Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › 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
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)
06/1998
06/02/1998CA2220760A1 Optical switching unit, particularly for switching to standby components in optical transmission systems
05/1998
05/28/1998WO1998023064A2 Method and device for signal repetition
05/28/1998WO1998023049A1 Signal transmitter with automatic output control
05/28/1998WO1998023048A1 Passenger conveyance vehicles and systems utilizing the same
05/28/1998DE19640292C1 Verfahren und Anordnung zur Erzeugung eines optischen Frequenzreferenzsignals Method and apparatus for generating an optical frequency reference signal
05/28/1998CA2272242A1 Method and device for signal repetition
05/27/1998EP0844757A2 Branching system with optical add drop multiplexing function
05/27/1998EP0844756A2 Optical communication system and transmitting device
05/27/1998EP0844752A2 Automatic dispersion compensating optical transmission system
05/27/1998EP0844751A2 Optical transmitter, terminal-station apparatus having the optical transmitter and optical communication system, monitoring the optical transmitted signal
05/27/1998EP0844750A2 Optical amplifier unit control methods, optical amplifier systems and systems which use the methods and amplifier systems
05/27/1998EP0844749A2 Circuit for measuring the received optical power
05/27/1998EP0844748A1 Method and apparatus of optical data transmission along a free space path
05/27/1998EP0844736A2 Waveform-Shaping circuit and a data-transmitting apparatus using such a circuit
05/27/1998EP0844706A2 Optical amplifier and laser light generating apparatus
05/27/1998EP0844473A1 Optical bench and its application
05/27/1998EP0843923A1 Flag field-based routing mechanism for fiber optic telecommunication system employing sts-based transmission format containing asynchronous transfer mode cells
05/27/1998EP0843914A1 Method for operating an output of a sensor or converter receiving intermittent energy pulses and device for implementing same
05/27/1998EP0739523B1 Ic communication card
05/27/1998CA2218743A1 Transmitting/receiving facility and method for transmitting broadband signals as well as transmitting/receiving facility for receiving broadband signals
05/26/1998US5757992 Fiber optic communication system and method
05/26/1998US5757912 System and method for quantum cryptography
05/26/1998US5757840 Semiconductor laser modulation method therefor and optical communication system using the same
05/26/1998US5757832 Optical semiconductor device, driving method therefor and light source and opitcal communication system using the same
05/26/1998US5757828 Semiconductor laser device, method for driving the same, and optical communication system using the same
05/26/1998US5757774 Network traffic protection system
05/26/1998US5757531 Gils for heterodyne receiver having low intermediate frequency
05/26/1998US5757530 Signal transmitter with automatic output control and systems utilizing the same
05/26/1998US5757529 In-line regenerating apparatus for regenerating a soliton-conveyed signal by synchronously modulating the solitons by means of a non-linear optical loop mirror
05/26/1998US5757528 Universal directionally adjustable optical transmitter and receiver assembly
05/26/1998US5757526 Optical communication network and method for optically detecting a fault
05/26/1998US5757523 Optical radiation devices
05/26/1998US5757277 Wireless selective call receiver and method and system for writing desired data in the same
05/26/1998CA2120189C Device for evaluating the transmission quality of an optical amplifier
05/26/1998CA2119326C Technique utilizing a rotating waveplate for reducing polarization dependent hole-burning in an amplified optical transmission system
05/26/1998CA2115862C Technique for reducing polarization dependent gain in an amplified optical transmission system
05/26/1998CA2072318C Amplifying circuit arrangement
05/25/1998CA2217221A1 Optical bench and use thereof
05/25/1998CA2208964A1 Method and device for the optical transmission of data over distances in space
05/22/1998WO1998021843A1 Linearized external modulator transmitter with improved dynamic range
05/20/1998EP0843446A2 Optical transmission using PPM
05/20/1998EP0843199A2 Method and apparatus for optical signal processing by photoinduced loss and/or gain gratings
05/20/1998EP0843198A2 Wavelength conversion device employing Bessel beams with parallel polarization
05/20/1998EP0842576A1 Signal routing for fibre optic networks
05/20/1998EP0842575A1 Improvements in or relating to optical add/drop wavelength division multiplex systems
05/20/1998EP0842574A1 Add/drop multiplexer
05/20/1998EP0842483A1 Process for controlling the access of a data station to mobile data carriers
