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)
11/2001
11/15/2001WO2001086333A2 Emulator for second order polarization mode dispersion (pmd)
11/15/2001WO2001086328A1 Optical component and dispersion compensating method
11/15/2001US20010041032 Coupling element for connecting an electrical apparatus to an optical data bus
11/15/2001US20010041031 Optical head
11/15/2001US20010040922 Process for recovering digital optical signals and a feedback decision circuit
11/15/2001US20010040721 Method for controlling perfomance of optical amplifiers
11/15/2001US20010040720 Optical amplifiers with a simple gain/output control device
11/15/2001US20010040719 Raman amplifying control unit and optical transmission system
11/15/2001US20010040713 Receiving apparatus, transmitting apparatus, and communication system
11/15/2001US20010040711 Optical transmission including optical restoration
11/15/2001US20010040710 Optical communication system
11/15/2001DE10021860A1 Method and circuit for determining optical signal to noise ratios by optical transformation
11/15/2001DE10020951A1 Optic dispersion compensator, preferably before or after optic transmission path
11/15/2001CA2408784A1 Chromatic dispersion compensation
11/14/2001EP1154591A2 Method and apparatus for communication signal autotracking in a free space optical transmission system
11/14/2001EP1154590A1 Infrared local area network
11/14/2001EP1154299A1 Optical communications device
11/14/2001EP1154291A1 Optical communication apparatus
11/14/2001EP1153488A1 Method for monitoring the transmission quality of an optical transmission system, notably an optical wavelength-division multiplex network
11/14/2001EP1153462A1 Wdm transmitter
11/14/2001EP1153332A1 Non-linearity compensation in optical devices and transmission systems
11/14/2001EP1153331A1 Opto-electronic techniques for reducing phase noise in a carrier signal by carrier suppression
11/14/2001CN1074877C Telephone system of utilizing infrared tech. and its control method
11/13/2001US6317539 Interleaved sampled and chirped optical waveguide gratings for WDM channel operations and resulting devices
11/13/2001US6317535 System and method for testing optical fibers that lead between a telecommunications provider and a customer's premises
11/13/2001US6317534 Optical wavelength routing device
11/13/2001US6317529 Optical cross-connect apparatus
11/13/2001US6317429 Communication apparatus, network system using communication apparatus and control method used in network system
11/13/2001US6317414 Signal switching method
11/13/2001US6317255 Method and apparatus for controlling optical signal power in response to faults in an optical fiber path
11/13/2001US6317252 Dynamic channel copying device for use in fiber optics system using a nonlinear optical media
11/13/2001US6317243 Optical upconverter apparatuses, methods and systems
11/13/2001US6317242 Optical bus system and signal processor
11/13/2001US6317241 Normal dispersion fiber optic transmission system
11/13/2001US6317240 System for and a method of compensating polarization dispersion in an optical transmission system
11/13/2001US6317239 Optical repeaters for single- and multi-wavelength operation with dispersion equalization
11/13/2001US6317238 Chromatic dispersion management for optical wavelength division multiplexed transmission systems
11/13/2001US6317236 Method and apparatus for transmitting an internet protocol (IP) packet within a fiber optic network
11/13/2001US6317235 Method and system for preventing burn-out of infrared transmitter diodes
11/13/2001US6317234 Communications network
11/13/2001US6317233 Optical power equalizer in WDM optical communication system and variable attenuator for use therein
11/13/2001US6317232 Bi-directional all-optical regenerator
11/13/2001US6317231 Optical monitoring apparatus and method for network provisioning and maintenance
11/13/2001US6317230 Optical cross-connect system and optical transmission system
11/13/2001US6316286 Method of equalizing device heights on a chip
11/13/2001US6315718 Method for hip retraction
11/11/2001CA2347217A1 Matrix switch circuit
11/08/2001WO2001084751A1 Optical communication apparatus and communication method
11/08/2001WO2001084750A1 Optical dispersion compensating device and optical dispersion compensating method using the device
11/08/2001WO2001084749A1 Optical dispersion compensating device and optical dispersion compensating method using the device
