METHOD AND APPARATUS FOR REGULATING POWER SUPPLIED BY A LOCAL OSCILLATOR SOURCE IN AN OPTICAL MODEM

MULTI-INPUT COHERENT OPTICAL RECEIVER

WAVELENGTH MULTIPLEXING OPTICAL TRANSMISSION SYSTEM AND WAVELENGTH MULTIPLEXING OPTICAL TRANSMITTER

SIGNAL PROCESSING CIRCUIT, OPTICAL SIGNAL RECEIVING DEVICE, AND SIGNAL PROCESSING METHOD

APPARATUS FOR QUANTUM KEY DISTRIBUTION TRANSMISSION/RECEPTION BASED ON MULTI-PROTOCOL

SYSTEM, METHOD, AND DEVICE FOR HYBRID PHASE DELAY

FREE SPACE OPTICAL COMMUNICATIONS TERMINAL

COHERENT OPTICAL TRANSMISSION SYSTEM WITH MULTI-USE LASER EMITTER AND OPTICAL TRANSCEIVER THEREOF

OPTICAL WIRELESS COMMUNICATION APPARATUS

OPTICAL TRANSCEIVER MODULE AND OPERATING METHOD THEREOF

REDUNDANCY LINKS, RESILIENCY ARCHITECTURES, AND PROTECTION METHODS FOR PASSIVE OPTICAL NETWORKS

DATA TRANSMISSION METHOD, ETHERNET DEVICE, AND OPTICAL PASSIVE SWITCHING SYSTEM

OPTICAL TRANSMITTER, OPTICAL RECEIVER, OPTICAL COMMUNICATION SYSTEM AND CONTROL SIGNAL SUPERIMPOSITION METHOD

OPTICAL SIGNAL PROCESSING DEVICE, TAP COEFFICIENT UPDATE METHOD, PROGRAM, AND OPTICAL SIGNAL PROCESSING SYSTEM

POLARIZATION-MULTIPLEXED OPTICAL BI-DIRECTIONAL LINKS USING SYMMETRICAL HARDWARE

System and Method For Coherent Receivers With PCSELS Emitting In Two Directions

ELECTRICAL DEMULTIPLEXING FOR HOMODYNE DUAL-POLARIZATION (DP) OPTICAL COMMUNICATION SYSTEMS

MULTI-CARRIER TRANSMITTER WITH INTEGRATED MULTIPLEXER AND RECEIVER WITH INTEGRATED DEMULTIPLEXER

OPTICAL MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) RECEIVER USING STOKES VECTOR MEASUREMENTS

OPTICAL MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) DEMULTIPLEXERS

BI-DIRECTIONAL AND MULTI-CHANNEL OPTICAL MODULE WITH SINGLE CAVITY ACCOMMODATING BOTH OPTICAL TRANSMITTER AND RECEIVER ASSEMBLIES

ELECTRONIC DEMULTIPLEXING FOR DUAL-POLARIZATION (DP) INTENSITY-MODULATED DIRECT DETECTION (IMDD) OPTICAL COMMUNICATION SYSTEMS

OPTICAL DEVICE, OPTICAL RECEIVER, AND OPTICAL TRANSCEIVER

Dual-Output Coherent Optical Technology

RF SIGNAL TRANSMISSION OVER A LOW NOISE FACTOR FIBER

DIGITAL SIGNAL PROCESSING CIRCUIT, METHOD, RECEIVER, AND COMMUNICATION SYSTEM

FABRICATION TOLERANT WAVELENGTH DEMULTIPLEXER RECEIVER

OPTICAL RECEIVING DEVICE

ELECTRICAL-TO-COHERENT OPTICAL-TO-ELECTRICAL DATA COMMUNICATION CABLE ASSEMBLY

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION SYSTEM

NTEGRATED COHERENT RECEIVER HAVING A SINGLE MMI COUPLER OPTICAL HYBRID, NON-INTERSECTING OPTICAL PATHS AND UNIFORM ELECTRICAL PATHS

RECEIVING APPARATUS AND RECEIVING METHOD

Optical time-domain reflectometer (OTDR) including channel checker

APPARATUSES AND METHODS FOR ENHANCING FLEXIBILITY AND CAPACITY IN A PROVISIONING OF COMMUNICATION SERVICES UTILIZING A FIBER MEDIUM

