Patent ID: 7424226

Claim:
An optical code division multiplexing communication method comprising the steps of: producing a multi-wavelength optical pulse train from wavelength multiplexing pulse; transmitting the multi-wavelength optical pulse train through a transmission line using a time-spreading/wavelength-hopping method; decoding wavelength multiplexing pulse from the multi-wavelength optical pulse train transmitted through the transmission line; compensating delay time differences between individual optical pulses of the multi-wavelength optical pulse train, the delay time differences occurring in the step of transmitting the multi-wavelength optical pulse train through the transmission line; and compensating optical pulse spread in a time direction, which occurs in each of the optical pulses of the multi-wavelength optical pulse train in the step of transmitting the multi-wavelength optical pulse train through the transmission line; wherein the step of producing the multi-wavelength optical pulse train is performed by an encoder including a plurality of Bragg gratings connected in series, the plurality of Bragg gratings of the encoder having specific reflecting wavelengths, respectively; wherein the step of decoding wavelength multiplexing pulse is performed by a decoder including a plurality of Bragg gratings connected in series, the plurality of Bragg gratings of the decoder having specific reflecting wavelengths, respectively; and wherein the step of compensating delay time differences is performed by a delay time difference compensator having a structure in which the plurality of Bragg gratings of the decoder are arranged at intervals determined on the basis of the delay time differences between individual optical pulses of the multi-wavelength optical pulse train.