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| Number | Title | Issue Date |
| 7231146 | Optical communication system Communicating a signal includes receiving the signal at a primary device of a switching system, where the primary device is associated with a primary path along which the signal is propagating. A primary overmodulation signal associated with the primary path is gene... | 06/12/2007 |
| 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 communication system having spans of optical transmission fiber interspers... | 05/02/2006 |
| 7010231 | System and method of high-speed transmission and appropriate transmission apparatus At a receiver a 20 Gbit/s soliton bit stream (20) is demultiplexed into two 10 Gbit/s bit streams (22a, 22b) using a 2-way splitter (6), a clock extraction circuit (4), and a pair of polarization insensitive amplitude... | 03/07/2006 |
| 6925265 | System and method of high-speed transmission and appropriate transmission apparatus Soliton or soliton-like optical pulses with characteristics adapted to propagation in an optical line for RZ type transmission are generated by modulating a continuous optical signal (1) by means of a modulator (2) which is substantially devoid of chir... | 08/02/2005 |
| 6708001 | Method and apparatus for transmitting an internet protocol (IP) packet within a fiber optic network An embodiment includes an optical source, an optical receiver, and an interconnecting optical fiber. A data sequence is received and encoded or formatted as an IP packet using an encoding format capable of returning a signal representing the IP packet to a predeterm... | 03/16/2004 |
| 6661972 | Method and apparatus for transparent optical communication with two-fiber bidirectional ring with autoprotection and management of low priority traffic A closed-ring transparent optical communication network that provides for protection of the principal communication channel of each supported wavelength and supports occasional traffic on a separate channel. In the case of a breakdown of or degradation in... | 12/09/2003 |
| 6583905 | Apparatus and method for reducing SPM/GVD in optical systems An optical transmission system and method for reducing non-linear distortion caused by the interaction of Self-Phase Modulation and Group Velocity Dispersion is disclosed. An optical link includes a transmitter for providing signals at a first optical wav... | 06/24/2003 |
| 6583899 | 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 communication system having spans of optical transmission fiber... | 06/24/2003 |
| 6580530 | Optical communication system An optical communication system for communicating at least a first optical system. The optical communication system includes a first primary guided optical path and a first secondary guided optical path, through each of which the first optical signal is c... | 06/17/2003 |
| 6476949 | Dispersion compensation in optical fibre transmission An optical transmission apparatus for transmission of optical signals at an optical wavelength of about 1550 nanometers. The optical transmission apparatus includes a single mode optical fiber link formed of optical fiber having substantially zero dispers... | 11/05/2002 |
| 6456406 | Transparent optical self-healing-ring communication network An optical self-healing-ring communication network is described which includes: a first optical communication line, forming a closed optical path; at least two add/drop nodes for optical signals, optically connected along the line; a second optical commun... | 09/24/2002 |
| 6400476 | Method and apparatus for transparent optical communication with two-fiber bidirectional ring with autoprotection and management of low priority traffic A closed-ring transparent optical communication network that provides for protection of the principal communication channel of each supported wavelength and supports occasional traffic on a separate channel. In the case of a breakdown of or degradation in... | 06/04/2002 |
