FIELD: physics.
SUBSTANCE: method of transmitting information and a method of picking up a useful signal involves generation of two waves in an emitter at the output of an optical transistor which operates based on the phenomenon of self-switching of power between two unidirectional distributed-coupled waves in a nonlinear optical element, wherein the power of said two waves varies in phase opposition, in accordance with the signal at the input of the optical transistor. That signal is picked up in the received radiation when waves pass through the propagation channel. To pick up the signal, three or four Stokes parameters or three or four coherence matrix elements for the carrier frequency of the radiation at the output of the optical transistor are measured. The useful signal is picked up by comparing the relationship between Stokes parameters or coherence matrix elements, measured after the waves pass through the propagation channel, with the same relationship between them, but calculated or measured at the output of optical transistor used.
EFFECT: high reliability, quality and volume of transmitting information, high noise immunity of the communication line and signal-to-noise ratio, ensuring additional security for transmitting information, reduced effect of noise of photodetectors on reception of an information signal.
25 cl, 8 dwg
