Patent ID: 6718143
Filing Date: 2004-04-06
Classification: G02B,H04B

Abstract:
An optical phase modulation decoding system comprising:an optical receiver that receives and outputs a pair of optical signals having phase modulation encoding; a fringe generator responsive to the pair of optical signals output from the optical receiver and configured to generate and output a plurality of optical fringes; a phase sampler responsive to the plurality of optical fringes and configured to generate and output a set of at least three phase offset signals that are sampled from and associated with each optical fringe, each phase offset signal of each set of at least three phase offset signals having a unique and known phase difference relative to the phase of the optical fringe associated with the set of at least three phase offset signals; and a phase processor responsive to each set of at least three phase offset signals and deriving therefrom a quantitative representation of the phase modulation encoding of the pair of phase encoded optical signals.