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)
02/2002
02/12/2002US6347008 Optical amplifier system and optical network having flattened gain and constant per channel output power
02/12/2002US6347006 Control for periodic optical filter
02/12/2002US6347001 Free-space laser communication system having six axes of movement
02/12/2002US6346711 High-speed optocoupler driver
02/12/2002US6346702 Fiber bragg grating peak detection system and method
02/12/2002CA2256188C Opto-electronic frequency divider circuit and method of operating same
02/12/2002CA2096229C Optical mixing device
02/09/2002CA2351012A1 Raman-amplified optical transmission system
02/07/2002WO2002011354A1 Synchronizer for rz-wdm signals and method for synchronization
02/07/2002WO2002011340A1 Local access fiber optics communication system
02/07/2002WO2002011339A2 Multiplexer, demultiplexer and add/drop multiplexer for single mode optical fiber communication links
02/07/2002WO2002011338A1 Wavelength division multiplex optical transmitter
02/07/2002WO2002011337A1 Optical wavelength division multiplexing device
02/07/2002WO2002011336A1 Wavelength division multiplex (wdm) optical network
02/07/2002WO2002011322A2 Suppression of stimulated brillouin scattering in optical transmissions
02/07/2002WO2002011321A2 Multichannel system analyzer
02/07/2002WO2002011320A2 Smart connect
02/07/2002WO2002011319A1 Method and apparatus for tone tracking in wireless optical communication systems
02/07/2002WO2002011318A1 Method for creating providers for data transfer networks
02/07/2002WO2002011298A2 Method and apparatus for polarization tracking in wireless optical communication systems
02/07/2002WO2002011296A2 A fault protection scheme
02/07/2002WO2002010811A2 Polarization mode dispersion generator
02/07/2002WO2002010808A1 System and method for using a holographic optical element in a wireless telecommunication system receiver
02/07/2002WO2001065731A3 Optical isolation apparatus and method
02/07/2002WO2001054316A3 Method for determining the quality of data signals and for identifying parasitic signals in optical transmission networks
02/07/2002US20020015569 Dispersion compensation fibre
02/07/2002US20020015553 Radiation power equalizer
02/07/2002US20020015551 Optical switch network, optical cross connecting device, and optical add/drop multiplexer
02/07/2002US20020015549 Tunable compensation for polarization-mode dispersion using a birefringent nonlinearly-chirped bragg grating in a dual-pass configuration
02/07/2002US20020015547 Compact multi-channel polarization mode dispersion compensator
02/07/2002US20020015477 Dynamic bandwidth allocation
02/07/2002US20020015221 Optical amplifier and optical transmission path
02/07/2002US20020015220 Cascaded pumping system and method for producing distributed raman amplification in optical fiber telecommunication systems
02/07/2002US20020015219 Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers
02/07/2002US20020015212 Multi-wavelength generating method and apparatus based on flattening of optical spectrum
02/07/2002US20020015210 Optical communications apparatus
02/07/2002US20020015208 Method and apparatus for optimizing SBS performance in an optical communication system using at least two phase modulation tones
02/07/2002US20020015207 Method and system for compensating chromatic dispersion
02/07/2002US20020015206 WDM system that uses nonlinear temporal gratings
02/07/2002US20020015202 Wavelength division multiplexing optical transmission method and system
02/07/2002US20020015201 Method and apparatus for extending fiber transmission distance with multiple pre-emphases in optically amplified DWDM system
02/07/2002US20020015200 System and method for monitoring and characterizing optical links
02/07/2002US20020015199 Method for controlling the signal/noise ratio of optical add/drop signals
02/07/2002DE10033820A1 Apparatus to emulate a polarization mode dispersion, of the second order, has a unit which can turn its main polarization axis between the output and input of a polarization splitter/combiner
02/07/2002CA2417928A1 Smart connect
02/06/2002EP1178698A2 Unused bandwidth allocation in passive optical networks
02/06/2002EP1178622A2 Wavelength division multiplexing optical transmission method and system
02/06/2002EP1178581A2 Method and apparatus for gain-assisted superluminal light propagation
02/06/2002EP1178580A1 Optical transmitter and optical transmission system comprising the same
02/06/2002EP1178535A2 Photodetector array and optical communication monitoring
