Reducing BER of spectral-amplitude coding optical code-division multiple-access systems by single photodiode detection technique

Abstract

In this paper, we present a single photodiode detection (SPD) technique for spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems. The proposed technique eliminates both phase-induced intensity noise (PIIN) and multiple-access interference (MAI) in the optical domain. Analytical results show that for 35 simultaneous users transmitting at data rate of 622 Mbps, the bit-error rate (BER) = 1.4×10-28 for SPD technique is much better compared to 9.3×10-6 and 9.6×10-3 for the modified-ANDa as well as the ANDa detection techniques, respectively. Moreover, we verified the improved performance afforded by the proposed technique using data transmission simulations.