The optical communication system, the optical transmitter, the optical receiver and method and the optical correlator which is used with these

摘要

As for the complex orthogonal mark in this inventing, the element in the mth line n line exp (2 j (m 1) (n 1) /N) (as for j imaginary unit) is the complex orthogonal mark which designates each line of square matrix in the N line N line which is as codeword. Optical mark division multiplex communication/optical code division multiple access (OCDM/OCDMA) the business optical orthogonal mark declination of the above-mentioned code element (phase) with N which corresponds is actualized with the line of optical pulse. The optical transmitter or the optical receiver includes the optical correlator which has the sampling Bragg grating which possesses the plural Bragg grating which inside the optical waveguide are arranged in series at fixed interval, each of them of the above-mentioned codewords is allotted to this optical correlator. In the optical transmitter, the light information which it should transmit is encoded being the above-mentioned optical correlator. In the optical receiver, the reception light information is decoded, being the above-mentioned optical correlator, can obtain high autocorrelation output only when agree with the codeword which encodes the reception light information and the codeword which is allotted to the particular optical receiver.