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)
01/2003
01/02/2003EP1271805A1 Method and apparatus for the correction of optical signal wave front distortion within a free-space optical communication system
01/02/2003EP1271804A2 Power feeding for an optical transmission system
01/02/2003EP1271372A1 System for selecting an appropriate optical fibre type for a communication network
01/02/2003EP1271197A2 Wavelength division multiplexer using planar lightwave circuit
01/02/2003EP1271193A1 Optical transmission line and optical transmission system including it
01/02/2003EP1271114A2 Method and device for measuring the waveform of an optical signal
01/02/2003EP1269664A1 Optical communication system with two parallel transmission paths
01/02/2003EP1269663A1 A communications network architecture
01/02/2003EP1269662A1 Power controlling network element
01/02/2003EP1269661A1 Method and system for controlling polarization mode dispersion
01/02/2003EP1269660A1 Optocoupler for a non-intrinsically safe circuit
01/02/2003EP1269234A2 Fiber optic device operating at two or more wavelengths
01/02/2003EP1269233A2 Dispersion slope compensating optical waveguide fiber
01/02/2003EP1269115A1 Battery module transceiver for extending the range of an infrared remote controller
01/02/2003EP0782796B1 Optical data communication and location apparatus and method for use therewith
01/02/2003EP0740894B1 Infrared communication system
01/02/2003DE20209528U1 Communications network optical transfer switch detects traffic gaps
01/01/2003CN2529460Y Y-shape two-type fibre-optical groove
01/01/2003CN1388660A Single photon generator
01/01/2003CN1388659A Great-range system delay regulating method and circuit for passive optical optical network
01/01/2003CN1388658A Bandwidth compensating method for ranging ATM passive optical network
01/01/2003CN1388657A Remote controller finder
01/01/2003CN1388656A Expanding apparatus with attenuating light filter using for regulating optical signal gain
01/01/2003CN1388392A Temperature compensating equipment of optical fibre raster
01/01/2003CN1097905C Network system for communicating with plural channels node device and communication method
01/01/2003CN1097878C Electric isolation between infrared receiver and further electronic circuits
01/01/2003CN1097738C Dispersion-flattened single-modular optical waveguide with large effective module surface area
12/2002
12/31/2002US6501876 Bidirectional optical communication device and bidirectional optical communication apparatus
12/31/2002US6501871 Active equipment protection methods and apparatus communicatively decoupling data add/drops
12/31/2002US6501870 System and method for reducing effects of optical impairments in optically amplified lightwave communication systems
12/31/2002US6501774 Optical transmission apparatus for multiple wavelengths and optical transmission wavelength control method
12/31/2002US6501594 Long-band fiber amplifier using feedback loop
12/31/2002US6501593 Raman amplifier, optical repeater, and raman amplification method
12/31/2002US6501583 Optical receiver module optical transmitter module phase-locked loop circuit voltage-controlled oscillator and frequency response controllable amplifier
12/31/2002US6501582 Cascaded line-of sight free-space communications system
12/31/2002US6501581 Adaptor and method for use with a light-communication device
12/31/2002US6501580 Method and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power level
12/31/2002US6501579 Apparatus, system, and method for extracting an optical clock signal from an optical data signal
12/31/2002US6501578 Apparatus and method for line of sight laser communications
12/31/2002US6501577 Optical data bus for a vehicle
12/31/2002US6501576 Wireless data transfer using a remote media interface
12/31/2002US6501574 Optical multiplex transmission apparatus and optical multiplex transmission method
12/31/2002US6501573 Apparatus and method for monitoring the qualities of optical signal using clock amplitude
12/31/2002US6500026 Hybrid connector and process for assembling the same
12/31/2002CA2289400C High speed differential optoelectronic receiver
12/29/2002CA2384236A1 Wavelength-selective add/drop arrangement for optical communication systems
12/29/2002CA2383022A1 Method and apparatus for the correction of optical signal wave front distortion within a free-space optical communication system
12/29/2002CA2382635A1 Method and apparatus for the correction of optical signal wave front distortion within a free-space optical communication system
12/28/2002CA2383717A1 An optical fiber based on wireless scheme for wideband multimedia access