NETWORK PROBING INCLUDING SPLIT LIGHT SIGNAL MONITORING

Systems and methods for detecting a location of the optical elements causing multipath interference in an optical link

WAVELENGTH MULTIPLEXING OPTICAL TRANSMISSION SYSTEM AND WAVELENGTH MULTIPLEXING OPTICAL TRANSMITTER

FREE SPACE OPTICAL COMMUNICATIONS TERMINAL

OPTICAL TRACKING MODULE CHIP FOR WIRELESS OPTICAL COMMUNICATION TERMINAL

Integrated self-coherent receiving optical chip based on round-trip delay interferometers

COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, STORAGE MEDIUM, AND COMMUNICATION METHOD

Multi-carrier transmitter with integrated multiplexer and receiver with integrated demultiplexer

MULTI-CARRIER TRANSMITTER WITH INTEGRATED MULTIPLEXER AND RECEIVER WITH INTEGRATED DEMULTIPLEXER

System for correcting phase noise and/or drift occurring in optical fibers

Metastructured photonic devices for binary tree multiplexing or demultiplexing of optical signals

Laserless optical transceiver

COHERENT RECEIVING DEVICE AND ANEMOMETRY LIDAR SYSTEM

INTEGRATED COHERENT RECEIVER FOR DISTRIBUTED FIBER SENSING APPARATUS

Optical multiple-input-multiple-output (MIMO) receiver using stokes vector measurements

Apparatuses and methods for optical code-delay reflectometry (OcoDR)

OPTICAL COMMUNICATION SYSTEM AND OPTICAL COMMUNICATION METHOD

Branch ratio setting system, method for producing optical communication system and optical branch device

PHOTONIC INTEGRATED CIRCUIT AND OPTO-ELECTRONIC SYSTEM COMPRISING THE SAME

Polarization-folding coherent optical technology for short reach optical communication

Optical transmission system and transmission quality monitoring method

Communication system, communication method, accommodation station device and base station device

Optical wavemeter

System, apparatus, and architecture for migrating an optical communication network

Apparatus and method for coherent optical multiplexing 1+1 protection

COHERENT OPTICAL RECEIVER DEVICE AND COHERENT OPTICAL RECEIVING METHOD

OPTICAL RECEPTION DEVICE AND OPTICAL TRANSMISSION AND RECEPTION DEVICE

SCALABLE RECEIVER ARCHITECTURE FOR SILICON PHOTONIC LINKS

OPTICAL TRANSMISSION SYSTEM AND DATA COMMUNICATION SYSTEM

Generation of entangled qubit states

Dual-output coherent optical technology

Self-coherent optical transmission system and receiver

Optical emission apparatus, optical communication system, and optical communication method

Communication system and OLT system

Optical transmission apparatus and optical transmission method

Communication system and ONU system

Digital Filter Arrangement for Compensating Group Velocity Dispersion in an Optical Transmission System

Polarization-fluctuation estimating device and polarization-fluctuation estimating method

Optical multiplexing/demultiplexing method, optical multiplexing/demultiplexing circuit, and manufacturing method thereof

Optical transmission apparatus and optical transmission method

Optical multiple-input-multiple-output (MIMO) demultiplexers

DUAL-POLARIZATION ROTATIONALLY-INSENSITIVE MONOSTATIC TRANSCEIVER WITH STANDARD FIBER

Optical tracking module chip for wireless optical communication terminal

SYSTEM AND METHOD FOR DIRECTIONALLY-DEPENDENT POLARIZATION MODIFICATION

Dual-polarization rotationally-insensitive monostatic transceiver with dual cladding fiber

Optical communication system and control method

POLARIZATION VARIATION MONITORING SYSTEM AND POLARIZATION VARIATION MONITORING METHOD

Port Detection Method and Apparatus

OPTICAL SIGNAL TRANSMISSION METHOD, APPARATUS, AND DEVICE

Fiber branch structure for spatial optical communication and optical communication system equipped with same

Optical transmission system and optical transmission method

FREE SPACE OPTICAL COMMUNICATION TERMINAL AND METHOD

Fault locating method, apparatus, and system

Wavelength-division multiplexing visible-light communication and lighting device and method

