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Match Document Document Title
7623793 System and method of configuring fiber optic communication channels between arrays of emitters and detectors  
A system for configuring fiber optic communication channels between arrays of emitters and detectors comprises: an array of light emitters; an array of light detectors; a bundle of optical fibers...
7580634 Transmission method, transmitter-receiver, and transmitting-receiving system  
A transmitter-receiver having a means for automatically determining the status of transmission medium such as optical fiber, and a means for automatically setting and resetting the transmission...
7526200 Wavelength-division multiplexing optical transmitter  
An optical transmission apparatus includes optical transmitters for transmitting optical signals and first monitor units for monitoring optical signals from the optical transmitters. A multiplexer...
7519300 Optical output control method for use in optical transmission node and optical output control apparatus for use in the same  
In an optical transmission node network in which a first optical transmission node is connected with a second optical transmission nodes through an optical fiber cable and automatic optical output...
7499646 Fast fault notifications of an optical network  
A method and apparatus for fault notification in an optical network are described herein. In one embodiment, an exemplary process includes detecting at a node that at least a portion of a first...
7447430 Optical cross connect apparatus and optical transmission system  
Disclosed is an optical cross connect apparatus that is applicable to an end office node and relay node in a path. The optical cross connect apparatus includes an optical switch for generating...
7437069 Automatic power restoring method and optical communication system  
The present invention provides an automatic power restoring method capable of reliably detecting continuity by the dissolution of a line fault, to restore the optical power, even in a structure...
7433595 Optical signal transmission apparatus and optical signal transmission method  
The present invention provides an optical signal transmission apparatus for carrying out bi-directional light transmission. The optical signal transmission apparatus includes: a light sending...
7430373 Optical node processor, optical network system and its control method  
An optimum optical node processor is provided to a metropolitan network in which the distance of a transmission line between each optical node processor is short. The optical node processor...
7428354 System for detecting fault in optical-transmission path  
An optical transmission-path fault-detection system for detecting a fault in an optical-transmission path connecting an optical communications apparatus and an optical amplifier corresponding to...
7424221 Optical network terminal with illegal transmission detection circuitry  
An optical network terminal, which includes an optical transmitter, monitors the status of the optical transmitter, such as the output or the power consumption of the optical transmitter, to...
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,...
7391971 Method and system for powering up an optical network  
A method for powering up an optical network is provided. The method comprises remotely and safely increasing power to optical links in the optical network while monitoring signal levels in the...
7376348 Optical communication system  
An optical transmission equipment in an optical communication system interconnecting two optical transmission equipment sets by a main transmission line and a backup transmission line. An optical...
7308205 Optical transmission apparatus  
In an optical transmission apparatus in which a plurality of nodes are optically connected to one another via an optical transmission path, a light signal which is coded so that a mixture ratio of...
7302352 Method and system for providing dying gasp support for a network component  
A method for providing dying gasp support for a network component is disclosed. The method includes detecting an imminent loss of power to the network component and disabling all sub-systems of the...
7286758 Method for switching transmission route, and optical transmission device  
A method for switching a transmission route in an optical network. A regenerator station extracts a main signal, and detects the input level of the main signal. When the input level falls below a...
7280470 Ring network for sharing protection resource by working communication paths  
Multiple working paths are established on each working rings and multiple protection paths are established on each of multiple protection rings. A working path on a first working ring spans across...
7263285 Method, apparatus and system for the automatic provisioning of a network element  
A method for the automatic provisioning of a network element (NE) includes receiving a client signal at a tunable optical translator (OT) in the NE, determining the set of channels supported by the...
7248797 Transmitter-receiver device and a communication system  
The invention concerns a transmitter-receiver device (A, B) which comprises a receiver unit (RXA) arranged to receive light and optical signals from a transmitter unit (TXA) arranged to transmit...
7218442 Optical communications system with fiber break detection in the presence of Raman amplification  
An optical communications system initiates automatic power reduction by selecting a portion of a Raman optical pumping signal from optical signals propagating on an optical fiber span. A signal...
7178992 Apparatus and method of signal detection in an optical transceiver  
The present invention includes an optical transceiver having a fiber module with an optical data input and an electrical data output. The fiber module further includes a signal detect output that...
7177074 Circuit and method for safety shutdown of an optical amplifier  
A circuit and associated method for safety shutdown of an optical amplifier, wherein the power of an amplified spontaneous emission ASE is subject to a correction factor and subtracted from a...
7174108 Transmission device and repeater  
A transmission system is provided that recognizes occurrence of a fault efficiently so that the workability and quality of service can be improved. An optical amplifier part amplifies an optical...
7139484 Signal transmission method in WDM transmission system, and WDM terminal, optical add-drop multiplexer node, and network element used in the same system  
Disclosed herein is a signal transmission method in a wavelength-division-multiplex (WDM) transmission system. The WDM transmission system comprises a first WDM terminal for transmitting a WDM...
7136584 Optical output power automatic attenuation circuit for optical communication apparatus  
An optical amplifier to which an optical output power automatic attenuation circuit according to the present invention is applied, comprises: one amplifier board to and from which a WDM light is...
