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)
10/1989
10/24/1989US4875756 Fresnel lens apparatus for optically coupling a plurality of data channels
10/19/1989WO1989010031A1 Method and apparatus for transmitting information
10/18/1989EP0337796A2 Device for measuring optical frequency modulation characteristics
10/18/1989EP0337671A2 Signal transmission system for machine tools, inspection machines, and the like
10/18/1989EP0337670A2 Signal transmission system for machine tools, inspection machines, and the like
10/18/1989EP0337669A2 Signal transmission system for machine tools, inspection machines, and the like
10/18/1989EP0337644A1 Method and apparatus for transmitting information
10/18/1989EP0337619A1 Communication system
10/18/1989EP0337557A1 Circuit for a light-sensitive element
10/18/1989EP0337254A2 Communication link between moving bodies
10/18/1989EP0337250A1 Apparatus for winding optical fiber on a bobbin
10/17/1989US4875215 Fibre communication laser system
10/17/1989US4874216 Variable-waveguide optical branching filter
10/11/1989EP0336308A2 Method and device for automatic frequency control of semiconductor lasers
10/10/1989US4873431 Recording apparatus with optical fiber cable interconnecting microcomputers
10/10/1989US4872738 Acousto-optic fiber-optic frequency shifter using periodic contact with a surface acoustic wave
10/10/1989CA1262271A1 Method and device for data transmission over several parallel lines, in particular optical fiber
10/10/1989CA1262261A1 Optical mixer for upconverting or downconverting an optical signal
10/10/1989CA1262260A1 Broadband optical distribution system
10/05/1989WO1989009518A1 Communication system
10/05/1989DE3809972A1 Method for transmitting information signals between modules, especially between plug-in modules of a communications system
10/05/1989DE3809395A1 Optical polarisation diversity receiver arrangement
10/04/1989EP0335104A2 Arrangement to optically couple one or a plurality of optical senders to one or a plurality of optical receivers of one or a plurality of integrated circuits
10/04/1989EP0335068A2 Photodetector
10/04/1989EP0117868B1 Method and device for separating position of fault in light transmission line
10/03/1989US4871920 High power wide band amplifier using optical techniques and impedance matching to source and load
10/03/1989US4871225 Fiber optic distribution network
10/03/1989US4871224 Device for optical connections of one or more optical emitters with one or more optical detectors of one or more integrated circuits
10/03/1989US4871222 Reflex transmitter for a bidirectional light waveguide communication system
09/1989
09/28/1989DE3809371A1 Transmission device for optical signals
09/28/1989DE3808892A1 Amplifier for light with equal amplitudes of the output pulses
09/27/1989EP0334254A2 Magnetically activating optical data link
09/27/1989EP0334192A1 Supervision in a fibre-optical duplex transmission system
09/27/1989EP0334054A2 Node for a fast packet-switching network in optical-electrical technology
09/27/1989EP0333751A1 Avalanche photodiode quenching circuit.
09/26/1989US4870637 Optical backplane
09/26/1989US4870268 Color combiner and separator and implementations
09/26/1989CA1260541A1 Optical communications system including a directional coupler
09/26/1989CA1260164A1 Multiplex transmission of analog signals by fiber optic channel
09/21/1989WO1989008954A1 Detection of stress applied to an optical fibre
09/21/1989DE3828200A1 Wavelength-selective optical receiver
09/20/1989EP0332945A2 Optical cable network
09/20/1989EP0332858A2 Two-way optical link system
09/19/1989US4868897 Network formed as an optical homodyne or heterodyne receiver circuit
09/19/1989US4868896 Optical superheterodyne receiver for, in particular, phase-shift modulated light
09/19/1989US4868895 Optical device copensator
09/19/1989US4868894 System for transmitting microwave signals via an optical link
09/19/1989US4868809 Optical communication system
09/19/1989US4867560 Optical alignment system
09/19/1989US4867522 Wavelength sensitive optical devices
09/19/1989CA1259718A1 Optical local area network using a common optical carrier with separate user angle modulation
09/14/1989DE3806824A1 Electro-optical transmission system
09/14/1989DE3806493A1 Bus system
09/13/1989EP0332473A1 Detection of stress applied to an optical fibre
09/13/1989EP0332199A2 Transmission line switching system
09/13/1989EP0216765B1 Optical receiver
09/12/1989US4865449 Optical signal rejection filter and application of said filter to ring interferometers
09/08/1989WO1989008356A1 Method and apparatus for modulating a semiconductor laser
09/06/1989EP0331337A2 Testing in the manufacture, operation, and maintenance of optical device assemblies
09/06/1989EP0331304A2 Amplification of optical signals
09/06/1989EP0331255A2 Optical transmission system
09/05/1989US4864652 Method and apparatus for reducing radiation exposure through the use of infrared data transmission
09/05/1989US4864651 Light communication apparatus with tracking ability
09/05/1989US4864650 Expansion network for increasing the number of subscriber terminations at a passive optical bus system comprising optical mixers
09/05/1989US4864649 Driver circuit for driving a light emitting element by superimposing an analog sub-information signal over a digital main signal
09/05/1989US4864648 Method of transmitting a group at least two measured values through an optical transmission path
09/05/1989US4864489 Field instrumentation system
09/05/1989US4864193 Luminous element and driving circuit
09/05/1989US4863233 Fiber optic interconnect system
09/05/1989US4863230 Optically controlled selector
08/1989
08/31/1989DE3905481A1 Method and device for optical data traffic
08/30/1989EP0330190A2 Optical transmission apparatus for transmitting and receiving optical signals via an optical fibre
08/30/1989EP0330165A2 Infrared band information transmission emitting and receiving device
08/29/1989US4862404 Digital circuit for suppressing fast signal variations
08/29/1989US4861914 Discoloration inhibitors for aromatic amines
08/29/1989US4861136 Optical communication systems using fabry-perot cavities
08/29/1989US4860968 Communication link between moving bodies
08/29/1989US4860559 Information transfer
08/23/1989EP0329186A2 Polarization diversity optical receiver for coherent optical communication
08/23/1989EP0328559A1 Bidirectional roller deck control for a self guided vehicle
08/22/1989US4860294 Integrated-optical arrangement for bidirectional optical message or signal transmission
08/22/1989US4859965 Optical gain control of GaAs microwave monolithic integrated circuit distributed amplifier
08/22/1989US4859018 Optical fiber bandwidth limiting
08/22/1989US4859016 Fiber optic amplifier
08/22/1989US4859015 Optical receiver having optical gain medium and mode selector
08/22/1989CA1258692A1 Optical communication system
08/16/1989EP0328324A2 Non-intrusive fibre optic tap
08/16/1989EP0328266A2 Binary data regenerator with adaptive threshold level
08/16/1989EP0328156A1 Digital information transmission system and method
08/16/1989EP0327596A1 Opto-electrical power transmission and control system.
08/15/1989US4857727 Optically powered remote sensors with timing discrimination
08/15/1989US4856906 Enhanced system for transmission loss comparison
08/15/1989US4856899 Optical frequency analyzer using a local oscillator heterodyne detection of incident light
08/15/1989US4856864 Optical fiber distribution network including non-destructive taps and method of using same
08/15/1989US4856863 Optical fiber interconnection network including spatial light modulator
08/10/1989WO1989007352A1 Optical systems and methods
08/10/1989DE3803034A1 Photoelectric receiver
08/08/1989US4856095 OPFET demodulator-donwconverter for detecting microwave modulated optical signals
08/08/1989US4856094 Arrangement for polarization control, such as for an optical heterodyne or homodyne receiver
08/08/1989US4856093 Optical heterodyne receiver
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