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 str uctures for incoherent multi-wavelength-time spread optical CDMA networks. The combination of metal-coated reflection delay lines and arrayed waveguid e gratings (AWG) gives the proposed optical coder/decoder much enhanced fle xibility in accommodating different code sets. Successful encoding/decoding has been demonstrated on signals up to 3-GHz time-chip rate with 4 X 15 co de words.