Optical coherent transceiver and filter adjustment method

Signal reconstruction

Optoelectronic transmitter with phased array antenna comprising an integrated control device

Optical switch and optical performance monitoring method based on optical switch

Leveraging coherent detection to measure performance of optical transmitter

Port-identified optical signal splitter

Mitigation of equalization-enhanced phase noise in a coherent optical receiver

Optical receiving apparatus, optical transmission system, optical transmission method and computer program

Wavelength division multiplexing structure

Asymmetric bidirectional optical wireless communication system based on orbital angular momentum

Optical receiver

Coherent optical receiving apparatus and optical system that uses coherent optical receiving apparatus

OPTICAL REPEATER AND OPTICAL COMMUNICATION SYSTEM

Scalable, ultra-low-latency photonic tensor processor

Systems and methods for sensing fiber optic cables of access networks

CENTRAL UNIT, REMOTE UNIT, SMALL CELL SYSTEM, AND COMMUNICATION METHOD

STATE OF POLARIZATION SENSITIVE COHERENT OPTICAL TIME DOMAIN REFLECTOMETRY

CENTRAL UNIT AND REMOTE UNIT

Optical transmission system

System, apparatus, and architecture for migrating an optical communication network

Polarization-folding coherent optical technology for short reach optical communication

Quantum communications system having stabilized quantum communications channel and associated methods

Balanced photonic architectures for matrix computations

Multi-point self-calibration for broadband optical sensor interrogator

Wavelength demultiplexer, optical transceiver front-end module, photonic circuit, and wavelength demultiplexing control method

Optical device

Out-of-band communication channel for sub-carrier-based optical communication systems

System and method for multiplexed optical addressing of atomic memories

Dual polarization unit for coherent transceiver or receiver

Phase coder-decoder for quantum key distribution, and corresponding codec apparatus and system

Continuous-variable quantum key distribution (CV-QKD) method and system

Device for coherently detecting in a simplified way and without optical loss

Signal processing apparatus and signal processing method

Individually routable subcarriers

Individually routable subcarriers

Optical semiconductor device

Receiving device and receiving method

Method for receiving and sending signal in optical communication, optical transceiver, and system

Polarization-diversity Kramers-Kronig heterodyne receiver and method

Media-based reconfigurable intelligent surface-assisted modulation

Rapid polarization tracking in an optical channel

Free space optical communication terminal with actuator system and optical relay system

Free space optical communication terminal with dispersive optical component

Communication system multiplexing and demultiplexing apparatus and methods

OAM measurement device independent quantum key distribution system based on real-time tracking compensation and method thereof

Optical module

Spatial optical transmitter and spatial optical communication system

Coherent Optical Receiving Apparatus and Optical Signal Demodulation Apparatus

Frequency agile microwave radiometer, hyperspectral microwave radiometer and methods of operation

Optical signal transmission system and optical signal transmission method

Integrated coherent receiver for distributed fiber sensing apparatus

Coherent detection implementing apparatus, system and method

Polarization processing apparatus, optical transceiver, and optical polarization processing method

Coherent optical receiver device and coherent optical receiving method

Optical receiver and receiving method

System and methods for cable fiber node splitting using coherent optics

Optical receiver, light signal receiving method, and data reproduction device

Optical transceiver and optical transmission/reception method

Kramers-Kronig receiver

Hub-leaf laser synchronization

Hub-leaf laser synchronization

Signal processing device and signal processing method

Optical transmission/reception unit and apparatus for signal transfer

Reflection-type coherent optical communication system combined with unidirectional optical signal amplification

Free-space optical communication apparatus

Efficient multi-mode DFE

Coherent optical receiver

Out-of-band communication channel for sub-carrier-based optical communication systems

Out-of-band communication channel for sub-carrier-based optical communication systems

Out-of-band communication channel for sub-carrier-based optical communication systems

Out-of-band communication channel for sub-carrier-based optical communication systems

Systems and methods for analog electronic polarization control for coherent optical receivers

