Matches 201 - 250 out of 375 < 1 2 3 4 5 6 7 8 >
Match Document Document Title
5933261 Information processing method and system  
An information processing system has a plurality of nodes each including one or more CPUs that utilize monitoring of a common bus, wherein the plurality of nodes are connected to one another by a...
5926297 Optical modulating device and optical modulating method  
An optical modulating method and an optical modulating device for optical time division multiplexing (OTDM). The optical modulating device comprises, for example, an optical switch for generating...
5923455 Data identifying device and light receiver using the same  
A device for identifying input data by using a first clock signal includes a first identifying unit which identifies the input data by using the first clock signal to generate first identified data...
5917633 Method of and device for controlling the phase of a clock signal in a point-to-point optical transmission  
The signal to be controlled is sent along an optical fiber by a wavelength tunable laser whose emission wavelength may be varied as a function of a possible phase variation in the received signal...
5917627 Optical TDM transmission system  
In an optical TDM transmission system in which a set of N tributary channels at one bit rate are multiplexed on to a single multiplexed channel at N times the bit rate of the tributary channels, an...
5898512 Link establishing system and link establishing method  
A link establishing system according to the present invention is constituted by connecting between an upper device and a lower device a pair of optical transmission devices which have the same...
5889602 Optical hinge  
An optical hinge (20) provides one or more free space optical communication links through the hinge (17) of an instrument (10). The optical links include a transmitter (24) in one section (14) of...
5881086 Optical semiconductor device with quantum wires, fabrication method thereof, and light source apparatus, and optical communication system using the same  
An optical semiconductor device includes a semiconductor substrate, a first region formed on the substrate and a second region formed on the substrate. The first region has a first active layer,...
5841563 Method and system for efficient optical transmission of NTSC video  
A technique for delivering analog video over fiber-to-the-home (FTTH) networks addresses a fundamental problem of the standard signal format, i.e., power budget constraint, by increasing the usable...
5838475 Optical regenerator and an optical transmission system  
A a first clock extraction device included in the receiving section of the optical regenerator recovers a receiving clock. The receiving clock follows the jitter contained in a receiving optical...
5828679 Optical clock signal extraction using non-linear optical modulator  
A non-linear semiconductor optical device includes an active waveguide with a multiple quantum well construction in the active region. The device is supplied with a drive current at the material...
5812296 Fiber optics transmission system  
In a fiber optics transmission system in which a plurality of access units are cascade-connected via up-link and down-link optical fiber lines and connected to a base unit, the base unit has a beat...
5786922 Dual signal subharmonic carrier for systems with unknown delay  
A system used with a system having a carrier delay to determine the phase of a signal before the delay and to recover the signal after the delay. Two signals at different frequencies are sent...
5777766 Method and device for optically recovering the synchronism of an optical digital signal  
The device and method are based on tapping off a predetermined line signal fraction and inputting it, together with a continuous pumping radiation, to a resonant cavity which comprises a non-linear...
5777765 Optical delay unit, optical line emulator including such a unit and methods realized by such an optical delay unit and by such an optical line emulator  
The optical delay unit (ODL) introduces a programmable delay of an optical signal on an optical signal path. The delay of the optical signal is realised by converting the incoming optical signal...
5774242 Eye mask for measurement of distortion in optical transmission systems  
A performance evaluation analysis for optical transmission systems is disclosed. A reference eye mask is defined for a transmitter and for a reference optical transmission link. The quality of the...
5774246 Apparatus for demultiplexing an optical digital signal  
A demultiplexing apparatus is disclosed which comprises a pulse generator (4), a phase control device (3), and an optical switching device (1), e.g., a NOLM. The phase control device (3) controls...
5767995 System and methods for assessing the suitability of analog lasers for broadband access applications  
A system and method for predicting the ratio of the strength of the carrier signal to the strength of nonlinear distortion (C/NLD) generated by a communications laser is disclosed. The method...
5764396 Optical regenerative circuit  
The optical regenerative circuit comprises: branching circuit for supplying a received optical data signal to two branch circuits; optical clock generator circuit for generating an optical clock...
5754325 Optical regenerating circuit  
In a data communication system, a circuit for regenerating an optical signal that is deteriorated during the course of transmission has an optical clock generator for generating an optical clock...
5710650 Dispersion-reducing multiple wavelength division multiplexing optical fiber transceiver and methods for using and assembling same  
A dispersion tolerant OC-192 optical transceiver includes the circuitry for implementing the method of reducing optical signal dispersion in a high data rate data stream that travels on an optical...
5677779 Optical communications module  
A compact, low-cost combined transmitting/receiving optical communications module, which is suitable for use in a TCM system and which is capable of normal operation over a particularly wide...
5677895 Apparatus and methods for setting timepieces  
Apparatus and methods are provided for setting timepieces. A system for setting timepieces includes a television signal receiver having a first clock for keeping time in the television signal...
5673133 Phase synchronization system  
The invention has the object of offering a phase synchronization system for wavelength division multiplexed bi-directional communications systems which can perform high-precision phase...
5673130 Circuit and method of encoding and decoding digital data transmitted along optical fibers  
A data transmitter (12) transmits parallel data as light pulses over multiple optical channels (14). A data receiver (16) converts the light pulses back to a voltage level and compares the voltage...
