Performance evaluation of optical code division multiple access (CDMA) using polarization shift keying direct dectection (PolSK-DD) to improve bipolar capacity

The present paper describes the advantages of the combination of optical Code Division Multiple Access and Polarization Shift Keying direct detection. It is shown by means of a new receiver model that the normally disturbing statistical fluctuations of the State of Polarization on a single-mode fiber result in an attenuation of the crosscorrelation functions at the receiver. Thereby an average process gain of 4.7 dB in signal-to-crosstalk ratio is obtained. A receiver with optical signal processing unit for the chip-synchronous case is derived. Finally some simulation results concerning multi user interference and receiver noise are presented.