Abstract
This paper presents five signal formats of return to zero (RZ), non-return to zero (NRZ), chirped return to zero (CRZ), soliton and duobinary in a transmission link. All the signals are compared in terms of its original and conversion to carrier suppressed. Long haul of 3880km is used in original transmitter while 770km used for conversion transmitter. The signal converter utilizes the semiconductor optical amplifier in a loop mirror and the control signal which is typically at ten times higher than the input signals. The carrier suppressed can minimize the peak power alteration in the transmission. It also reduces the nonlinear effects due to unavailability of the peak carrier. NRZ format shows the best performance in this study for 3880km transmission link haul and RZ format shows the best performance in 770km transmission link haul while soliton sits in the last for both two distance transmission haul. Furthermore, in the converted signal or suppressed carrier return to zero (CSRZ), a signal with RZ origin surpasses other formats. Modulation format after conversion suffers higher losses in comparison to without suppression.
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