Patents
Patents for H04B 10 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication (73,125)
08/1999
08/31/1999US5945668 Fiber optic system with open fiber safety interlock
08/31/1999CA2111450C High-power signals optical generator for telecommunication equipments
08/27/1999CA2242624A1 Method and device for receiving a phase-modulated light signal and for the detection of alignment errors
08/26/1999WO1999043121A2 Communications link optical amplification and dispersion compensation
08/26/1999WO1999043118A1 Dense wdm in the 1310nm band
08/26/1999WO1999043117A2 Upgradable, gain flattened fiber amplifiers for wdm applications
08/26/1999WO1999043115A1 Ring/mesh optical network
08/26/1999WO1999043108A1 Hybrid analog/digital wdm access network with mini-digital optical node
08/26/1999WO1999043107A1 Optical amplifier having an improved noise figure
08/26/1999WO1999043106A1 Method for transferring utility optical signals and optical-line network
08/26/1999WO1999042984A1 Light emitting diode dot matrix display system with audio output
08/26/1999WO1999042893A1 Tunable optical add/drop multiplexer
08/26/1999WO1999042874A1 Bi-directional dispersion compensator
08/26/1999WO1999042803A1 Branch line monitoring system and branch line monitoring method
08/26/1999DE19807069A1 Optical signal transmission method for optical information communications
08/26/1999CA2324417A1 Tunable optical add/drop multiplexer
08/26/1999CA2321500A1 Dense wdm in the 1310nm band
08/26/1999CA2320872A1 Upgradable, gain flattened fiber amplifiers for wdm applications
08/26/1999CA2320833A1 Ring/mesh optical network
08/26/1999CA2300941A1 Multiple-window dense wavelength division multiplexed communications link with optical amplification and dispersion compensation
08/26/1999CA2261981A1 A gain control arrangement and method
08/25/1999EP0938244A2 Optical wavelength multiplexing system having a redundant configuration
08/25/1999EP0938243A2 Optical switch
08/25/1999EP0938197A2 High capacity chirped-pulse wavelength-division multiplexed communication method and apparatus
08/25/1999EP0938196A2 Optical transmitter and optical transmitting apparatus using the same
08/25/1999EP0938195A2 Control signal transmission method and apparatus for optical transmission system
08/25/1999EP0938172A2 Article comprising an improved cascaded optical fiber raman device
08/25/1999EP0938169A2 Hight power multiwavelength light source
08/25/1999EP0938001A1 Dual window wdm optical fiber communication
08/25/1999EP0937346A1 Programmable wavelength router
08/25/1999EP0700608B1 Reduction of interferometric noise in an optical network
08/25/1999EP0664060B1 Apparatus for adapting an electrical communications port to an optical communications port
08/25/1999CN1226693A Signal transfer apparatus of computer
08/24/1999US5943636 Method and apparatus to calibrate and run optical delay devices
08/24/1999US5943456 Coarse wavelength division multiplexing optical system
08/24/1999US5943162 Optical amplifier, optical amplifying method and optical transmission system using the optical amplifier
08/24/1999US5943161 Wavelength conversion device employing Bessel beams with parallel polarization
08/24/1999US5943152 Laser wavelength control device
08/24/1999US5943151 Optical telecommunication system
08/24/1999US5943150 Massively parallel processor networks with optical express channels
08/24/1999US5943147 Telecommunication system and method for wavelength-division multiplexing transmissions with a controlled separation of the outgoing channels and capable of determining the optical signal/noise ratio
08/24/1999US5943146 Optical transmission system in which no arrival of a first light signal is notified from a first station to a second station by an alarm light signal multiplexed with a second light signal in wavelength
08/24/1999US5943124 Monitoring of an optical line
08/24/1999CA2163630C Frequency-selective optical switch using polarization rotation
08/23/1999CA2236521A1 Method and apparatus for measuring polarization mode dispersion of optical devices
08/23/1999CA2229219A1 Method and apparatus for measuring polarization mode dispersion of optical devices
08/19/1999WO1999041876A1 System, method and apparatus for secure transmission of confidential information
08/19/1999WO1999041868A1 Optical telecommunications networks
08/19/1999WO1999041858A1 Multiplexer and demultiplexer for single mode optical fiber communication links
