OPTICAL TRANSMISSION SYSTEM, SIGNAL QUALITY MEASUREMENT APPARATUS AND SIGNAL QUALITY MEASUREMENT METHOD

Network system modeling using nested models combining machine learning and behavioral approaches

RAMAN AMPLIFICATION DEVICE AND RAMAN AMPLIFICATION METHOD

Auto-squelching optical traffic channels in an ASE-loaded system

Auto-squelching optical traffic channels in an ASE-loaded system

Optical link optimization based on signal and interferer power discrimination

OPTICAL RECEPTION APPARATUS AND MONITOR SIGNAL GENERATING METHOD

Optical amplification estimation method, optical amplification estimation apparatus and computer program

Method and apparatus for calculating configuration of optical transmission network, and optical transmission network system

Handling band spectrum failures in a C+L band photonic line system

Apparatus and method of generating terahertz signal using directly-modulated laser

Network system modeling using nested models combining machine learning and behavioral approaches

Optical reception apparatus and monitor signal generating method

Detecting power of low-bandwidth and broad-bandwidth optical signals

Avoiding fiber damage on non-supervisory optical fiber links

System-level optical amplifier efficiency performance metric

Optical fiber characterization measurement systems and methods

Semiconductor optical amplifier with asymmetric Mach-Zehnder interferometers

Optical reception apparatus and monitor signal generating method

Optical transmission device and spectrum control method

Optical receiver module, optical receiving method, optical line terminal, PON system, and optical filter

Optical reception apparatus and monitor signal generating method

Quantum interference detection of optical frequency comb offset frequency

Multiplexed integrating amplifier for loss of signal detection

Distributed Raman amplifier systems

Transimpedance amplifier for receiving burst optical signal

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

Optical reception apparatus and monitor signal generating method

Signal processing apparatus, optical line terminal, and communications system

Excitation light source apparatus and gain equalizing method

Method and apparatus for measurement of a backscattered trace of a fiber

Techniques for high-resolution line monitoring with a standardized output and an optical communication system using the same

Harmonic generation and phase sensitive amplification using a bragg reflection waveguide

Distributed automatic power optimization system and method

Raman amplifier system and method with integrated optical time domain reflectometer

Monitoring optical fibre link

Optical reception apparatus and monitor signal generating method

Distributed raman amplifier systems

Method and apparatus for determining optical fibre characteristics

Harmonic generation and phase sensitive amplification using a bragg reflection waveguide

Triple output photodetector current replicator

Wavelength collision detection in carrier multiplexers

Techniques for variable forward error correction

Identifying a location in a network where noise is generated

Identifying a location in a network where noise is generated

Monolithic Integrated Laser Driver And Limiting Amplifier With Micro-Programmed Controller And Flash Memory On SOC For Fiber Optical Transceiver

Optical signal quality monitoring apparatus, optical signal quality monitoring method and optical repeater

Raman-based static and dynamic tilt control in an optical system

Distributed fiber optic sensing system and method based on stimulated brillouin scattering

Optical reception apparatus and monitor signal generating method

Apparatus for modular implementation of multi-function active optical cables

Optical transmitter and optical transmission method

Burst-mode receiver, and method of bias voltage control for APD of burst-mode receiver

Raman amplifier system and method with integrated optical time domain reflectometer

Transimpedance amplifier

Apparatus and method to calculate a noise figure of an optical amplifier for wavelength channels in a partial-fill scenario to account for channel loading

Wavelength multiplexer, and method and program for identifying failed portion

Identifying a location in a network where noise is generated

Optical transmission device and optical transmission method

Self-tuning an optical network at an operating point

Embedded apparatus to monitor simulated brillouin scattering from Raman amplifier in fiber optics transmission system

Adaptive optical amplifier for WDM systems

Optical amplifier controller

Method and apparatus for detection of failure of an optical amplifier

Raman amplifier system and method with integrated optical time domain reflectometer

Control circuit, control method, and transmission system

Optical amplifying apparatus and optical transmission system

Wavelength division multiplexing transmission device

Optical frequency locking method and device for optical data transmission

TRANSPONDER DEVICE, OPTICAL BRANCHING DEVICE, AND OPTICAL SIGNAL TRANSMISSION METHOD IN OPTICAL TRANSPORT NETWORK NODE

Apparatus and method to calculate a noise figure of an optical amplifier for wavelength channels in a partial-fill scenario to account for channel loading

Optical amplification apparatus, method for controlling same, optical receiver station, and optical transmission system

Optical node apparatus, method for checking connection in node apparatus and program thereof

Optical branching unit, optical communication system, and optical multiplexing method

Method and apparatus for gain tilt compensation over fiber optic cable

Optical relay system and network control device

Optical transmission apparatus and continuity testing method

OPTICAL REPEATER, OPTICAL TRANSMISSION APPARATUS, REFLECTION ABNORMALITY DETECTION METHOD AND REFLECTION ABNORMALITY RECOVERY DETERMINATION METHOD

System and method of Raman amplifier pump control

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

Optical transmission apparatus and fault detection method

Input signal detection device

Optical amplifier and abnormality detection method for the same

Monitoring method and apparatus of noise light due to Raman amplification and optical communication system using the same

Optical network monitoring using amplifier modeling

Method, apparatus and data carrier for compensating for channel depletion of a multi-channel signal in an optical link or optical network

Optical amplifier pre-emphasis and equalization method and optical communications system incorporating same

Determination of the amplified spontaneous emission in an optical fibre amplifier

Multimode fiber optic amplifier and method of amplifying optical signals

Method and system for improved eye protection safety of high output power lumped optical amplifiers

Optical transmission apparatus with automatic gain control and automatic level control mode selection

Multimode fiber optic amplifier and method of amplifying optical signals

Method, apparatus, and system for evaluating faulty point in multi-stage optical amplifying and repeating transmission line

Optical amplifier with pump light source control for Raman amplification

Control method and control apparatus of optical device

Gain monitoring method for optical amplifier and apparatus thereof

Optical performance monitoring using a semiconductor optical amplifier

Optical amplifier with pump light source control for Raman amplification

Semiconductor optical amplifier with asymmetric Mach-Zehnder interferometers

Optical fiber characterization measurement systems and methods

Optical module and circuit and method to control the same

Communication link control using communication interface and programmable logic circuitry