback information indicating the difference for each channel to the optical transmission apparatus. The adjustment unit may give priority to a channel having high reception power in the optical reception apparatus and reduce the power of the channel, based on the feedback information. The adjustment unit may give priority to a channel having low transmission quality and increase the power of the channel, based on the feedback information.

Systems and methods include an optical switch system which provides a combination of μLED arrays, PDs, imaging fiber cables, and crosspoint switch on a single chip. The system includes one or more input ports with each input port configured to connect to an input fiber bundle. The system additionally includes one or more output ports with each output port configured to connect to an output fiber cable, wherein each of the input fiber bundle and the output fiber cable include a plurality of fiber cores. An electrical crosspoint switch is connected to the one or more input ports and the one or more output ports, wherein the electrical crosspoint switch is configured to connect a given input port to a corresponding output port, including all signals in the input fiber cable to the corresponding output fiber cable.

Various embodiments provide for clock signal distribution within a processor, such as a machine learning (ML) processor, using a photonic fabric.

A digital image transmitter includes a wavelength division multiplexer and demultiplexer, a printed circuit board (PCB) unit connected to the wavelength division multiplexer and demultiplexer, a first housing accommodating the wavelength division multiplexer and demultiplexer and the PCB unit, and a second housing covering the first housing, wherein a contact body is arranged between the wavelength division multiplexer and demultiplexer and the first housing, and each of the wavelength division multiplexer and demultiplexer and the first housing contacts the contact body.

This application provides a port detection method and apparatus. In the technical solutions in this application, an OLT or an ONU may determine, based on at least two wavelengths and a preset correspondence, port information that is of an optical splitter and that corresponds to the ONU. That is, a branch port directly or indirectly connected to the ONU is defined by using the at least two wavelengths. In this way, different branch ports can be distinguished by using combinations of a plurality of wavelengths, to define a large quantity of branch ports of the optical splitter by using free combinations of a small quantity of wavelengths.

A route calculation method, device, and system. The route calculation method includes: receiving, by a first device, a service request message, where the service request message is used to request the first device to determine a transmission path of a borne service requested by the service request message to be established; and determining, by the first device, a transmission path of the service based on the service request message and first bearing capability information, where the first bearing capability information is used to indicate an actual bearing capability of each link on the transmission path. According to the foregoing solution, the system can calculate a route and configure the service based on an actual service bearing capability of each link of a network.

An entangled quantum system can be generated using entanglement-generating circuits that operate non-deterministically. Multiple instances of the entanglement generating circuit can be operated and outputs of successful instances can be propagated. The circuit can be implemented such that a photon that is part of the final output state passes through as few as one or two active switches from generation to the final output state.

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 present invention discloses a wireless cross-domain acoustic communication system and method based on acoustic holography. The acoustic holographic device used for cross-domain acoustic communication consists of a single-layer acoustic holographic phase plate, an array transducer, and a camera vision module, wherein each array element of the array transducer has two states: on / off. After receiving the communication coding signal transmitted in the water, the transducer array elements at the corresponding positions can be sequentially selected and the dynamic regulation of the incident sound field can be realized. Then, the sound is transmitted to the water-air interface through the single-layer holographic phase plate and phase-modulated. Under the action of the acoustic radiation force, the interface will deform. The camera vision module is used to capture and parse and decode the deformation of the water surface, completing the wireless reception of information across the water-air interface. The present invention can directly transmit underwater information to the air. The equipment is simple and the relative position requirements of the transmitting and receiving devices are not strict. It is applicable to liquid environments of any temperature, salinity, and density.

An optical communication apparatus includes an optical switch, a wavelength management control unit, and an optical switch control unit. The optical switch is connected to a plurality of transmission lines and outputs an optical signal input from one of the transmission lines to another of the transmission lines. The wavelength management control unit assigns a wavelength to a subscriber terminal according to a communication destination. The optical switch control unit controls the optical switch such that it outputs an optical signal transmitted from the subscriber terminal, to which a wavelength has been assigned, to a transmission line corresponding to its forwarding destination on a path to the communication destination.

