OPTICAL CDMA INVERSE SPREAD DEMODULATOR

摘要

PROBLEM TO BE SOLVED: To obtain an optical CDMA inverse spread demodulator, capable of reducing unnecessary side lobe components of a decoded optical pulse and reducing the output level of non-decoded optical pulse. SOLUTION: Frequency components are timewisely changed according to the optical intensity of decoded signal light by connecting a means 13 to chirp signal light frequency and an optical filter 14 with the trailing stage of an inverse spread demodulator 12 which performs inverse spread demodulation of an optical CDMA signal spread and demodulated by a spread demodulator which performs spread demodulation of a signal in an optical area, and only frequency components corresponding to the main peak pulse of the demodulated signal light are extracted.