DETECTING TRANSMITTER-RECEIVER MISCONFIGURATIONS IN OPTICAL SIGNAL PATHS

CENTRALIZED TESTING OF OPTICAL TRANSPORT SYSTEMS

SEGMENTATION-BASED ACTIVITY DETECTION IN FIBER OPTIC NETWORK

DEVICE AND METHOD FOR DISPERSION MEASUREMENT FROM RECEIVED SIGNAL

OPTICAL INTERCONNECTS FOR FLEXIBLE CALIBRATION OF AN OPTICAL TRANSCEIVER IN A FREE-SPACE OPTICAL COMMUNICATION SYSTEM

RECEIVER MONITORING IN LINEAR RECEIVER OPTICS

OPTIC POWER MONITORING SYSTEM

APPARATUS AND METHOD FOR MONITORING ANALOG CHARACTERISTIC OF OPTICAL TRANSMITTER, AND OPTICAL TRANSMITTER

COMMUNICATION PROCESSING METHOD AND RELATED APPARATUS

SYSTEM AND METHOD FOR MONITORING OPTICAL COMMUNICATION CHANNEL

SEPARATION SYSTEM

INFORMATION DETECTION METHOD AND SYSTEM

PATH IDENTIFICATION SYSTEM, PATH IDENTIFICATION METHOD, MONITORING DEVICE, MONITORING DEVICE CONTROL METHOD, AND RECORDING MEDIUM

LIGHT INTENSITY MODULATION DEVICE AND WAVEFORM COMPRESSION DEVICE

METHOD AND DEVICE FOR MONITORING GENERALIZED OPTICAL SIGNAL-TO-NOISE RATIO, COHERENT RECEIVER AND NETWORK APPARATUS

FIBER SENSING CONTROL DEVICE

OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD

OPTICAL COMMUNICATION MODULE, DEVICE, AND SYSTEM

Coherent receiver having low VOA-induced phase changes

OPTICAL COMMUNICATION DEVICE AND CONTROL METHOD FOR OPTICAL COMMUNICATION DEVICE

Intra-automobile power and communications via fiber

Fiber optic cable fault locating apparatus

Optical cable mismatch error detection/remediation

WAVELENGTH MULTIPLEXING DEVICE AND WAVELENGTH MULTIPLEXING METHOD

OPTICAL TRANSMISSION SYSTEM, TRANSMISSION APPARATUS, RECEIVING APPARATUS AND METHOD FOR DEVICE CHARACTERISTIC ESTIMATION

Quantum probability encoding for communication systems

Protection switching based on SNR calculations

EQUALIZATION APPARATUS, OPTICAL COMMUNICATION SYSTEM, AND EQUALIZING METHOD OF OPTICAL SIGNALS

OPTICAL SPACE COMMUNICATION MANAGEMENT DEVICE, OPTICAL SPACE COMMUNICATION SYSTEM, AND OPTICAL SPACE COMMUNICATION MANAGEMENT METHOD

METHOD AND DEVICE FOR CORRECTING POLARIZATION DISTORTION OF FARADAY ROTATOR MIRROR FOR QUANTUM KEY DISTRIBUTION IN COMMUNICATION SYSTEM

OPTICAL COMMUNICATION MONITORING DEVICE

COMMUNICATION MONITORING APPARATUS AND COMMUNICATION MONITORING SYSTEM

Reacquiring communication link based on historical data

Coherent receiver having low VOA-induced phase changes

Fast fiber transient locating systems and methods

Method and apparatus for mapping out sources of decoherence in quantum channels

Monitoring apparatus, monitoring method, and non-transitory computer-readable medium containing program

PARAMETER REPORTING TECHNIQUES FOR REDUCED CAPABILITY USER EQUIPMENT

S/N ratio estimation circuit, and adaptive filter circuit

Alarm Processing Method and Apparatus

Transmission device interconnection registration device, transmission device interconnection registration method, and program

Systems and methods for measurement of optical parameters in an optical network

Communication control method and communication control apparatus

Intelligent real-time full-field measurement method and system for high-repetition-rate femtosecond pulse

DEVICES, SYSTEMS, AND METHODS FOR PROCESSING OPTICAL COMPONENTS

Tap centerer method and structure for coherent optical receiver

Reacquiring communication link based on historical data

Communication apparatus identification device, optical fiber connection system, communication apparatus identification method, and optical fiber connection method

Optical transmission characteristics compensating method and optical transmission characteristics compensating system

OPTICAL ADD/DROP MULTIPLEXER AND OPTICAL TRANSMISSION METHOD

Optical receiver including constrained frequency-domain circuitry with adaptive equalization

Optical transmission apparatus, optical transmission method, and program

Systems and methods for measurement of optical parameters in an optical network

Optical transmission system and optical transmission method

MONITORING MULTIPLE PASSIVE OPTICAL NETWORKS

Optical transmission system and failure diagnosis method for optical transmission system

