How to suppress the desired subcarrier of light orthogonal frequency division multiplex communication system and optical orthogonal frequency division multiplex signal

摘要

PPROBLEM TO BE SOLVED: To provide an optical ad drop multiplexer device in optical orthogonal frequency multiplex division communication. PSOLUTION: The device includes: a branch means to branch a received optical signal into a first optical signal and a second optical signal; a light source means to generate local light; a reception means to subject the second optical signal to coherent reception by the local light, and thereafter output an electric signal by performing photoelectric conversion; a generation means to extract a desired subcarrier signal from the electric signal, and generate an erasure signal inverted in polarity with respect to the extracted subcarrier signal; an addition means to add the erasure signal and a subcarrier signal to be added in an optical orthogonal frequency division multiplex modulation communication device; a modulation means to modulate the local light with the output signal of the addition means; and a multiplexing means to multiplex the first optical signal and an optical signal output by the modulation means. PCOPYRIGHT: (C)2011,JPO&INPIT