Patent ID: 7738798
Filing Date: 2010-06-15
Classification: H04B

Abstract:
1. A system for demodulating an optical differential phase shift keyed (DPSK) input signal to obtain a bit pattern for the optical DPSK input signal, comprising: an etalon filter for receiving an optical DPSK input signal and generating a transmitted wavefront component therefrom each time a phase shift occurs in said optical DPSK input signal; and a detector system for detecting said transmitted wavefront component to enable bit transitions in a data sequence of said optical DPSK input signal to be detected, and said optical DPSK input signal to be reconstructed as a digital output signal; the detector system including: a comparator for comparing electrical signals generated in accordance with the transmitted wavefront and generating a series of pulses in response to changes in the transmitted wavefront, and a component for sensing edges of the series of pulses and generating the digital output signal.