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| Number | Title | Issue Date |
| 7400829 | Transmission apparatus and path selection method of a transmission apparatus A transmission apparatus that receives an optical signal by selecting any one of a plurality of provided optical signal transmission paths through protection control is configured to include a plurality of optical signal outputting sections that output the optical s... | 07/15/2008 |
| 7367945 | Ultrasound system An ultrasound system includes an ultrasound probe configured for sensing and transmitting ultrasound signals. The ultrasound system further includes an optical conduit configured for coupling a light source and an optical detector in an optical path. The optical con... | 05/06/2008 |
| 7359396 | Optical-core network with selective signal queueing A core network shared by a large number of edge nodes comprises core nodes interconnected by core channels. Selected core channels are provided with buffers to enable temporal alignment of signals arriving at any core node from several other core nodes. A buffer may... | 04/15/2008 |
| 7054560 | Configuration for detecting optical signals of a planar optical circuit A configuration for detecting optical signals of at least one optical channel of a planar optical circuit. At least one deflection device is provided, which couples the optical signals of at least one optical channel at least partly out of the plane of the circuit, ... | 05/30/2006 |
| 6868232 | Fast protection switching by snooping on upstream signals in an optical network An optical network has an optical splitter connected to (1) a working optical subscriber unit (OSU) of a working circuit via a working optical fiber, (2) a protection OSU of a protection circuit via a protection optical fiber, and (3) one or more optical network ter... | 03/15/2005 |
| 6839480 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route In an optical switching apparatus having redundantly-arranged optical switches, a route switching operation mode, an autonomic redundant switching operation mode and a compulsory redundant switching operation mode are discriminated from one another so that these ope... | 01/04/2005 |
| 6755577 | Optical module A wiring pattern of a circuit board comprises two reference voltage lines holding a signal line therebetween, whereas the reference voltage lines on both ends are electrically connected to a conductive bracket. The bracket covers and electrically shields lead pins c... | 06/29/2004 |
| 6333802 | Digital signal transmission apparatus An optical transmitter converts serial hi-vision digital signals sent from a transmitting side peripheral device over a coaxial cable into serial digital optical signals to transmit the resulting signals over an optical fiber. An optical receiver receives... | 12/25/2001 |
| 5999294 | Detachable antenna with optical port The present invention relates to a peripheral apparatus which enables users to communicate with a mobile device via radio as well as optical transmission substantially simultaneously. The peripheral apparatus includes a radio card which includes circuitry... | 12/07/1999 |
| 5936754 | Transmission of CDMA signals over an analog optical link A transmission system for backhauling CDMA signals from remote antennas to the centralized base station of a wireless communication system includes a laser transmitter and an optical receiver coupled to an optical fiber. Wireless signals are backhauled to... | 08/10/1999 |
| 5739936 | Electro-optical circuit for signal transmission An electro optical circuit for transmitting an information bearing signal, such as a signal in the RF, AF or microwave frequency domains, to a predetermined location includes a laser for generating coherent light to be used as a carrier, and an electro op... | 04/14/1998 |
| 5557693 | Apparatus and method for transmitting optical data An apparatus and method for simultaneous transmission of a multiplicity of independent optical data signals without having to precisely align each source of the optical data signals with a single fiber-optic strand including an emitter array for emitting ... | 09/17/1996 |
| 5526157 | Optical submarine cable system A optical submarine cable system having an optical cable comprised of a main optical fiber pair and a sub optical fiber pair; a branching joint box for separating the sub optical fiber pair into a first branching optical fiber pair and a second branching ... | 06/11/1996 |
| 5307193 | Control signal repeater system This is a method and associated apparatus for operating a control signal repeater system to receive infrared (IR) control signals at a first location and cause duplicate control signals to be input at a second location to an IR-controlled device containin... | 04/26/1994 |
| 5280376 | Light transmission system An optical transmission system includes a current and standby optical transmission lines for transmitting digital information signals in parallel. An information string phase difference detector detects the phase difference between the received digital in... | 01/18/1994 |
| 5251053 | Radio communication system In a cellular mobile-radio system with radio stations and transmission facilities remote therefrom, the radio stations send out radio signals and receive radio signals which, in each case, contain information signals. According to the invention, as many a... | 10/05/1993 |
| 5138475 | DC-coupled optical data link utilizing differential transmission A data link is disclosed which utilizes differential communication between pairs of transmitting and receiving devices. In particular, one device of each pair is reserved for communicating a logic"O" and the other is reserved for communicating a logic "1"... | 08/11/1992 |
| 5126871 | Method and apparatus for redundant communication of optical signals with distortion cancellation A fiber optic communication system provides parallel paths to enable cancellation of even order harmonic distortion components. A pair of parallel optical fibers is provided. Each of the fibers is coupled to a corresponding transmitter at one end of the p... | 06/30/1992 |
| 5105293 | Differential optical signal transmission using a single optical fiber In an optical differential signal transmission system, both the optical signal and its complement are transmitted via a single optical fiber, by using wavelength-division multiplexing. In a multipoint transmission system, tri-stateable differential optica... | 04/14/1992 |
| 5077814 | Optical transmission line for use in an optical communication system A mode scrambler is interconnected between a light source and an optical fiber coupler made of a plurality of graded index multi-mode optical fibers. The mode of the input light signals can be converted to a random pattern mode through the mode scrambler,... | 12/31/1991 |
| 4927221 | Balanced lightwave transmission system In a lightwave transmission system for transmitting a digital signal from a transmitter to a receiver through a lightwave guide, in order to enable to transmit a digital signal having a DC component, a constant light beam is switched over to one of two pa... | 05/22/1990 |
| 4871235 | Optical system including etalon for optically processing electromagnetic radiation at a repetition rate greater than about 1.25×104 Hz An optical system is disclosed which includes at least a first source of electromagnetic radiation (signal beam radiation), a device for processing the signal beam radiation, and a detector for detecting the processed signal beam radiation. The processing... | 10/03/1989 |
| 4864647 | Wireless infrared remote control extender One or more infrared receiver units communicate by radio to an infrared transmitter unit in order to extend the operational range of an infrared remote control device that normally operates an electrical or electromechanical apparatus. The receiver conver... | 09/05/1989 |
| 4847507 | Fiber optic guard crossing of circuits having analog and digital sections For circuitry having analog and digital circuit sections and a signal flow path therebetween, a guard crossing for establishing electrical isolation and virtually no capacitive coupling between the two sections comprises optical fiber cables extending bet... | 07/11/1989 |
| 4671604 | Wavelength dependent, tunable, optical time delay system for electrical signals A wavelength dependent, tunable, optical time delay system for electrical signals having a conversion/tuning unit for converting an incoming electrical signal into an optical signal as well as selectively varying the wavelength of the optical signal; a si... | 06/09/1987 |
| 4393518 | Optical communication arrangement An optical transmission arrangement includes a transmitter which transmits an electrical analog input signal as two separate optical signals through a pair of optical fibers to a receiver. Combining the two optical signals, the receiver generates an elect... | 07/12/1983 |
| 4246475 | Fail-safe optical repeater-amplifier assembly for fiber optic systems In an optical data bus system, a fail-safe optical repeater-amplifier assly is provided by light energy amplifying means connected in the data bus for developing gain of signal strength for light signals transmitted along the data bus in a known directio... | 01/20/1981 |
| 4052611 | High speed fiber optic communication link A high speed fiber optic communication link having a differential transmir circuit for receiving digital data and providing a first output for transmitting a signal representing a logic "one" and a second output for transmitting a signal representing a l... | 10/04/1977 |
