Novel PolSK-OCDMA transceiver architecture

This paper proposes a novel incoherent transceiver structure for an optical code-division multiple-access (OCDMA) system that employs polarization shift keying (PolSK). The architecture has been accurately analyzed considering optical amplifier spontaneous emission (ASE) noise, electronic receiver noise, photo-diode shot-noise and mainly multiple-access interference (MAI). The application of optical tapped-delay lines (OTDL) in the receiver as the CDMA-decoder has also been investigated. In terms of spreading code, double-padded modified prime code (DPMPC) has been utilized. The results indicate that the proposed architecture is power efficient and also enhances the system capacity. The constant-envelop optical beam in PolSK modulation makes the system have immunity against the self- and cross-phase modulations. This scheme can be promising for long-haul high-speed transmissions over the OCDMA network.