Abstract: The invention provides a system for use in an optical communication network to reduce noise comprising means for tapping a low noise signal from said network and a phase sensitive amplifier (PSA) for conditioning said tapped signal by means for removing modulation of the tapped signal to allow for phase locking of the tapped signal. A laser source provides phase locked reference signals to generate at least one pump signal, wherein the at least one pump signal provides correct phase alignment for optimum PSA operation. The invention makes use of injection locked and/or phase locked laser sources in conjunction with low power input tap couplers, or post/mid amplification taps to provide the required phase locked reference signals without degrading the input loss or noise. The use of injection/phase locked local lasers suppresses the detrimental impact of the low tapped power or added noise in the generation of the required pump signals.
Type:
Application
Filed:
December 3, 2010
Publication date:
May 23, 2013
Applicants:
CHALMERS UNIVERSITY OF TECHNOLOGY, University College Cork, National University of Ireland, UNIVERSITY OF SOUTHAMPTON, NATIONAL AND KAPODESTRIAN UNIVERSITY OF ATHENS
Inventors:
Andrew Ellis, Stylianos Sygletos, Peter Andrekson, Antonio Bogris, David Richardson, Dimitris Syvridis