Time comparison system, time comparison device, and time comparison method

Wavelength monitoring circuit

Fibre-based communication

Systems and methods for measurement of optical parameters in an optical network

Optical transmission system and bandwidth allocation method

Optical/RF wireless hybrid communication system and a control method

Optical network device with abnormal light emission detection

Measuring fiber asymmetry

Tap centerer method and structure for coherent optical receiver

Tap stabilizer method and structure for coherent optical receiver

System and method of monitoring base station signal

Reacquiring communication link based on historical data

Optical network performance evaluation using a hybrid neural network

Optical signal control device and optical communication system

Optical transmission system and communication condition selection method

Distributed sensor system

Work machine

Optical receiver and optical reception method

Time synchronization method, apparatus, and system

Coherent sampling

Optical communication link identifier

Methods and Apparatus for Detecting a Fault in an Optical Communication Network

Method and device for controlling downlink optical signal, and computer-readable storage medium

OPTICAL TRANSCEIVER WITH INTEGRATED OPTICAL LOOPBACK

Reacquiring communication link based on historical data

Methods and apparatus for adaptively detecting signal degradation in an optical communication system using the pre-forward error correction bit error rate

Reduced complexity constrained frequency-domain block LMS adaptive equalization for coherent optical receivers

Systems and methods for communication link redundancy for distributed antenna systems

Method of selecting wideband multimode fiber from 850 nm differential mode delays

Node with combined optical and electrical switching

OSNR margin monitoring for optical coherent signals

Forward and backward propagation methods and structures for coherent optical receiver

G-OSNR estimation on dynamic PS-QAM channels using hybrid neural networks

Systems and methods for passive optical switching using MEMS mirror switches

Tap centerer method and structure for coherent optical receiver

Optical transmission line switching apparatus, optical transmission system, and transmission line switching method

Signal-to-noise ratio estimation method, optical transmission apparatus, and optical transmission system

Tap stabilizer method and structure for coherent optical receiver

Low loss optical monitors, optical monitor arrays and optical monitor patch-panels

Reception device, transmission device, optical communication system, and optical communication method

Optical space communication device and delay adjustment method

Detection method for electronic devices

Debugging method and device for operating point voltage of parallel MZI electro-opticalmodulator

Reduced complexity constrained frequency-domain block LMS adaptive equalization for coherent optical receivers

Monitoring system and monitoring method

Systems and methods for communication link redundancy for distributed antenna systems

Relay device, monitoring system and monitoring information transmission method

Polarization tracking device, optical receiving device, and polarization tracking method

Distributed sensor system

Communication method, cable modem terminal system, and cable modem

Signal detection device and signal detection method

Tap centerer method and structure for coherent optical receiver

Tap stabilizer method and structure for coherent optical receiver

Forward and backward propagation methods and structures for coherent optical receiver

Signal light interruption detection device, optical amplifier, optical wavelength multiplex transmission device, and optical wavelength multiplex transmission system

Sending control apparatus, sending control method, signal synthesis apparatus, signal synthesis method, signal transmission system, and signal transmission method

Systems and methods for communication link redundancy for distributed antenna systems

Auxiliary device for setting wavelength and method for setting optical wavelength of optical network unit

Method and apparatus for characterizing a dispersion of an optical medium

Method and optical link management function for obtaining optical power level for an optical link

Monitor device and monitor method for monitoring transmission line

Optical transceiver and control method for optical transceiver

Monitoring system for cold climate

Optical relay device, control method, and optical transmission system

Method for enhancing optical signal-to-noise ratio measuring precision by correcting spectral resolution

COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD FOR TRANSMITTING OPTICAL SIGNAL

Communication apparatus, communication method, and communication system

Remote programming and troubleshooting of pluggable optical transceivers

Optically-addressable optical switch

System performance prediction method and apparatus

Measuring apparatus and method of frequency response characteristic imbalance of optical receiver

OSNR margin monitoring for optical coherent signals

Optical-fiber link routing look-up method, fault detection method and diagnostic system

Method for adjusting LOS alarm decision threshold and optical module

Method and apparatus for automatic determination of a fiber type

PROCEDURES, APPARATUSES, SYSTEMS, AND COMPUTER PROGRAMS FOR PROVIDING OPTICAL NETWORK CHANNEL PROTECTION

Method and apparatus for detecting optical network unit, and passive optical network system

Resilient virtual optical switches over less reliable optical networks

Optical receiving device and method for controlling dispersion compensation amount

Optical signal-to-noise ratio measuring device and optical signal-to-noise ratio measuring method

Communication apparatus and carrier wave frequency control method

Optical cryptography systems and methods

Method for monitoring wavelength of tunable laser on user end by optical line terminal on local end

Apparatus and method for low latency, reconfigurable and picosecond resolution time controller