08/19/1999WO1999041857A2 Optical telecommunications network
08/19/1999WO1999041856A1 Signal transmission circuit for probe
08/19/1999WO1999041855A2 Optical transmission system with a receiver using full optical clock recovery
08/19/1999WO1999033295A8 System for transporting frequency hopping signals
08/19/1999WO1999031885A3 Reference signal generator for catv return path
08/19/1999WO1999031830A3 Optical receiver including a transimpedance amplifier and a photodetector
08/19/1999DE19808943C1 Optical fibre data transmission method
08/19/1999DE19806584C1 Bidirectional dispersion compensator
08/19/1999DE19805834A1 Optical transmitter-receiver component, e.g. for optical communications
08/19/1999CA2319412A1 Multiplexer and demultiplexer for single mode optical fiber communication links
08/18/1999EP0936773A1 Method and device for resynchronisation of optical signals
08/18/1999EP0936771A2 Optical signal translator unit
08/18/1999EP0936770A2 Wavelenght-division-mutliplexing optical communication apparatus
08/18/1999EP0936769A2 Wavelength-multiplexed optical transmission system
08/18/1999EP0936768A2 Optical wavelength multiplex device with add drop multiplexer
08/18/1999EP0936764A2 Method and apparatus for calibration of digital down converters in a signal processing system
08/18/1999EP0936762A1 Polarized light communication device, transmitter, laser, polarized light communication device for organism, reflected light detector and pulse wave detector
08/18/1999EP0936761A1 Wavelength division multiplexing optical transmission system
08/18/1999EP0936760A2 Optical transmission system and method of surveying the same
08/18/1999EP0936759A2 Optical transmission system, end terminal and optical receiver
08/18/1999CN1226314A Eye mask for measuring of distortion in optical transmission
08/18/1999CA2262248A1 Long reach delivery of broadcast services using broadband optical sources and pre-compensation of dispersion
08/17/1999US5940558 Optical packaging assembly for transmissive devices
08/17/1999US5940551 Optical NxN wavelength crossconnect
08/17/1999US5940549 Optical system and method using optical fibers for storage and retrieval of information
08/17/1999US5940209 Interactive optical fiber amplifier, system and method
08/17/1999US5940208 Switchable fiber optic device for fiber transmission system and components thereof
08/17/1999US5940207 Wavelength converter
08/17/1999US5940205 Channel counter and method of controlling an optical output level with same
08/17/1999US5940199 Interface unit and information processing apparatus having the interface unit
08/17/1999US5940197 Optical add-drop device
08/17/1999CA2118407C Optical clock recovery
08/16/1999CA2255127A1 Method for determining the orbital positions of satellites in leo networks
08/12/1999WO1999040697A1 Virtual star network
08/12/1999WO1999040696A1 Optical links
08/12/1999WO1999040695A1 Optical amplifier, method for controlling excitation light source in optical amplifier, and method for controlling the optical amplifier
08/12/1999WO1999027620A3 Monolithically integrated laser array
08/12/1999DE19801223A1 Method of deriving microwave or millimeter wave subcarrier signals independent of the dispersion of the optical transmission path in an optical multiplex system
08/12/1999CA2319482A1 Optical links
08/12/1999CA2259017A1 Procedure and device for resynchronizing optical signals
08/11/1999EP0935358A2 Bi-directional configurable optical add/drop circuit
08/11/1999EP0935357A2 Terminal apparatus, device for detecting the mismatching of work/protection line bridging function in a synchronous communication network and the method
08/11/1999EP0935356A2 System for monitoring a digital bidirectional optical communication line
08/11/1999EP0935355A2 A system and method for monitoring and characterizing optical links
08/11/1999EP0935320A1 Optical amplifier
08/11/1999EP0935146A2 Dispersion compensating fibers and systems
08/11/1999EP0859967B1 Low profile optical device with multiple mounting configurations
08/11/1999EP0643888B1 Optical communication system
08/11/1999CN1225767A Polarized light communication device, transmitter, laser, polarized light communication device for organism, reflected light detection and pulse wave detector
08/11/1999CN1225766A Telecommunications system simultaneous receiving and modulating optical signal
08/10/1999US5937126 Optically amplifying/repeating transmission system and optical amplifier