Wavelength-time spreading optical CDMA system using wavelength multiplexers and mirrored fiber delay lines

We propose a two-dimensional (2-D) code family and transmitter/receiver structures for incoherent multi-wavelength-time spread optical CDMA networks. The combination of metal-coated reflection delay lines and arrayed waveguide gratings (AWG) gives the proposed optical coder/decoder much enhanced flexibility in accommodating different code sets. Successful encoding/decoding has been demonstrated on signals up to 3-GHz time-chip rate with 4/spl times/15 code words.