METHOD FOR THE COHERENT DETECTION AND DEMODULATION OF A MODULATED CARRIER WAVE WITH A VARIABLE POLARIZATION STATE AND DEVICE FOR IMPLEMENTING THE SAME

摘要

P METHOD FOR COHERENT DETECTION AND DEMODULATION OF A CARRIER WAVE WITH A VARIABLE POLARIZATION STATE AND DEVICE FOR IMPLEMENTING IT. / P P ACCORDING TO THE INVENTION, THE INCIDING WAVE12 IS SHARED INTO TWO COMPONENTS14, 16 ORTHOGONAL POLARIZATION STATES AND THESE TWO COMPONENTS ARE SUBJECT TO COHERENT DETECTION. FOR THIS, A LOCAL OSCILLATOR 20 DELIVERS A LOCAL WAVE ITSELF SCANNED INTO TWO COMPONENTS26, 32 ORTHOGONAL POLARIZATION STATES, WHICH POWER TWO DETECTION-DEMODULATION WAYS (36, 36, 40, 40). THE TWO-CHANNEL DEMODULATION SIGNALS (S, S) ARE COMBINED, ESPECIALLY ADDITIONED, AND THE RESULTANT SIGNAL ALLOWS INFORMATION RETURN INDEPENDENTLY OF THE INCIDING WAVE POLARIZATION STATE. / P P APPLICATION IN OPTICAL TRANSMISSION. / P