Performance analysis of optical CDMA in transmission systems

Abstract

Performance of an optical code division multiple access (OCDMA) system are evaluated to determine the impact of multi access interference for a given number of users. Analog clock include the effect of fiber non linearity such as cross phase modulation and the cross talk due to XPM. The expression for the signal MAI and cross talk are derived for a single mode fiber transmission link operating at gigabit per second. Performance results are evaluated 1 Gbps & 10 Gbps with different codes like M-system, gold sequence and pn-sequence to compare their relative performance. The optimum system design parameters are determined at a specific BER (bit error rate).