Coherent optical receiver device and coherent optical receiving method

Individually routable digital subcarriers

Dimensional transformation in optical communication

Generation of entangled qubit states

Optical sensor systems

Optical transceiver and optical transmission/reception method

Channel diagnostics based on equalizer coefficients

TRANSMISSION METHOD AND SYSTEM FOR IMPROVED UNIDIRECTIONAL OR BIDIRECTIONAL DATA TRANSMISSION OVER TELECOMMUNICATION NETWORK, POLARIZATION ATTRACTOR CIRCUIT, COMPUTER PROGRAM AND COMPUTER PROGRAM PRODUCT

Optical signal transmission system and optical signal transmission method

Optical communication systems, devices, and methods including high performance optical receivers

OPTICAL DELAY LINES FOR ELECTRICAL SKEW COMPENSATION

Rx delay line inteferometer tracking in closed-loop module control for communication

Methods and apparatus for improving the skew tolerance of a coherent optical transponder in an optical communication system

PHASE DEMODULATION METHOD AND CIRCUIT

System and methods for cable fiber node splitting using coherent optics

Assembly method for coherent receiver

Optical receiver and coherent optical reception method

Adaptive digital filtering in an optical receiver

Coherent optical receiver device and coherent optical receiving method

Optical communication systems, devices, and methods including high performance optical receivers

Coherent optical communication with constellations having coordinates on circles

Methods and apparatus for improving the skew tolerance of a coherent optical transponder in an optical communication system

Clock recovery for band-limited optical channels

Coherent receiver module

AMPLITUDE COHERENT DETECTION FOR PULSE AMPLITUDE MODULATION SIGNALS

Balanced optical receivers and methods for detecting free-space optical communication signals

Transmission apparatus and transmission method

Frequency agile microwave radiometer, hyperspectral microwave radiometer and methods of operation

Dynamic range for a heterodyne optical channel monitor

Optical device, and optical communication module using the same

Optical modules having an improved optical signal to noise ratio

RX delay line inteferometer tracking in closed-loop module control for communication

Coherent detection with remotely delivered local oscillators

Receiver and data receiving method

Construction method of mode-division multiplexing fiber-optic communication system and a constructed fiber-optic communication system

Channel diagnostics based on equalizer coefficients

Kramers-Kronig receiver

Self-homodyne carrier multiplexed transmission system and method for coherent optical links

Wavelength division multiplexed optical parameter detection receiver

Trellis based processing for robust digital multiband transmission

Optical circuit

Individually routable digital subcarriers

Wavefront shaping with coherent optical sensing

SYSTEM AND METHOD FOR HIGH SPEED SATELLITE-BASED FREE-SPACE LASER COMMUNICATIONS USING AUTOMATIC GAIN CONTROL

Phase demodulation method and circuit

Optical signal reception apparatus, optical communication system, and method of generating compensation signal of optical signal reception apparatus

Common mode rejection ratio measurement device for coherent optical receiver, and measurement method

Method and apparatus for monitoring polarization dependent loss, receiver and communication system

Optical delay lines for electrical skew compensation

Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatus

System for optical linear sampling and coherent detection of an optical signal

Quantum signal detection method and quantum signal detection apparatus

Rx delay line inteferometer tracking in closed-loop module control for communication

Original key recovery apparatus and method

Optical receiver and method of assembling the same and providing rotational alignment

Optical communication system, optical receiver, optical receiver control method, and non-transitory computer readable medium

Coherent optical receiver device and coherent optical receiving method

System and method for coherent detection with digital signal procession

Optical communication systems, devices, and methods including high performance optical receivers

Nonlinear tolerant constant modulus multi-dimensional modulation formats for coherent optical communication systems

Multiple polarization fiber optic telemetry

Polarization analyzer based detection schemes for pol-mux self-coherent single sideband optical transmission

Optical transceiver

Optical relaying apparatus, optical transmission system, and optical-signal reproducing and relaying method

System and method for polarization multiplexed optical communications

System and methods for cable fiber node splitting using coherent optics

Phase demodulation method and circuit

Polarization insensitive self-homodyne detection receiver for spatial-division multiplexing systems

Compensation apparatus for offset drift, received signal recovery apparatus and receiver

Polarization insensitive self-homodyne detection receiver

Amplitude adjustment circuit, digital coherent receiver, and amplitude adjustment method

Channel diagnostics based on equalizer coefficients

Joint source and LDPC coding based coding modulation for ultra-high-speed optical transport

