Patent ID: 6256130
Filing Date: 2001-07-03
Classification: H04B

Abstract:
A method for optical transmission of light over a fiber optic network comprising at least one optical transmitter (1), a fiber optic link (2), and at least one optical receiver (3), the optical transmitter (1) including means (5) for modulating the light in response to a modulating signal (9), and the optical receiver (3) including a photodiode (5) and an electronic filter (6), characterized by generating a continuous wave light signal (P.sub.cw) and a pulse modulated signal (P.sub.m) in the optical transmitter for transmission over said link as two miscible spatially coherent light signals having a same polarization, and by evaluating a signal (P.sub.bit) resulting from a coherent mixing of the pulse modulated signal (P.sub.m) and the continuous-wave light signal (P.sub.cw) in the optical receiver after transmission over said link for recovering one or more pulses of said pulse modulated signal.