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)
12/2002
12/17/2002US6496121 Methods and apparatus for an electronic shelf label communication system
12/17/2002US6496079 Optical to microwave converter using direct modulation phase shift keying
12/17/2002US6496070 Buffer circuit comprising load, follower transistor and current source connected in series
12/17/2002US6494370 Electro-optic system controller and method of operation
12/17/2002CA2323744C Method and apparatus for improving spectral efficiency in wavelength division multiplexed transmission systems
12/17/2002CA2209144C Variable attenuator
12/17/2002CA2195034C Method of identifying faults in wdm optical networks
12/17/2002CA2193754C Synchronous polarization and phase modulation using a periodic waveform with complex harmonics for improved performance of optical transmission systems
12/13/2002CA2390586A1 Network operating system with topology autodiscovery
12/13/2002CA2353767A1 System for controlling an electrical device
12/12/2002WO2002100015A1 Optical temporal demultiplexer
12/12/2002WO2002100007A2 Device for hybrid connection between optical fibres and lines transporting electric signals, and network incorporating same
12/12/2002WO2002100006A1 Device and method for monitoring signal characteristics of optical signals in an optical communications network
12/12/2002WO2002099939A2 Optical frequency synthesizer
12/12/2002WO2002099483A1 Chromatic dispersion and dispersion slope control
12/12/2002WO2002099468A2 Device and method for monitoring optical signals with increased dynamic range
12/12/2002WO2002099368A1 Optical channel monitor
12/12/2002WO2002071662A3 Method and apparatus for detection and compensation of pmd parameters in signals transmitted over optical fiber links and system of communication therewith
12/12/2002WO2002048991A9 Method for determining current location-specific information of individuals, transmitting-receiving system, and receiver for carrying out the method
12/12/2002WO2001093464A9 Device and method for monitoring signal direction in an optical communications network
12/12/2002US20020188787 Computer including installable and removable cards, optical interconnection between cards, and method of assembling a computer
12/12/2002US20020188656 Combining specialized, spatially distinguished, point to point communications with other wireless networking communications to provide networking configuration in classroom-like settings
12/12/2002US20020187809 Method and apparatus for multiplexing in a wireless communication infrastructure
12/12/2002US20020187796 Economical extension of the operating distance of an RF remote link accommodating information signals having differing carrier frequencies
12/12/2002US20020187754 Modulator for high data rate wireless communication
12/12/2002US20020186946 Dispersion compensating module and mode converter, coupler and dispersion compensating optical waveguide therein
12/12/2002US20020186929 Tunable dispersion compensation device, optical receiver, and optical fiber communication system
12/12/2002US20020186916 Compensation for polarization mode dispersion in single mode fiber
12/12/2002US20020186725 Wavelength group wavelength converter and wavelength group exchange using the same
12/12/2002US20020186674 Method and apparatus for multiplexing in a wireless communication infrastructure
12/12/2002US20020186460 Variable gain optical amplifier and control method
12/12/2002US20020186459 Method and system for controlling amplifier power in an optical communications network
12/12/2002US20020186458 Dynamically controlled optical amplifier module
12/12/2002US20020186456 Raman amplifier, raman amplifier control method, and optical communication system
12/12/2002US20020186445 RF combiner based on cascaded optical phase modulation
12/12/2002US20020186439 Wavelength division multiplexed (WDM) ring passive optical network (PON) with route protection for replacement of splitter based passive optical networks
12/12/2002US20020186438 Tunable dispersion compensator
12/12/2002US20020186436 Method and apparatus for multiplexing in a wireless communication infrastructure
12/12/2002US20020186435 System and method for orthogonal frequency division multiplexed optical communication
12/12/2002US20020186428 Crosstalk path enumeration in optical networks
12/12/2002US20020186094 Optical to microwave converter using direct modulation phase shift keying
12/12/2002US20020185588 Semitransparent optical detector on a flexible substrate and method of making
12/12/2002CA2389505A1 Optical communication link
12/11/2002EP1265383A2 Optical transmission system
12/11/2002EP1265382A2 Optical transmission system for high bitrate optical signals with dispersion compensation means
12/11/2002EP1265381A2 Raman amplifier and control method