An optical transmission system includes a transceiver configured to output an optical signal to a first optical fiber core, wherein the first optical fiber core is configured to reflect a portion of the optical signal back toward the transceiver. The optical transmission system further includes a second optical fiber core proximate the first optical fiber core, wherein the second optical fiber core is configured to receive crosstalk of the reflected portion of the optical signal from the first optical fiber core. The optical transmission system further includes a detector configured to receive the crosstalk of the reflected portion of the optical signal and generate detection data based on the crosstalk of the reflected portion of the optical signal. The optical transmission system further includes a controller configured to receive information related to the detection data, and determine whether the optical transmission system is functioning properly based on the detection data.

A system and method for distributing quantum entanglement using optically protected fiber optical paths is described. In some embodiments, multiple optical paths are used to connect a source site to a receiver site. Quantum entangled particles are transmitted from the source site to the receiver site using a first one of the multiple optical paths and related service channel information is transmitted from the source site to the receiver site using a second one of the multiple optical paths. In response to a failure of either the first or second optical path, an entanglement distribution controller automatically updates the routing such that the service channel information and the quantum entangled particles are routed concurrently on a remaining one of the first or second optical path.

An integrated photonic device independently directs each channel of a multiplexed input optical signal received from a corresponding one of N input port to one of N output ports, each multiplexed input optical signal including N channels. The device includes: N input waveguides; secondary waveguides; wavelength-selective filters, each: i) including a ring resonator, ii) being optically coupled to a corresponding one of the N input waveguides and a corresponding one of the secondary waveguides, and iii) being switchable between a first state in which an optical signal in a corresponding one of the N channels is coupled from the corresponding input waveguide into the corresponding secondary waveguide and a second state in which the optical signal in the corresponding one of the N channels is not coupled into the corresponding secondary waveguide; N multi-wavelength mixers; and N output waveguides.

The invention discloses a communication parameter monitoring method and system, and relates to the technical field of optical fiber communication, the communication parameter monitoring method is applied to the communication parameter monitoring system, the communication parameter monitoring system comprises a sending end and a receiving end, and the communication parameter monitoring method comprises the following steps: the sending end inserts a preset pilot frequency in to-be-transmitted information to generate a modulation signal; the sending end sends the modulation signal to a receiving end, and a receiving signal is obtained after coherent receiving; the receiving end carries out digital signal processing on the received signal and extracts pilot frequency information; and the receiving end calculates communication parameters between the sending end and the receiving end according to the pilot frequency information. The signal and the frequency domain pilot frequency are simultaneously transmitted and received, and the power of the frequency domain pilot frequency is far less than the power of the signal, so that the influence on the signal can be ignored, the online monitoring can be realized on the basis of not interrupting the communication service, and the multi-damage cooperative monitoring is realized. Through the communication parameter monitoring method, guarantee can be provided for stable operation and resource scheduling of the space division multiplexing system.

The invention relates to the technical field of optical communication, in particular to an optical communication channel power dynamic balancing method. Local power is monitored in real time at each relay node, channel paths with different transmission losses are selected through optical switch routing decision, in optical transmission between adjacent nodes, the power attenuation amplitude of a high-power input signal after being transmitted in a high-loss path is large, and the power attenuation amplitude of a low-power input signal after being transmitted in a low-loss path is small. After the signals are transmitted for a certain distance, the power difference of the signals is reduced, and the signals are amplified by the multi-core optical fiber amplifier of the next node, so that the power dynamic balanced transmission of the channels is realized; not only is the power balanced transmission of the channel realized, but also the system energy consumption is effectively reduced, and the transmission energy efficiency is improved.

The application discloses a communication system, related equipment and method. The communication system comprises a CO device and a plurality of RRHs. The plurality of RRHs form a ring network through optical fibers, and the CO device is connected to the ring network. The CO device is used for modulating a baseband signal onto N first optical carriers generated by the CO device to obtain N second optical carriers, and transmitting the N second optical carriers to the ring network through a first optical fiber. Any one of the plurality of RRHs is used for obtaining a target optical carrier from the received second optical carrier, converting the target optical carrier into an electrical signal, and transmitting the electrical signal as a downlink signal. The embodiment of the application realizes an all-optical communication system through the layout of optical devices on the architecture and through the optical ring network topology, and the communication system has a self-healing protection function.

A system that steers the bandwidth allocation for ONTs based upon temporal usage of bandwidth.