Realization of one-coincidence wavelength-time coding using extended-quadratic-congruence and optical-orthogonal codes over waveguide-grating optical code-division multiple-access network codecs

The implementation of an encoder-decoder over two-dimensional (2-D) optical code-division multiple-access (OCDMA) networks is discussed. This coding uses extended-quadratic-congruence code for wavelength hopping, and optical-orthogonal code for time spreading. Due to the cyclic code pattern of this 2-D code family, one novel compact decoder based on arrayed-waveguide gratings can be used to simplify the OCDMA network architecture.

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