Optical channel telemetry

Failure analysis method and device

Collective acquisition-type photodetection device and photodetection method having a time delay adjustment unit wherein each time-adjusted optical signal train is photomixed with an optical frequency comb at different timings in a photomixer

Antenna switch control method for analog radio over fiber systems

Methods and apparatus for using an embedded optical signal source within an optical node to locate problematic optical spans

Optical power measurement in a passive optical network

OSNR margin monitoring for optical coherent signals

Method of transmitting an optical data signal via a fiber optical medium in opposite directions at the same carrier wavelength

Method and apparatus for monitoring a material medium

Optical receiver and optical transceiver

OPTICAL DEVICE

Tracking frequency conversion and network analyzer employing optical modulation

Method and apparatus for determining gain of raman optical amplifier and raman optical amplifier

Diagnostic port for inter-switch link testing in electrical, optical and remote loopback modes

Optical frequency shifter, single sideband modulator, and light insertion and branch apparatus

Method and apparatus for testing transmission lines normally propagating optical signals

Optical monitoring in an optical communications network

System and method for broadband signal disambiguation based on sub-sampled analog optical links employing sample rate modulation

Optical transmission system, transmitter, receiver, and optical transmission method

Optical branching unit and optical branching method

Apparatus and method for optical-network monitoring

Method and arrangement for monitoring optical transmission lines

Optical networking unit (ONU) packaging

Extended range electro-optic voltage accessory

Procedures, apparatuses, systems, and computer programs for providing optical network channel protection

Optical data transmission device

Method and apparatus for calculating nonlinear transmission impairment of optical fiber link

Drop discriminating network alarm system utilizing a single sensing fiber

Method for detecting fiber jumper connection and apparatus for detecting fiber jumper connection

FIBER MANAGEMENT SYSTEM AND METHOD THEREOF

Method and apparatus for testing transmission lines normally propagating optical signals

Communication light detecting structure, communication light detecting optical connector including the communication light detecting structure, and communication light detecting optical cable including the communication light detecting structure

Diagnostic port for inter-switch link testing in electrical, optical and remote loopback modes

Mitigating rogue optical network unit (ONU) behavior in a passive optical network (PON)

Adjusting carrier spacing in a channel

Method and apparatus for using credits to determine cable length

Signal level detect circuit with reduced loss-of-signal assertion delay

Method of eliminating offset in spot centroid due to crosstalk

Apparatus and a method

Training-assisted carrier frequency and phase recovery in digital coherent optical communication systems

Digital demodulator architecture

Method and algorithm for stabilizing the output state of an optical transceiver

Method and apparatus for detecting optical network unit, and passive optical network system

SCHEDULING METHOD, APPARATUS, AND SYSTEM FOR AVOIDING DUAL-END MONITORING CONFLICT FOR SUBMARINE CABLE OPTICAL LINE

Diagnostic port for inter-switch and node link testing in electrical, optical and remote loopback modes

Method of computing an effective bandwidth of a multimode fiber

Transponder, repeater, and terminal equipment

PASSIVE ARCHITECTURAL OPTICAL DISTRIBUTION NETWORK

Digital demodulator architecture

Joint switching method for an aggregation node, aggregation node and system

Method and apparatus for monitoring a material medium

Diagnostic port for inter-switch link testing in electrical, optical and remote loopback modes

Synchronizing phases of multiple opitcal channels

Apparatus and method for detecting optical energy in an optical fiber

Method and apparatus for testing transmission lines normally propagating optical signals

Fiber fuse detecting apparatus

Method and device for monitoring submarine cable system

Network security using optical attenuation data

Optical network, monitoring unit and monitoring method

System and method for optical transmission

Tunable optical discriminator

Method and apparatus for monitoring a material medium

Method and apparatus for identifying faults in a passive optical network

Method and apparatus for characterizing modulation schemes in an HFC network

N-way broadcast / narrowcast combiner

Identifying or locating waveguides

Method and apparatus for testing transmission lines normally propagating optical signals

Temperature compensation for transmission between nodes coupled by a unidirectional fiber ring

Measuring system and method for optical network

Optical network monitoring system and method

Method and apparatus for testing optical networks

Error propagation and signal path protection in optical network

Method, apparatus and system for the automatic provisioning of a network element

Optic power monitoring system

Systems and methods for fast end-to-end, bi-directional, fiber trunk certification

System and method for measurement of entangled photons wavefunctions

Active optical cable (AOC) device and operation control method thereof

Optical transceiver with integrated optical loopback

Reacquiring communication link based on historical data

Optical safety and connections discovery

Node configuration in optical network

Systems and methods for identifying a source of node return system degradation

Forward and backward propagation methods and structures for coherent optical receiver

Continuous carrier optical phase optometric measurement over coherent optical communication link

Power optimization in visible light communication positioning

Methods and apparatus for free-space undersea communications

Systems and methods for identifying a source of node return system degradation

Optical fiber signal quality measuring and reporting in aviation systems and related method

Method and apparatus for estimating optical power