COHERENT SIGNAL PROCESSOR

摘要

PURPOSE:To couple a light signal coherently and to utilize the speediness and band broadness of an optical waveguide by combining variable branching devices and phase shifters and performing optional weighting. CONSTITUTION:The variable branching devices S0, S1... Sn-1 distribute light signals which have electric field amplitudes at an optional branch ratio to respective taps and the branch ratio shows the absolute value of the weighing coefficient of each tap. The light signals which are distributed to the respective taps are phase-shifted optionally by the phase shifters P0, P1... Pn-1 and added after being multiplied not only non-negative real number coefficients, but also by optional weighting coefficients including complex numbers. Consequently, the signal processor which enables coherent coupling by using the optical waveguide as a delay line is obtained.