VERFAHREN ZUR KOHAERENTEN ERFASSUNG UND DEMODULATION EINER SICH IN IRGENDEINEM POLARISATIONSZUSTAND BEFINDENDEN, PHASENMODULIERTEN TRAEGERWELLE UND VORRICHTUNG ZUR DURCHFUEHRUNG DES VERFAHRENS

摘要

Process for the coherent detection and demodulation of a carrier wave in a variable polarization state and apparatus for performing this process. According to the invention, the incident wave is subdivided into two components having orthogonal polarization states and these two components form the object of a coherent detection. For this purpose, a local oscillator supplies a local wave, which is itself divided into two components having orthogonal polarization states, which supply two detection - demodulation channels. The demodulation signals of these two channels are combined, and in particular added, and the resulting signal makes it possible to recover the information independently of the polarization state of the incident wave. Application to optical transmission.