7133610 Optical sender, terminal device, and optical communication system each having the optical sender  
The present invention relates to an optical sender applicable to WDM (wavelength division multiplexing), and a primary object of the present invention is to prevent interchannel crosstalk in WDM....
7113699 Fault forwarding in an optical network  
A system and method for forwarding fault information in an optical network is disclosed. Responsive to a fault being detected at a node, the fault information is forwarded to the destination node...
7106965 Wavelength division multiplex transmission system and communication device  
A wavelength division multiplex transmission system with substantial functions for avoidance of defects is provided. The system comprises an optical transmission device and an optical receiving...
7092630 Open fiber control for optical transceivers  
The present invention implements open fiber control in an optical transceiver. During normal operation, the transceiver transmits signals through a connection to an optical network. When the...
7039313 Automatic protection system for an optical transmission system  
An optical communication system and method for starting up and shutting down the system to ensure safety during repair of a fiber break are disclosed. A technique for shutting down an optical...
7031049 Loss point detecting method and distributed raman amplifier applying the same  
Power of scattered light separated from an optical transmission path is monitored, part of the excitation light is separated and power thereof is monitored, power of reflected light which passes in...
7015797 System and method of providing infra-red signals over power lines  
A method and system for transmitting infra-red (IR) signals through power lines. An IR signal may be received and substituted with a corresponding RF signal. The RF signal may be placed on a power...
6922531 Method and system for encoding optical communication information during automatic laser shutdown restart sequence  
A system and method for identifying one or more characteristics of an optical signal, in which a transmitter is operable to transmit an optical signal and a receiving unit is operable to receive...
6897424 Controlling a laser to stop output in accordance with detection of output lights corresponding to channels  
A parallel optical module is constructed to include a plurality of photodetectors (MD 1 , MD 2 ) which detect output lights of a plurality of arbitrary channels of a laser light source ( 3 ) having...
6839516 Apparatus and method for visualizing an automatic laser shutdown state in an optical transmission system  
An apparatus and method are disclosed for visualizing an automatic laser shutdown (ALS) state. An operator is informed of the ALS state by transmitting a visible light with weak power, to an...
6839515 Method for establishing a communication on a standby link in optical transmission facilities  
A method for standby switching in optical transmission devices is provided, wherein, in addition to a working signal and a protection signal, respective control signals with information concerning...
6823138 Optical communications terminal station, optical signal transmission method, and optical signal increasing method in wavelength multiplexing system  
An OPC generates a pump light having the wavelength λs with a power larger than a threshold for generating a nonlinear effect in an optical fiber for a main signal having the wavelengths λ 1 ...
6810210 Communication path impairment detection for duplex optic communication link  
A communication path impairment detection module for connection to a duplex optic communication link is provided. The duplex optic communication link includes an outgoing communication path and an...
6807001 Auto shutdown for distributed raman amplifiers on optical communication systems  
A method and apparatus for detecting if an optical module has been disconnected from a fiber span or if there has been a break in the span, and for automatically reducing the output signal level of...
6798990 Laser safety method for DC coupled parallel optical link  
A method and apparatus are provided to ensure that laser optical power does not exceed a “safe” level in a DC coupled open loop parallel optical link in the event that a fiber optic ribbon...
6766117 Network system  
The invention provides a network system for laser processing, comprising at least two laser devices and a workstation with a laser processing head which can be operated safely. A first light guide...
6734411 Method and apparatus for controlling power levels of optical signals in optical fiber interconnects  
In the method and apparatus for providing an optical fiber interconnect, a transmitter transmits an optical signal through an optical fiber. The transmitter does not transmit to a controller,...
6735390 Method and apparatus for terminating optical links in an optical network  
A method and apparatus are disclosed for terminating optical links in an opticalnetwork based on performance requirements. The present invention forces the termination of the received optical...
6724993 Optical transmitter-receiver  
An optical transmitter-receiver that does not have a harmful effect on the human eye when an optical fiber is disconnected from the apparatus and is able to determine easily when the fiber has been...
6681079 Optical fibre monitoring system  
The present invention provides a method of monitoring a transmission fiber including the steps of transmitting a monitor signal on the transmission fiber in a direction opposite to the propagation...
6678477 Spatial transmission optical transceiver  
In a spatial transmission optical transceiver, signals of two lines from a feeder-affixed twisted pair line 17 which is a data transmission line based on IEEE1394 standard are converted to...
6650839 Method and apparatus for optical media access protection in a passive optical network  
An apparatus and method is disclosed for protecting access to a shared medium in an optical communications system which has plural remote terminals coupled to a central terminal over the shared...
6634807 Optical transmission system including performance optimization  
Vulnerability of an optical network to channel impairments or the like, is addressed by utilizing real-time monitoring and control of prescribed optical channel impairments. The impairments are...
6628871 Fiber fuse protection  
A method of routing of signals through an optical network involves determining a route through the network for which the power level within each branch of the network along the route is below a...
Matches 1 - 50 out of 93 1 2 >