12/11/2002EP1265380A2 Optical communication apparatus, system and method that compensate for chromatic dispersion
12/11/2002EP1264426A1 Raman amplifier system
12/11/2002EP1264425A1 Method and system for amplitude modulation of an optical signal
12/11/2002EP1264424A2 Method and apparatus for interleaved optical single sideband modulation
12/11/2002EP1264372A2 Fiber amplifier with constant gain
12/11/2002EP0956663B1 Ratiometric compensated optical isolation coupler
12/11/2002CN2525743Y Flat top high density wave division somplex device
12/11/2002CN2525742Y Novel interleaver device
12/11/2002CN2525542Y 双工聚焦装置 Duplex focusing device
12/11/2002CN1384621A Speeding, efficient-raising and dilatating method for quantum cipher key distribution
12/11/2002CN1384620A Implementation of data transmission between optical link terminal and optical network unit
12/11/2002CN1384619A Implementation of dynamic bandwidth distribution of passive optical network in asynchronus transfer mode
12/11/2002CN1384618A Optical path establishing method for automatically exchanging optical network
12/11/2002CN1096137C Optical pulse sequence generator
12/11/2002CN1095998C Tunable filtering device for optical communications
12/11/2002CA2389937A1 Multi-pass configurations
12/10/2002US6493494 Dispersion compensating fiber for wavelength division multiplexed optical fiber transmission systems using dispersion shifted fiber as line fiber
12/10/2002US6493490 Method and apparatus for receiving and aligning an optical communications beam with an integrated
12/10/2002US6493350 Transmission control method in a network system for interactively transmitting a signal between node devices and network system using the same
12/10/2002US6493133 System and method for increasing capacity of undersea cables
12/10/2002US6493131 Wavelength-locking of optical sources
12/10/2002US6493127 Modulation systems using dual channel optical modulators
12/10/2002US6493125 Apparatus for stabilizing light source frequency
12/10/2002US6493123 Modulated-retroreflector based optical identification system
12/10/2002US6493122 Optical space communication apparatus
12/10/2002US6493121 Bidirectional module for multichannel use
12/10/2002US6493120 Optical fiber-delay line buffers with void filling
12/10/2002US6493119 Scalable DWDM network switch architecture with wavelength tunable sources
12/10/2002US6493117 WDM optical network with passive pass-through at each node
12/10/2002US6493116 PMD characterization across multiple optical channels of an optical link
12/10/2002US6492650 Sensor unit for use in a multiple sensor unit array
12/10/2002CA2245303C Method and apparatus for automatic compensation of first-order polarization mode dispersion (pwd)
12/10/2002CA2197916C Optical transmitter and transceiver module for wireless data transmission
12/05/2002WO2002098037A1 Optical firewall
12/05/2002WO2002098027A1 Optical pulse transmission lines
12/05/2002WO2002098026A1 Integrated double pass equalizer for telecommunications networks
12/05/2002WO2002098025A1 Method and system for a polarization mode dispersion tolerant optical homodyne detection system with optimized transmission modulation
12/05/2002WO2002097477A2 High gain semiconductor optical amplifier with low noise
12/05/2002WO2002097476A2 Point-to-multipoint passive optical network that utilizes variable-length packets and variable-length upstream tine slots
12/05/2002WO2002079813A3 Semiconductor quantum dot optical amplifier, and optical amplifier module and optical transmission system using the same
12/05/2002WO2002061988A3 Polarization mode dispersion compensator based on rotating micro-mirrors
12/05/2002WO2002039625A9 Compensation of laser chirp in fiber systems
12/05/2002US20020183002 Switched laser array modulation with integral electroabsorption modulator
12/05/2002US20020181907 Dispersion managed cable for WDM systems
12/05/2002US20020181879 Chromatic dispersion compensation and dispersion slope compensation method and apparatus
12/05/2002US20020181878 Dynamic chromatic dispersion control using coupled optical waveguides
12/05/2002US20020181869 Tunable dispersion compensator
12/05/2002US20020181867 Optical power equalizer
12/05/2002US20020181860 Chromatic dispersion control method and apparatus
12/05/2002US20020181833 Active waveshifting
12/05/2002US20020181668 Method and system for radio frequency/fiber optic antenna interface
12/05/2002US20020181522 Laser diode matching circuit and method of impedance matching therefor
12/05/2002US20020181520 Semiconductor laser driving circuit
12/05/2002US20020181518 Method for driving a semiconductor light source device for transmitting a signal while suppressing dynamic wavelength variation during fast modulations, semiconductor light source device, and optical communication method and system using the same