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)
11/1990
11/27/1990US4973169 Method and apparatus for securing information communicated through optical fibers
11/27/1990CA1277018C High repetition rate laser source having high power
11/27/1990CA1276990C Switched threshold comparator for a fiber-optic receiver
11/22/1990EP0398596A2 Atmospheric optical communication link
11/22/1990EP0398181A2 Apparatus for the transmission of an optical signal
11/22/1990EP0397888A1 Photoelectric connector and photo-outlet
11/20/1990US4972515 Polarization diversity receiver having little deteriorated sensitivity despite use of a square-law demodulator having a restricted dynamic range
11/20/1990US4972514 Full duplex lightwave communication system
11/20/1990US4972513 Multi-point optical amplification repeating system
11/20/1990US4972352 Semiconductors lasers
11/20/1990US4971417 Radiation-hardened optical repeater
11/20/1990CA1276696C Method and apparatus for optical rf phase equalization
11/20/1990CA1276695C Method and apparatus for optical rf amplitude equalization
11/14/1990EP0397372A1 Network topology for reduced blocking and photonic system implementation thereof
11/14/1990EP0397369A2 Optical apparatus for combining light beam arrays having different wavelengths
11/14/1990EP0396875A2 Method of stabilizing the frequency of semiconductor laser and apparatus therefor
11/14/1990EP0396686A1 A process and device for the decentralised transmission of information on a transfer path.
11/13/1990US4970717 Photonic local/metropolitan area network
11/13/1990US4969712 Optoelectronic apparatus and method for its fabrication
11/13/1990US4969710 Optical fiber transmission path with dispersion compensation
11/13/1990CA1276236C Fault direction in an optical communications system
11/12/1990CA2015926A1 Optical transmission apparatus
11/07/1990EP0396370A2 Random-access digitally-tuned coherent optical receiver
11/07/1990EP0395828A2 Optical transmission apparatus
11/07/1990EP0257085B1 A device for providing an information transferring communication between electric components or circuits
11/06/1990USH850 Single optical fiber slave/master transmision system
11/06/1990US4969152 Photo-lasertransistor
11/06/1990US4968110 Apparatus and method for optimizing the modulation efficiency of a remotely-located, polarization-sensitive, integrated optic modulator which is addressed with a non-polarization-preserving fiber
10/1990
10/31/1990EP0395277A1 Optical amplifier gain control
10/31/1990EP0395060A2 Optical receiver
10/31/1990EP0394916A1 Ultrashort optical pulse modulating equipment
10/31/1990EP0394605A2 High-speed modulator of the polarization of an optical carrier
10/31/1990DE3915137C1 Circuit for data exchange in traffic - uses optical carrier wave with length of additional pulses adjusted to bandwidth of input circuit
10/31/1990CN2064960U 漫反射式红外自动开关 Diffuse Infrared Automatic Switch
10/30/1990CA1275699C Dual media local area network interfacing
10/30/1990CA1275698C Device and method for signal transmission and optical communications
10/24/1990EP0393967A2 Polarization controller for use in optical fiber communication system
10/24/1990EP0393774A1 Circuit and data transmission device containing such activation
10/24/1990EP0393373A2 Optical heterodyne receiver
10/24/1990EP0393282A2 Signal conditioning circuits
10/24/1990EP0393237A2 Communication link between moving bodies
10/23/1990US4965858 Polarization diversity optical receiver for coherent optical communication
10/23/1990US4965857 Method for synchronized polarization switching of an optical transmission signal of an optical transmission system having superheterodyne reception and an apparatus for the implementation of said method
10/23/1990US4965856 Secure optical-fiber communication system
10/23/1990US4965444 Automatic gain control fiber optica-to-electrical transceiver
10/23/1990US4964693 Radio having optical controls and method of optically controlling same
10/23/1990CA1275513C Technique for repelling carriers in optical communications to minimize mutual interference
