Optical signal processing apparatus and optical signal processing method

摘要

An optical signal processing apparatus (1) includes a mixer (13) and a first optical modulator (11). The mixer modulates a carrier signal of a first specific frequency (f j ) received from a first oscillator (12) with an information signal (B j ) to generate a subcarrier modulated signal (S j ). The first optical modulator (11) optically modulates, with the subcarrier modulated signal received from the mixer, carrier light (E 0 ) optically modulated by a second optical modulator (16) at a second specific frequency (f 0 ) received from a second oscillator (15) to generate and output modulated carrier light (E 0 ').