On the Combination of Optical CDMA and POLSK

The present paper describes the advantages of the combination of optical Code Division Multiple Access (CDMA) and Polarization Shift Keying (POLSK). By means of a derived new receiver model it is shown that the normally disturbing statistical fluctuations of the State of Polarization (SOP) on a single-mode optical fiber result in an attenuation of the crosscorrelation functions (CCF) at the receiver. Thereby an average process gain of 4.7 dB of the signal-to-crosstalk power ratio is obtained. That means, three times more active users compared to the use of bipolar binary sequences (for example Gold Codes) are possible.