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| Number | Title | Issue Date |
| 8175463 | Method and apparatus for connecting AC powered switches, current sensors and control devices via two way IR, fiber optic and light guide cables A method for connecting an AC powered device, which has an optical receiver, with a control circuit, which has an optical transmitter, using at least on optical medium cable includes the steps of terminating the cable at both of its ends, introducing the processed c... | 05/08/2012 |
| 8145062 | Optical amplifier capable of amplifying optical signals that traverse separate transmission fibers Optical amplification by combining two or more optical signals from separate optical fibers, amplifying the combined signal using an optical fiber, and separating the amplified signals into their constituent optical signals. The separated optical signals may then be... | 03/27/2012 |
| 8126334 | Method for detecting a signal on a passive optical network A transceiver assembly is provided for use in an optical telecommunications network. The circuitry arrangement in the transceiver of the present invention generates a ranging signal that is transmitted along the fibers attached thereto and then filters the return si... | 02/28/2012 |
| 8121489 | Optical transmitting and receiving system Signals can be superimposed on optical phase even when low-coherency light is used, and a bit rate and a signal coding format similar to those used in ordinary optical communications can be used. A transmitter includes an asymmetric interferometer or an antisqueezed... | 02/21/2012 |
| 8107823 | Optical transmission module In an optical transmission module having a communication module which is freely movable in a case, when a tensile force is generated on an optical cable after connection of an optical transmission module, optical coupling surface and an optical axis center follow ea... | 01/31/2012 |
| 8103169 | VWS secure/non-secure bypass switch Disclosed is a secure/non-secure bypass switch, which includes a secure mode signal path, and a non-secure mode signal path, wherein signals are routed through an encryption device connected in the secure mode signal path when no power is supplied to the switch, and... | 01/24/2012 |
| 8098994 | Optical interconnection system for transmitting and receiving a three-level signal and method of operating the same Provided is an optical interconnection system that transmits and receives a three-level signal. The optical interconnection system includes a first and a second optical interconnection device that transmits and receives a two-level signal, and a synthesizer that out... | 01/17/2012 |
| 8090267 | Complementary optical wiring apparatus A complementary optical wiring apparatus includes an optical transmitter, first and second optical transmission lines, and an optical receiver, the optical transmitter has a first operation mode of transmitting an optical signal synchronized with the rising of one e... | 01/03/2012 |
| 8014681 | Device with optically transparent housing for conducting light signals and methods of manufacture and use A device can convert electrical signals into modulated light signals and conduct those modulated light signals between components within the device or between the device and another device through at least a portion of the housing of the device that is transparent t... | 09/06/2011 |
| 8009993 | Hybrid balanced coding scheme A hybrid balanced code is formed from a low rate (narrow bandwidth) balanced code and a high rate (wide bandwidth) low density code. Data encoded using the hybrid balanced code is transmitted between a first communication network entity and a second communication ne... | 08/30/2011 |
| 8000609 | Communicating or reproducing an audible sound The present invention relates to the communication or reproduction of sound, in particular audible sound. There is provided a method of communicating a sound, including the steps of: transmitting, onto an optical link, pairs of signal copies, the signal copies of a ... | 08/16/2011 |
| 7907849 | Secure communication system and method for exchanging data units A communication system, the communication system includes: a first decision entity; and a long laser that includes a first reflector and a second reflector; wherein a lasing characteristic of the long laser is responsive to: (i) first data unit that is provided by a... | 03/15/2011 |
| 7907850 | Optical communication device and quantum key distribution system using the same An optical communication apparatus that can perform stable intensity and phase modulation on an optical pulse at high speed is provided, as well as a quantum key distribution system using the apparatus. Using multilevel signals for the electric signals (RF1, ... | 03/15/2011 |
| 7889994 | Installation for conveying a first plurality of electrical signals carried by a first triaxial cable to a second triaxial cable The present invention relates to an installation for conveying electrical signals carried by a first triaxial cable (1) to a second triaxial cable (18). It comprises: a first interface (15) between the first triaxial cable (1) and a fiber... | 02/15/2011 |
| 7860398 | Laser drivers for closed path optical cables Simplified laser drivers for closed path digital optical cables and digital optical cables including the simplified laser drivers. The laser driver can include less transistors than conventional laser drivers for optical communication cables. The laser can include a... | 12/28/2010 |
| 7848655 | Mode-locked optical amplifier as a source for a wdm-WDM hierarchy architecture The present invention relates to advances in the field of reconfigurable optical networks. In particular, the present invention provides improvements in the technology of light sources for use in optical networks. The optical network according to the present inventi... | 12/07/2010 |
| 7751718 | Efficient transmission of digital return path data in cable television return path An efficient means for transmitting digitized return path signals over a cable television return path is disclosed. In one embodiment of the invention, the cable television return path includes a node that receives an analog return signal from a subtree of the cable... | 07/06/2010 |
| 7725036 | Efficient transmission of digital return path data in cable television return path An efficient means for transmitting digitized return path signals over a cable television return path is disclosed. In one embodiment of the invention, the cable television return path includes a node that receives an analog return signal from a subtree of the cable... | 05/25/2010 |
| 7653315 | Bi-directional optical monitor interconnect The present invention is directed to a bi-directional optical monitor interconnect. The bi-directional monitor interconnect of the present invention includes an optical conductor with a first and second end. Disposed on the first end of the optical conductor is a fi... | 01/26/2010 |