5661583 Fiber optical data interface system  
A coupler device is disclosed that establishes an optical link between elrical equipment operated in accordance with a protocol defined by the requirements of a Navy Tactical Data System. The...
5654815 Synchronization method as well as synchronizing units, terminal and exchange therefor  
Rather than synchronizing clocks between two stations in an optical communication system by correlating a received synchronization signal with an own-station synchronization signal and controlling...
5652767 Data decision circuit used in optical parallel receiving module, optical parallel receiving module, optical parallel transmission system and terminal structure of optical transmission fiber  
An optical parallel receiving module receives optical signals transmitted in parallel in a plurality of channels by using optical fibers. The optical parallel receiving module includes...
5652669 Optical synchronization arrangement  
In a sychronizing arrangement for synchronizing two streams of optical pulses, the problem arises that for pulse frequencies above 10 GHz the operation of the synchronizing arrangement becomes...
5646758 Optical time compression multiplexing transmission system  
The present invention provides an optical time compression multiplexing transmission system which suppresses the influence of optical reflection by a simple configuration without degrading...
5636264 Radio telephone system which utilizes an infrared signal communication link  
A radio telephone system comprising a transceiver unit and an external device, such as a handset, computer or telecopier, in wireless infrared signal communication with the transceiver unit. The...
5629983 Parallel transmission through plurality of optical fibers  
In one aspect of the present invention, a coding part of a transmitter side codes N series of input data into N+1 series of transmission data so that each of N+1 series of transmission data have...
5625480 Control circuits for parallel optical interconnects  
Simple and efficient electronic circuits and methods are disclosed for better use of parallel optical interconnect system transmitting a plurality of dc NRZ data and an independent clock signal....
5617233 Transparent optical node structure  
A transparent optical node (TON) structure for use in a two-connected optical packet switching architecture. The TON is used in an interconnect employing deflection routing with two wavelength...
5598290 Data transfer apparatus utilizing infrared rays  
A data transfer apparatus utilizing infrared rays characterized in that one transmission unit of transmission data formed by combining digital data comprising a bit row represented by two values...
5585954 Apparatus for measuring optical transmission characteristic  
An apparatus for measuring optical transmission characteristic, which has an input unit of data signal and of clock pulses, a signal decision unit, a display unit and a control unit. The signal...
5585623 Method and apparatus for detecting a light signal in the presence of noise  
An apparatus for detecting a light signal is provided which includes a first frequency source for generating a clock signal having a fixed frequency, a light emitting portion constituted of at...
5581390 Apparatus and method for conveying frame timing, data timing, and data  
A space-based communications network (10) includes satellites (12) placed in low-earth orbits (14). Satellites (12) engage in bulk communications with central switching offices (CSOs 22) and round...
5572349 Communications system  
A communications system having a line terminal(1), a plurality of customer terminals (2), and a passive optical network for supporting traffic between the line terminal and the customer terminals....
5557437 Optical terminal system having self-monitoring function  
An optical terminal system having self-monitoring function is disclosed, which includes a high-level group loopback section for internally looping back a serial electric signal, a low-level group...
5552921 Method of common transfer of digital, audio and control data on a common bus line; bus system for implementing the method and interface application in the method  
A bus system for the transfer of audio and control data on a common bus line of fiber optic cables (LWL) in a system of users is compatible with sources and sinks of audio data (2,2a,2b) and/or...
5543951 Method for receive-side clock supply for video signals digitally transmitted with ATM in fiber/coaxial subscriber line networks  
For the receive-side clock supply for digital signals, such as digital data-compressed TV distribution signals, transmitted from a digital signal source, such as a TV signal source, via a...
5541759 Single fiber transceiver and network  
A single fiber transceiver is for use in a node of a single fiber network. The transceiver repeats signals received from one node to the next node. The node may have a processor, such as a sensor...
5539846 System and method for transmitting parallel signals via an optical transmission path  
A parallel signal transmission system for transmitting parallel signals from a transmission unit to a reception unit via an optical fiber, at a low cost without spoiling their quality. The...
5537241 Telecommunications system  
Error-free or rapid protection switching between two basestations, one main and one standby, or two transmitters (1,2) etc. of one basestation (8) is achieved using a downstream marshalling scheme...
5535032 Optical parallel-serial converter and optical serial-parallel converter  
The high transmission capacity of an optical transmission path (about 200,000 km Mbit/s) is used, among others, to couple several data sources and data sinks to an optical waveguide. The task of...
5532858 Optical radio transmission system and a method for adjusting optical axes thereof  
An optical radio communication system comprising a first light transmitting system and a second light transmitting system. Each of said first and second light transmitting system comprising a...
5519389 Signal synchronized digital frequency discriminator  
A digital frequency discriminator processes input pulses including first and second time separated input pulses to determine if the frequency of any two sequential pulses lie within a predetermined...
5515196 Optical intensity and phase modulators in an optical transmitter apparatus  
An optical transmitter apparatus comprises a light source for optical signal transmission, an intensity modulator, a transmit signal generator and a signal generator. A transmit signal to be...
5504610 Optical mixer and its use  
The optical mixer (1) contains a polarization-maintaining length of optical waveguide (4) as a mixing element. The pump light (P) is coupled to the optical mixer in so that its plane of...
Matches 201 - 250 out of 375 < 1 2 3 4 5 6 7 8 >