12/27/2002WO2002103956A1 Error-correction multiplexing apparatus, error-correction demultiplexing apparatus, optical transmission system using them, and error-correction multiplexing transmission method
12/27/2002WO2002103948A1 Optical communication system
12/27/2002WO2002103939A1 Optical network system and controller
12/27/2002WO2002103938A2 Method and apparatus for optical data signaling using dark photodiode
12/27/2002WO2002103937A1 Optical communication system and optical communication apparatus
12/27/2002WO2002103936A2 Method and apparatus for reporting input powers in an optical device
12/27/2002WO2002103935A1 Optical communication device and system
12/27/2002WO2002103447A1 Wavelength selective optical device
12/27/2002WO2002103418A2 Integrated optical device
12/27/2002WO2002084901A3 Method for controlling a laser-based 3r regenerator
12/27/2002WO2002071670A3 Method and system for handling optical signals
12/27/2002WO2001078262A3 Remotely-interrogated high data rate free space laser communications link
12/26/2002US20020198994 Method and system for enabling and controlling communication topology, access to resources, and document flow in a distributed networking environment
12/26/2002US20020198028 Telephone regulation system and portable telephone terminal device used in such a system
12/26/2002US20020197986 Cellular communications system featuring a central radio pool/traffic router
12/26/2002US20020197008 Wavelength division multiplexer using planar lightwave circuit
12/26/2002US20020197007 Flexible optical network architecture and optical add/drop multiplexer/demultiplexer therefor
12/26/2002US20020197006 Flexible optical network architecture
12/26/2002US20020197001 Optical crossconnect system and its controller and method
12/26/2002US20020196549 Multi-pass configurations
12/26/2002US20020196541 Tunable optical filter
12/26/2002US20020196530 Optical amplifier
12/26/2002US20020196528 Optical amplifier modules
12/26/2002US20020196527 Method for the amplification of wavelength division multiplex (WDM) signals in a WDM transmission system, as well as optical amplifier, optical amplifier system and WDM transmission system for it
12/26/2002US20020196520 Programmable optical multiplexer/demultiplexer
12/26/2002US20020196509 Light source for generating an output signal having spaced apart frequencies
12/26/2002US20020196508 Generation of optical signals with return-to-zero format
12/26/2002US20020196507 Optical transmission system
12/26/2002US20020196506 Atmospheric optical data transmission system
12/26/2002US20020196505 Power feeding for an optical transmission system
12/26/2002US20020196504 Gain equalizer for two-way transmission and monitor circuit for two-way transmission
12/26/2002US20020196503 Method and system for dispersion control of electromagnetic signals in communication networks
12/26/2002US20020196502 Sheet-like electrooptical component, light-guide configuration for serial, bidirectional signal transmission and optical printed circuit board
12/26/2002US20020196501 Tandem optoelectronic transciver package and method of operating an optical fiber communication network employing the same
12/26/2002US20020196500 Optical subassembly for optical communications
12/26/2002US20020196499 Method and system for multiplexed optical information transport
12/26/2002US20020196498 Optical pulse addition device
12/26/2002US20020196495 Device for adding and dropping optical signals
12/26/2002US20020196492 Method and apparatus for dynamic equalization in wavelength division multiplexing
12/26/2002US20020196491 Passive optical network employing coarse wavelength division multiplexing and related methods
12/26/2002US20020196490 Optical transmission systems, devices, and methods
12/26/2002US20020196489 Wavelength division multiplexing communications network supervisory system
12/26/2002US20020196430 Measuring optical signal power in an optical system
12/26/2002US20020196069 Distortion compensating circuit for electro-optical transducer
12/25/2002CN1387737A Method and system for communication protection
12/25/2002CN1387709A Method and device for optimizing optical transfer signal modulated with binary data signal
12/25/2002CN1387337A Small time slot control system in passive optical network
12/25/2002CN1387330A Bidirectional optical communication equipment device and bidirectional optical communication apparatus
12/25/2002CN1387329A Multi-granularity light switch based on label
12/25/2002CN1097221C Infrared data transfer from selectine calling receiving to information processing device
12/25/2002CA2385691A1 Cellular communications system featuring a central radio pool/traffic router