Performance analysis of receiver power sensitivity of advanced modulation formats in WDM based standard mode fibre for next generation data rate

This paper presents a comparative analysis of power sensitivity of the receiver under different modulation formats in Standard Mode Fibre (SMF). Four modulation techniques were used namely “Return to Zero” (RZ), “Non Return to Zero” (NRZ), Duobinary and Differential Quadrature Phase Shift Keying (DQPSK). The simulation was carried both with and without Wavelength Division Multiplexing (WDM) and comparison was made accordingly. Result indicated DQPSK to be the smartest among all followed by Duobinary. NZR showed moderate performance in general. RZ showed the worst performance in WDM system.