RED-C OPTICAL NETWORKS LTD. Patent applications |
Patent application number | Title | Published |
20140022626 | HYBRID OPTICAL AMPLIFIER WITH OPTIMIZED NOISE FIGURE - Methods for optimizing a noise figure of a variable gain hybrid amplifier (HA) which includes a variable gain Raman amplifier with adjustable average gain G | 01-23-2014 |
20120033293 | METHOD AND APPARATUS OF DETECTING AN OPENING IN AN OPTICAL TRANSMISSION FIBER OF A ROPA SYSTEM - Method and apparatus for detecting an opening in a transmission fiber connecting a discrete gain unit to a pump unit of a Remote Optically Pumped Amplifier (ROPA) system. The method comprises measuring an optical power entering the pump unit from the transmission fiber, the optical power being in a selected wavelength range, and establishing that the optical power lacks an ASE noise power component generated by the gain unit. The lack of this component indicates the presence of a break or opening in the transmission fiber, and triggers corrective action whereby pump lasers within the pump unit are shut down or have their power reduced to a safe level. | 02-09-2012 |
20110141552 | AUTOMATIC MEASUREMENT AND GAIN CONTROL OF DISTRIBUTED RAMAN AMPLIFIERS - Apparatus and method for gain measurement and control of a Distributed Raman Amplifier (DRA). Various embodiments of the apparatus include a detection unit operative to measure, during operation of the DRA, the optical power of a filtered component of the light entering the DRA from the transmission fiber and a gain calculation and control unit coupled to the detection unit and operative to calculate a signal Raman gain property from the measured optical power. The filtered component may exemplarily be a result of passing the light through a band pass filter, a spectral filter with a given spectral shape or a notch filter. The signal Raman gain property may be an average on-off signal Raman gain, an average net signal Raman gain or a signal Raman gain tilt within a communication band. The apparatus and method may be used to operate the DRA in Automatic Gain Control, i.e. to maintain a required constant signal Raman gain and/or signal Raman gain tilt. | 06-16-2011 |