Transmission Performance of Spectrum-Sliced Incoherent 2-D FFH-OCDMA Systems Using Modified Prime-hop Codes

Two-dimensional optical CDMA has been proved to be a promising access technique providing many distinctive merits. A system using fiber Bragg gratings to spectrally slice the incoherent light from a low cost light source is proposed. The optical beat noise in such an incoherent system is studied as the dominant noise source. The sliced wavelengths are thereafter encoded according a predetermined pattern. A modified prime hop code (MPHC) scheme is employed to lower the power loss and reduce the BER degradation caused by the beat noise. Comparison between MPHC and prime hop codes (PHCs) regarding the beat noise indicates that MPHC is very suitable for the proposed incoherent system