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| Number | Title | Issue Date |
| 8190023 | Optical communication device, optical communication system, optical output control method and program An input of a command to stop optical output or a command to reduce optical output by a main signal transmitting section is received from the outside. When the input of the optical output stop command or optical output reduction command is received, an inter-device ... | 05/29/2012 |
| 8103163 | Method of controlling optical output power and passive optical network system using the same Provided are an optical output power control method that provides optical communication without harming the human body even when a transmission line is cut or no optical network unit (ONU) accesses a communication system, and a passive optical network (PON) system u... | 01/24/2012 |
| 8078052 | Protocol-less all-optical 1+1 bidirectional revertive linear protection system In an optical network a 1+1 bidirectional protection system is presented. Each node across a link has photodiodes to monitor the power of signals received by the node on receiving working and protection optical fibers and also optical switches connected to transmiss... | 12/13/2011 |
| 7941047 | Method for engineering connections in a dynamically reconfigurable photonic switched network A method for engineering of a connection in a WDM photonic network with a plurality of flexibility sites connected by links comprises calculating a physical end-to-end route between a source node and a destination node and setting-up a communication path along this ... | 05/10/2011 |
| 7912369 | Optical signal shutoff mechanism and associated system A mechanism for adjusting or shutting off an optical signal within a network system is provided. The system may include a generating element for providing an optical signal and a bi-directional coupler for transmitting the optical signal to downstream components and... | 03/22/2011 |
| 7835641 | Light emitter controlling Embodiments related to light emitter control are described and depicted. ... | 11/16/2010 |
| 7778543 | Passive optical network rogue optical network unit diagnostics A system, method, and computer readable medium for passive optical network rogue optical network unit diagnostics, comprises, detecting an alarm of a network, correlating the detected alarm to a bandwidth map, and selectively disabling an optical network unit upstre... | 08/17/2010 |
| 7729613 | Apparatus for optical path monitoring and an optical shutter for preventing signal transimission in a faulty optical path The invention provides an optical shutter (400) for a communication system of a type comprising first (B1, B2) and second (A1, A2) communication paths along which information-bearing radiation propagates in opposite... | 06/01/2010 |
| 7664392 | 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 including an optical amplification medium on an optical transmission pat... | 02/16/2010 |
| 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 including an optical amplification medium on an optical transmission pat... | 10/14/2008 |
| 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 module, for sending an optical main-signal having at least one data width,... | 10/07/2008 |
| 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 according to the invention is provided with an optical add/drop multiplexer ... | 09/30/2008 |
| 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 the communications apparatus is disclosed. The system includes a first ... | 09/23/2008 |
| 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 determine when the optical transmitter is illegally transmitting. When an i... | 09/09/2008 |
| 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 |
| 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 network to discover installation errors, incorrect equipment configuratio... | 06/24/2008 |
| 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 amplifier amplifies and outputs optical signals from one transmission ... | 05/20/2008 |
| 7359647 | Method and apparatus for transmitting and receiving power over optical fiber A method and apparatus for transmitting and receiving power over optical fiber is disclosed. In particular, a power over fiber system in which an optical network transmits electrical power via an optical signal and is also transmits data within the optical network a... | 04/15/2008 |
| 7356257 | Optical switching apparatus and optical communication network system An optical communication network system is disclosed, which includes an optical switching apparatus. The optical switching apparatus includes an optical switch for switching and setting routes of an optical signal without being converted, a control unit for instruct... | 04/08/2008 |
| 7340164 | Optical WDM transmission system An optical wavelength division multiplex transmission system (1) for transmitting optical signals (S) on a plurality of wavelength channels has a transmitting terminal (2) and a receiving terminal (3) interconnected by a transmission line (5 | 03/04/2008 |
| 7324189 | Light power adjusting method, optical transmitter, and optical receiver The present invention provides provide a light power adjusting method, an optical transmitter, and an optical receiver suitable for ensuring high data transmission quality by preventing the rapid increase in SBS which occurs when the light power exceeds a predetermi... | 01/29/2008 |
| 7321727 | Method for network commissioning using amplified spontaneous emission (ASE) sources This invention provides a method for commissioning an optical network using internal Automatic Spontaneous Emission (ASE) light inherently present in the optical network as a light source (the ASE light source) for measuring losses inside and between nodes in the ne... | 01/22/2008 |
| 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 1 and 0 constituting data is made close to 50% is transmitted through... | 12/11/2007 |
| 7302182 | Methods and apparatus for sensing multiple wavelengths simultaneously in a single wavelength sensing device A method and system provide for sensing multiple wavelengths simultaneously in a single wavelength sensing device. The system may have a plurality of laser signals and a plurality of identifiable modulation signals. A respective laser signal of the plurality of lase... | 11/27/2007 |
| 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 network component except a designated sub-system of the network comp... | 11/27/2007 |
| 7289428 | Inter-working mesh telecommunications networks A communication system (5) comprises a first network (10) including a source (11) arranged to transmit data and a second network (30) including a destination (31) arranged to receive the data. Interruptions in communication between... | 10/30/2007 |
| 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 threshold, the regenerator station determines that a failure occurs, a... | 10/23/2007 |
| 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 first and second nodes for signal transmission in a first direction o... | 10/09/2007 |
| 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 OT that are able to correspond to the client signal, eliminating the... | 08/28/2007 |
| 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 light and optical signals. The device also comprises a supervising unit... | 07/24/2007 |
| 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 related to a magnitude of the selected portion of the Raman optical pump... | 05/15/2007 |
| 7212740 | Transmitter-receiver device and a communication system The invention concerns a transmitter-receiver device (A, B) which comprises a receiver unit (RXA) for receiving optical signals and transmitter unit (TXA) for transmitting optical signals. Furthermore, the transmitter-receiver device (A, B) comprises a supervising u... | 05/01/2007 |
| 7187819 | Optical power distribution management and apparatus A method, apparatus and computer program are disclosed for managing the distribution of optical power to a plurality of optical data devices. The devices can be data storage drives, data replicators, fast optical search devices, or other components that use optical ... | 03/06/2007 |
| 7185815 | Device for controlling multiple types of electroluminescent devices A controller for an electroluminescent device includes an internal electroluminescent device system configuration database that includes configuration data stored in the controller for multiple electroluminescent device systems. A processor executes instructions fro... | 03/06/2007 |
| 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 indicates the receipt of valid optical data. A physical layer device h... | 02/20/2007 |
| 7181138 | Optical network connection test apparatus and methods A way of testing a wavelength division multiplexed (WDM) system without requiring connection to data source/sink equipment. A test signal is introduced onto a light path of interest in the system, and the test signal is monitored downstream for signal integrity. Lac... | 02/20/2007 |
| 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 measured signal extracted from the optical signal. ... | 02/13/2007 |
| 7173756 | Optical amplification system for variable span length WDM optical communication systems An optical communications system includes a plurality of optical fiber spans. An optical loss of one of the plurality of optical fiber spans is different from an optical loss of another one of the plurality of optical fiber spans. At least one of the plurality of op... | 02/06/2007 |
| 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 main signal. A fault occurrence recognizing part detects a pump light u... | 02/06/2007 |
| 7149430 | Optoelectronic transceiver having dual access to onboard diagnostics The optoelectronic transceiver includes first and second controller ICs. Each controller IC includes logic, a memory, an interface, and at least one input port. Each memory is configured to store digital diagnostic data and has a unique serial device address to allo... | 12/12/2006 |