Signal processing apparatus and method for transmitting and receiving coherent parallel optical signals

Measurement method and apparatus for a residual direct-current component and system

Measurement method and apparatus for residual direct-current components and a system

Transmission apparatus, transmission system and data detection method

Self-coherent robust spectrally efficient optical transmission systems

Methods for compensation of cross-polarization modulation (XPolM) impairments in coherent optical communications

Fading mitigation of turbulent channel based on polarization diversity in coherent optical receivers

COHERENT RECEIVER

Extended branching device and control method of the same

Signal processing device used in optical receiver and signal processing method

Optical receiver with optical transmitter-specific dispersion post-compensation

PROCESS OF ASSEMBLING COHERENT OPTICAL RECEIVER

System and method for high speed satellite-based free-space laser communications using automatic gain control

Wavelength division multiplexing optical receiver and driving method for same

Fading mitigation of the turbulent channel based on polarization diversity in coherent optical receivers

Polarization dispersion adder and optical receiver

Optical receiver and optical axis alignment method thereof

Optical communication with some compensation of nonlinear optical effects

System and method for optical receiver

SYSTEM AND METHOD FOR COHERENT DETECTION WITH DIGITAL SIGNAL PROCESSION

Polarization demultiplexing of optical signals

Polarisation-independent coherent optical receiver

Clock recovery method and clock recovery arrangement for coherent polarization multiplex receivers

Optical component

Clock recovery for optical transmission systems

Three port transceiver

Methods and systems for optical detection

Polarization state aligner (PSA)

Receiving method and receiver device for a coherent optical communication system

Optical communication system, optical receiver, optical receiver control method, and non-transitory computer readable medium

Optimization of optical transmission capacity

Chromatic dispersion estimation for digital coherent optical receivers

Optical receiver with optical transmitter-specific dispersion post-compensation

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

Self-coherent robust spectrally efficient optical transmission systems

Recovering data from quadrature phase shift keying modulated optical signals

Signal processing device, optical communication system, and signal processing method

Signal processing device and signal processing method

Polarization division multiplexing optical communication reception device, polarization division multiplexing optical communication system, and polarization division multiplexing optical communication method

Tracking nonlinear cross-phase modulation noise and linewidth induced jitter in coherent optical fiber communication links

Optical transceiver having auxiliary area to install Mach-Zehnder modulator

Clock recovery method and clock recovery arrangement for coherent polarization multiplex receivers

Polarization state detector, optical transmitter, and optical receiver

Coherent optical receiver device and coherent optical receiving method

System and method for 400G signal generation and coherent detection

Optical receiver and signal processing method for optical receiver

Optical receiver circuit

Optical receiver and optical receiving method

Polarization demultiplexing of optical signals

Optical receiving apparatus, optical transmitter and receiver module, and optical transmitting and receiving apparatus

SYSTEM AND METHOD FOR IN-BAND AMPLITUDE-MODULATED SUPERVISORY SIGNALING FOR POLARIZATION-MULTIPLEXED SYSTEMS

Receiver, transmission system, method for receiving polarization multiplexed optical signal, and non-transitory computer readable medium storing receiver control program

Frequency synchronization for an OFDM optical receiver

Optical 90-degree hybrid circuit and optical receiver using same

Optical bandwidth interleaving

Combining I-Q and/or PolMux optical receiver to enable single detector

Light transmission apparatus, light communication system, light reception apparatus, method for adjusting light transmission, method for transmitting light, and method for receiving light

NONLINEAR CROSS-POLARIZATION MITIGATION ALGORITHM

Optical transmitter, optical communication system, and optical communication method

Polarization beam combiner/splitter, polarization beam combining/splitting structure, light mixer, optical modulator module, and method for manufacturing polarization beam combiner/splitter

Identification, alignment and cross polarization optimization for orthogonal polarized transmission and relay systems

Optical receiver and optical axis alignment method thereof

Symbol timing estimation for coherent polarization multiplex optical receivers

Method and system for common-mode-rejection-ratio (CMRR) characterization of an integrated coherent receiver

Optical transmitting apparatus and optical detecting apparatus

Optical receiver and method for manufacturing the same

Signal processing apparatus and signal processing method