Abstract:
Cross phase modulation (XPM) is the most serious effect that limits the
allowable input power and system capacity by generating intensity
modulated power causing more noise at the receiver in long-haul multichannel
light-wave DWDM transmission system. In this thesis line coding
schemes are applied to combat the effect of XPM in a DWDM optical
system. Multilevel line coding schemes like duobinary and Novel optical line
codes are analyzed in. detail to get an insight to their effect in data
transmission. The XPM effect is also analyzed to quantify its effect in terms
of realizable parameters. Performance criteria are expressed in terms of bit
error rate (BER) and eye-opening penalty (EOP). Performances of line
coding are evaluated for different parameters like different fiber lengths,
channel spacing and input powers. Analytical and simulated results show
1.89 dB improvements in terms of input power.
