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— Optical orthogonal codes(OOC) are used as spreading sequences for optical CDMA networks. An OOC is a family of constant weight binary codes with a pre-specified maximum correlation parameter(MCP). Johnson in his 1962 paper introduced three bounds for constant weight codes, that we call bounds A, B, and Hybrid. Subsequently Chung et al. adapted Johnson(More)
—New families of three-dimensional (3-D) optical orthogonal codes for applications to optical code-division multiple access (OCDMA) networks are proposed. The families are based in the three dimensional periodic Welch Costas array over elementary Abelian groups. These new families are shown to be asymptotically optimal through the Johnson bound.