11/08/2001WO2001084748A1 Receiver for an optical information transmission
11/08/2001WO2001084747A2 Telescope mirror for high bandwidth free space optical data transmission
11/08/2001WO2001084746A1 Method and arrangement for measuring the optical signal quality in a fiber network using optical cross-connectors
11/08/2001WO2001084726A2 Spintronic optical shutter
11/08/2001WO2001084725A2 Optical transmission system
11/08/2001WO2001084713A1 Circuit with an optocoupler
11/08/2001WO2001084679A1 Universal controller for an optical amplifier
11/08/2001WO2001045451A9 Four-fiber ring optical cross-connect system using 4x4 switch matrices
11/08/2001WO2001018921A8 Multifunction optical transmitter for dwdm system
11/08/2001US20010038729 System comprising in-line wavelength sensitive polarimeter
11/08/2001US20010038641 Data communication method, electronic apparatus, and physical-layer-control integrated circuit
11/08/2001US20010038608 Traffic protection mechanism for a fiber optic network having a linear topology
11/08/2001US20010038488 Optical communication system and optical amplifier
11/08/2001US20010038486 Method for characterizing polarization transformers
11/08/2001US20010038482 Optical transmission system having an optical surge suppression function
11/08/2001US20010038481 Apparatus, system, and method for extractin an optical clock signal from an optical data signal
11/08/2001US20010038479 Programmable optical add/drop multiplexer
11/08/2001US20010038478 Structure of a bidirectional wavelength optical function module
11/08/2001US20010038476 Synchronous digital communications system
11/08/2001US20010038475 Synchronous digital communications system
11/08/2001US20010038474 AC performance monitor with no clock recovery
11/08/2001US20010038472 Automatic retrieval of wavelength-division multiplexed ring networks
11/08/2001US20010038471 Fault communication for network distributed restoration
11/08/2001US20010038081 Circuit with an optocoupler
11/07/2001EP1152631A2 Supervisory control plane over wavelenght routed networks
11/07/2001EP1152556A2 Self-aligning infra-red communication link
11/07/2001EP1152555A1 Telescope mirror for high bandwidth free space optical data transmission
11/07/2001EP1152553A2 Ground to space to ground trunking system
11/07/2001EP1151570A1 Method and apparatus for upgrading an optical fiber communication system
11/07/2001EP1151568A1 Network nodes with optical add/drop modules
11/07/2001EP1151560A1 Multi-channel wave division multiplexer system
11/07/2001EP1151559A1 Reduction of the distortion of optical impulses through polarisation mode dispersion in optical transmission systems
11/07/2001EP1151558A2 Method and apparatus for optical performance monitoring in wavelength division multiplexed fiber optical systems
11/07/2001EP1151557A1 Data switch
11/07/2001EP1151506A1 Balanced gain flattening filters
11/07/2001EP1151505A1 Gain flattening in fiber amplifiers
11/07/2001EP1151336A1 Fabrication of multiplexing and demultiplexing single-mode fiber optic couplers
11/07/2001CN2458823Y Analog optical fibre transmission apparatus for microwave antenna receiving signal
11/07/2001CN1321020A Method and device for regenerating return-to-zero code or non-return-to-zero code in high-speed optical communication
11/07/2001CN1321011A Bandwidth allocation method for passive optical network based on ATM
11/07/2001CN1074619C Optical data transmission device for realizing double-spare optical data transmission
11/06/2001US6314223 Diffractive vertical cavity surface emitting laser power monitor and system
11/06/2001US6314217 Optical transmission device and optical transmission system employing the same
11/06/2001US6314189 Method and apparatus for quantum communication
11/06/2001US6314163 Hybrid universal broadband telecommunications using small radio cells interconnected by free-space optical links
11/06/2001US6313941 Optical component, optical amplifier and method of controlling optical amplifier characteristic
11/06/2001US6313940 System based control of optical amplifier transmission functions
11/06/2001US6313934 Chromatic dispersion measurement scheme for optical systems having remote access points
11/06/2001US6313933 Bidirectional wavelength division multiplex transmission apparatus
11/06/2001US6313701 External optical modulation system comprising a predistorter