10/23/1990CA1275419C Second harmonic generation with schiff bases
10/19/1990WO1990013067A1 Data transmission system
10/18/1990WO1990012462A1 Infrared network entry permission method and apparatus
10/18/1990WO1990012452A1 Optical receivers
10/17/1990EP0392493A1 Optical repeater and optical network using the same
10/17/1990EP0392490A1 Optical branching equipment and optical network using the same
10/17/1990EP0392416A1 Process for applying a controlled delay to a signal, particularly an ultra-high frequency signal, delay device, optical transmission system and antenna system applying this process
10/17/1990EP0392244A2 Optical receiver with an avalanche photodiode
10/17/1990CN1046251A Method and apparatus for reducing noise on signal encodable on plurality of predetermined levels
10/17/1990CN1010071B Optical transmission system
10/16/1990US4963832 Erbium-doped fiber amplifier coupling device
10/16/1990US4962985 Protective coatings for optical devices comprising Langmuir-Blodgett films
10/10/1990EP0391597A2 Optical fiber microcellular mobile radio
10/10/1990EP0391285A1 Optical transmitter power measurement and control apparatus
10/10/1990CN2063723U Ultraviolet light remote control switch
10/10/1990CN1046077A Transient voltage suppression for electro-optic modules
10/10/1990CN1046075A Testing optical fibre links
10/09/1990US4962502 Optical signal processing device
10/09/1990US4961644 Transmission line surveillance system measuring changes in phase of propagated signals
10/09/1990CA1274995A1 Optical switching means
10/08/1990CA2008037A1 Method of decoding encoded relative spectral data
10/04/1990WO1990011657A1 Optical wavelength communication system and method of using same
10/03/1990EP0390645A1 Method of/and device for noise reduction on a codable multi-predetermined level signal
10/03/1990EP0390341A1 Method and apparatus for identifying an optical transmission medium
10/03/1990EP0390320A2 Testing optical fibre links
10/03/1990EP0390069A2 Polarization diversity heterodyne receiver of a baseband combining type in which i.f. signals are adjusted by negative feedback from a device output signal
10/03/1990EP0390002A2 Optical-communication transmission system for diplex or duplex transmission
10/03/1990EP0389824A1 Transient voltage suppression for electro-optic modules
10/03/1990EP0118467B1 Optically coupled integrated circuit array
10/02/1990US4961221 Communication method and system with encryption of information
10/02/1990US4961205 For transmitting a digital data signal
10/02/1990US4960319 Active polarization control servo and method
10/02/1990US4960315 Atmosphric optical communication link
09/1990
09/29/1990WO1990011539A1 Radio having optical controls
09/28/1990CA2012687A1 Method and device for reducing noise in a multiple preset levels codable signal
09/28/1990CA2010908A1 Testing optical fibre links
09/26/1990EP0389182A2 Transmitter and receiver for data link system
09/26/1990EP0389174A1 Wireless headphones
09/26/1990EP0389165A2 Fiber optic data link system
09/26/1990EP0389125A2 Optical transceiver with multiple communication modes
09/26/1990EP0389097A2 Photonic local/metropolitan area network
09/26/1990EP0388846A1 Laser feeding and controlling apparatus for an optical fibre link between a subscriber and a telecommunication exchange
09/26/1990EP0232319A4 Optical communications systems
09/25/1990US4959874 Optical wireless communication system
09/25/1990US4959838 Method and circuit for shaping laser output pulses
09/25/1990US4959828 Multi-channel infrared cableless communication system
09/25/1990US4959827 Laser signal mixer circuit
09/25/1990US4959826 Spread spectrum optical communication system with heterodyne detection
09/25/1990US4959810 Universal remote control device
09/25/1990US4959535 Optical receiver circuit including a filter network to minimize noise
09/25/1990US4959532 Optical neural network and method
09/25/1990US4958921 Light-driven phase shifter
09/25/1990US4958902 Optical space transmission apparatus
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