Achievement of Long Reach High Speed WDM-to-OTDM Conversion Based on XPM (Cross Phase Modulation)

Abstract

Wavelength division multiplexing is solution for high speed data over communication channels and utilizes bandwidth of optical fiber. Based on 2 km HNLF (Highly Non-Linear Fiber), a simple and strong demultiplexer employing SPM (Self Phase Modulation) introduced SC (Super continuum) generation and optical filtering has been effectively used in the demultiplexing of 80-Gb/s data to 20 Gb/s. The Q (Quality) factor value decreases as the transmission distance increases. At 0 dBm input power the Q factor value is 5.766772 with BER (Bit Error Rate) 3.95065×10^-9 that have maximum achievable distance of 98 km. As the transmission distance increases the effect of the noise on the system become more critical is demonstrated in eye diagrams. In the range of line width 0 MHz to 100 MHz the 10 MHz gives the best performance in term of BER and Q factor value. Also results at 80 Gbps over 100Km are realized after using symmetrical dispersion compensation and cascaded EAM (Ectro absorption modulation) detection.