A new multi wavelength — Optical Code Division Multiple Access code design based on Balanced Incomplete Block Design

A new three-dimensional (Space/ Wavelength/ Time) Multi Wavelength Optical Code Division Multiple Access (MW-OCDMA) code design based on Balanced Incomplete Block Designs (BIBD) is proposed for fiber optic communication. The proposed code has a weight of W = s × w × k, where s is the number of fibers (space) used per user, w is the number of wavelengths used per user and k is the number of ones in a block of BIBD. This code ensures a maximum cross-correlation of ‘1’ between any two users. The cardinality of the code family is higher by a factor of approximately ‘3’ when compared with BIBD codes of one-dimensional OCDMA with equivalent weight, length and cross-correlation.