Multiple access in the presence of optical-beat and go-channel interference using Walsh-code-based synchronized CDMA technique

We experimentally demonstrated the feasibility of using Walsh-code-based synchronized code-division-multiple access (S-CDMA) technique to achieve multiple access in the presence of optical-beat interference (OBI). This multiple access technique can, thus, be applied to WDMA networks using subcarrier-based common wavelength signaling, or PON's which generally do not have wavelength control on uplink laser diodes.