02/06/2002EP1178457A1 Contiguously mountable sensor unit
02/06/2002EP1178341A2 Optical bidirectional transmitter- and receiver-module having a rod body with integrated WDM-filter
02/06/2002EP1178339A2 Segmented waveguide for large diameter fiber optic rotary joint
02/06/2002EP1178338A2 Parallel data transmission through segmented waveguides of large diameter
02/06/2002EP1177470A1 Dispersion compensation by using tunable nonlinearly-chirped gratings
02/06/2002CN2476140Y Talkback microphone device for learning foreign language
02/06/2002CN1335012A System and method for dial-up networking over infrared data link
02/06/2002CN1334949A Concurrent display and data communicating system and method using LEDs
02/06/2002CN1334665A Method and system for providing end-to-end protection in point-to-multipoint access-to network
02/06/2002CN1334652A 光数据传送装置 Optical data transfer means
02/06/2002CN1078992C Circuit of duplexing supervisory control modules for use in data transmission system
02/06/2002CN1078989C Optical wavelelngth multi plexing and demultiplexing device and optical transmission system using same
02/05/2002US6345137 Wavelength division multiplex optical star coupler, communication station, and optical transmission system
02/05/2002US6345136 Tuneable add/drop multiplexer
02/05/2002US6344924 Optical fiber amplifier and output power flattening method of optical fiber amplifier
02/05/2002US6344923 Eliminating the Raman effect by modulating polarization
02/05/2002US6344922 Optical signal varying devices
02/05/2002US6344921 Optical parametric amplifiers and generators in optical communication systems
02/05/2002US6344919 Methods and systems for producing linear polarization states of light at the end of a length of optical fiber
02/05/2002US6344915 System and method for shutting off an optical energy source in a communication system having optical amplifiers
02/05/2002US6344914 Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier
02/05/2002US6344911 Upgradable optical communication system module
02/05/2002US6344910 Optical performance monitor
02/05/2002US6343866 Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion
02/02/2002CA2354350A1 Photodetector array and optical communication monitor module using the same
01/2002
01/31/2002WO2002009349A2 Apparatus and method for optical communication protection
01/31/2002WO2002009325A1 Optical pulse train generator
01/31/2002WO2002009324A1 A method for blocking a fiber-optic channel
01/31/2002WO2002009323A2 System and method for improving optical signal-to-noise ratio measurement range of a monitoring device
01/31/2002WO2002009322A1 Transceiving device
01/31/2002WO2002009299A2 Method and apparatus for extending fiber transmission distance with multiple pre-emphases in optically amplified dwdm system
01/31/2002WO2002008807A1 Optical fiber system
01/31/2002WO2001052449A3 Directional transponders
01/31/2002WO2001050664A3 Method for synchronising the phase of optical return-to-zero (rz) data signals
01/31/2002WO2001048954A3 Optical communication using heterodyne detection
01/31/2002US20020012513 Opto-electrical cross connect device of high density
01/31/2002US20020012509 Optical transmission line
01/31/2002US20020012498 Transverse spatial mode transformer for optical communication
01/31/2002US20020012497 Optical transmission device and optical transmission system employing the same
01/31/2002US20020012495 Optical transmission system for radio access and high frequency optical transmitter
01/31/2002US20020012493 Channel gain control for an optical communications system utilizing frequency division multiplexing
01/31/2002US20020012492 Optical signal processing method and optical signal processing apparatus
01/31/2002US20020012491 Optical microdevice with rotatable microactuator
01/31/2002US20020012487 Polarization mode dispersion generator
01/31/2002US20020012421 Communication system with multicarrier telephony transport
01/31/2002US20020012258 Power control device, remote control receiving device and optical communication device with zero power consumption during standby
01/31/2002US20020012179 Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion
01/31/2002US20020012162 Optical transmission path having sections which overcompensate for dispersion occurring in the sections
01/31/2002US20020012161 Raman amplifier module and optical transmission system using the same
01/31/2002US20020012152 Methods and systems for digitally processing optical data signals