Patent ID: 7590358
Filing Date: 2009-09-15
Classification: H04B

Abstract:
1. An optical regenerative amplifier for regenerative amplification of a binary phase shift-keying sequence of signals having a predetermined time slot between any adjacent signals comprising: (i) a first delay interferometer, wherein an input sequence of signals is split between two arms of the interferometer, a relative delay by the time slot between the adjacent signals being introduced in one of the arms of the interferometer, the first delay interferometer outputting a first and a second trains of amplitude shift keying signals, the first train being anti-symmetric to the second train, the amplitude shift keying signal consisted of marks and spaces; (ii) a discriminative limiting amplifier amplifying the first and the second trains of anti-symmetric amplitude shift keying signals, wherein the discriminative amplifier performing amplification for the spaces being smaller compared to the amplification for the marks and the amplification for the marks being limiting; (iii) a second delay interferometer, wherein the second delay interferometer is identical to the first delay interferometer.