| 7596323 | Optical communications systems, devices, and methods A method and apparatus for estimating fiber dispersion in an optical communication system including transmitting an optical signal carrying a unique word along an optical communication path, receiving the optical signal carrying the unique word from the optical comm... | 09/29/2009 |
| 7542682 | Millimeter wave transmitter using optical heterodyning An integrated device transmits and/or receives information by means of millimetric waves (wavelength 1 mm-10 mm), frequencies of 30 to 300 Ghz. The device has an optoelectronic integrated circuit that interfaces with an antenna able to transmit and/or receive millim... | 06/02/2009 |
| 7539421 | Self-contained secure videoconferencing console Disclosed is a secure/non-secure bypass switch, including at least one input port for receiving signals; a control module for determining if a secure or a non-secure operating mode is selected; if a non-secure mode is selected, configuring at least one relay to rout... | 05/26/2009 |
| 7519298 | VWS secure/non-secure bypass switch Disclosed is a secure/non-secure bypass switch, comprising a first port for receiving input signals; a first relay having an input, a first output and a second output, said input connected to said first port, and said second output connected to a second port; a firs... | 04/14/2009 |
| 7493049 | Audio Optic Cable An invention is disclosed whereby an analog audio signal are transmitted over distances through a flexible medium using electro-optical radiation as the carrier of the audio signal. The analog audio signal is never converted into a digital mode nor is the signal eve... | 02/17/2009 |
| 7489872 | Optical fiber system and method for carrying both CATV and Ethernet signals The present invention is an optical fiber system and method for carrying both CATV and Ethernet signals. The digital signals are translated into higher band by a direct up/down conversion so that analog signals and digital signals are treated as different frequency ... | 02/10/2009 |
| 7440702 | Method for transmitting digital image signal, digital image transmitting device, digital image sending device and digital image receiver A multiplexer of a transmission section generates a clock signal by multiplying a reference clock signal of a digital image signal by a predetermined number ‘K’. A parallel digital image signal is converted into a serial digital signal on the basis of the clock ... | 10/21/2008 |
| 7437080 | Optical transmission system having optimized filter wavelength offsets An optical transmission system having optical transmit and receive filters having passbands adjusted or selected for opposite and equal wavelength offsets from the optical wavelength of a carrier or the channel center wavelength. ... | 10/14/2008 |
| 7433602 | Implementation of gradual impedance gradient transmission line for optimized matching in fiber optic transmitter laser drivers A transmitter in a fiber optic system is provided, including a driver circuit, a light emitting source, and transmission lines. The driver circuit is configured to receive a modulated electrical signal and to have a driver circuit output impedance. The light emittin... | 10/07/2008 |
| 7427164 | Optical connector arrangement comprising a converter The invention relates to an optical connector arrangement wherein the connector and the converter are connected by short plastic fiber sections. The aim of the invention is to provide one such connector arrangement which can be produced in a simple and cost-effectiv... | 09/23/2008 |
| 7424228 | High dynamic range radio frequency to optical link A communication system includes an optical transmitter which is differentially driven and an optical receiver that outputs a differential signal. The optical transmitter creates the differential drive signal from an input signal and delivers the differential drive s... | 09/09/2008 |
| 7421209 | Optical wavelength multiplexing FSK modulation method An optical wavelength multiplexing frequency shift keying modulation system. The system includes an optical wavelength multiplexing signal acquisition unit for outputting an optical wavelength multiplexing signal. A n optical frequency shift keying modulation unit a... | 09/02/2008 |
| 7418212 | Electrical detection of optical symbols A system and method for detecting digital symbols carried in a received optical signal. The system comprises a functional element operative to receive a stream of samples of an electrical signal derived from the received optical signal and to evaluate a non-linear f... | 08/26/2008 |
| 7412116 | Optical device for simultaneously generating and processing optical codes The invention relates to an optical device, apt to generate and process optical codes at least one wavelength, comprising P inputs s, with 1≦s≦P, and P≧1, and N outputs k, with 1≦k≦N and N≧1, characterized in that it is apt to simultaneously generate and... | 08/12/2008 |
| 7406265 | Fiber optic communication signal link apparatus A fiber optic communication signal link apparatus for performing fiber optic link communication including a transmitter apparatus and a receiver apparatus coupled by a fiber optic cable. The transmitter is capable of detecting and modulating data that includes at le... | 07/29/2008 |
| 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 |
| 7398022 | Optical return-to-zero phase-shift keying with improved transmitters An apparatus and a method for transmitting at least a digital optical signal with return-to-zero phase-shift keying, employing a single optical modulator with dual-drive design, the encoded optical signal having improved spectral efficiency and performances and bein... | 07/08/2008 |
| 7394989 | Signal transmission device A transmission unit of a signal transmission device includes: a transmission-side detection unit that detects image information from an inputted electrical signal; a receiving unit that receives, from a reception unit, a status signal representing an arrival status ... | 07/01/2008 |
| 7391977 | Monitoring mechanisms for optical systems This application describes optical monitoring devices and applications in optical systems for monitoring various optical parameters of light, including the signal to noise ratio, the degree of polarization, and the differential group delay (DGD). ... | 06/24/2008 |
| 7389048 | Optical wavelength-division multiple access system and optical network unit The present invention provides an optical wavelength-division multiple access system and a corresponding optical network unit. A wavelength band Da (wavelengths λd1 to λdn) for downlink optical signals corresponding to the n ONUs, a wavelength band Ua (wave... | 06/17/2008 |
| 7386200 | Photonic circuit board A photonic circuit board comprises a connection setting circuit, a group of electric wires for connecting the connection setting circuit and a plurality of devices, an optical I/O (input/output) device connected to the connection setting circuit and a two dimensiona... | 06/10/2008 |