05/20/1998DE19750641A1 Semiconductor photodetector with optical attenuator
05/20/1998DE19701077C1 Mobile information carriers identification device in sensor of a key and lock association, esp. for access control arrangement
05/20/1998DE19647488A1 Optical amplifier for optical transmission system
05/19/1998US5754535 Method for TDMA management, central station, terminal station and network system to perform this method
05/19/1998US5754528 Virtual ring configuration method and virtual ring system
05/19/1998US5754334 Device for and method of modifying the spectral characteristics of optical signals
05/19/1998US5754325 Optical regenerating circuit
05/19/1998US5754324 Method of setting an electro-optical signal path and an apparatus for carrying out the method
05/19/1998US5754323 Point-to-point laser communication device
05/19/1998US5754322 Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
05/19/1998US5754321 Add/drop optical circuit for a wavelength-division multiplexed network
05/19/1998US5754319 Optical amplifier combiner arrangement and method for upstream transmission realized thereby
05/19/1998US5754126 Palm mouse
05/19/1998US5753929 Multi-directional optocoupler and method of manufacture
05/19/1998US5753928 Monolithic optical emitter-detector
05/19/1998CA2081021C Optical communications link fault signalling
05/19/1998CA2062216C Optical-to-electric transducer with extended dynamic range
05/14/1998WO1998020684A2 Communication system by diffused infrared rays
05/14/1998WO1998020631A1 System for providing location-specific data to a user
05/14/1998DE19646628A1 Bidirectional communication system with redundancy function
05/14/1998DE19646283A1 Reception circuit arrangement for optical waveguide
05/14/1998CA2270133A1 System for providing location-specific data to a user
05/13/1998EP0841835A2 Rearrangement procedure for a multirate/multicast SDH/SONET cross-connect
05/13/1998EP0841768A2 Method of and device for controlling the phase of a clock signal in a point-to-point optical transmission
05/13/1998EP0841764A2 Crosstalk suppression in a multipath optical amplifier
05/13/1998EP0841732A1 Device for optical phase modulation using a semiconductor optical amplifier and method therefor
05/13/1998EP0841552A1 Optical time domain reflectometer for measurement in optical networks with currently applied traffic signals
05/13/1998EP0840963A1 Method and device for the coarse ranging of a tdma pon system
05/13/1998CN2281616Y Infrared signal switching cordless telephone and infrared signal
05/13/1998CN1181669A Synchronization-message-based active reference switching unit
05/13/1998CN1181647A Erbium doped optical fiber amplifier for automatically tracing and filtering wavelength of transmitted light and its operation method
05/13/1998CN1181514A Davice and method to suppress Q-switching in optical amplifying device
05/12/1998US5751758 Phase conjugate wave generating device, wavelength converting method, optical dispersion compensating method and multi-wavelength light generating device
05/12/1998US5751458 Optical double transmission system
05/12/1998US5751456 Multiwavelength add/drop multiplexer
05/12/1998US5751455 Optical transmission system and optical network terminals used therein
05/12/1998US5751454 Wavelength bypassed ring networks
05/12/1998US5751009 Optical isolator having leadframe with non-planar mounting portions
05/12/1998CA2103859C Predistortion semiconductor optical source
05/12/1998CA2079764C Bidirectional transmission system, particularly of the optical fibre type, using a single carrier for both transmission directions
05/12/1998CA2028720C Amplifier adapter for optical lines
05/11/1998CA2214544A1 Method and device for optical phase modulation by means of semiconductor amplifiers
05/08/1998CA2218828A1 Cross-connect multirate/multicast sdh/sonet rearrangement procedure and cross-connect using same
05/07/1998WO1998019416A1 Transient suppression in optical wavelength division multiplex network
05/07/1998WO1998019415A1 Programmable wavelength router
05/07/1998WO1998019409A2 High-performance parallel processors based on star-coupled wavelength division multiplexing optical interconnects
05/07/1998WO1998019406A1 Improvements in optical polarisation scrambling
05/07/1998DE19644078A1 Wireless data transmission system for optical communication
05/07/1998CA2268131A1 Programmable wavelength router
05/06/1998EP0840473A1 Adaptation device for optical communication network
05/06/1998EP0840470A2 Optical network termination of a hybrid fiberoptic-coaxial access network
05/06/1998EP0840469A2 Device and method to suppress q-switching in an optical amplifying device
05/06/1998EP0840468A2 Optical frequency control system
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