Performance of multilevel modulation formats in 92 Gb/s systems in the presence of PMD and nonlinear effects

Analytical Review of Advance Optical Modulation Formats

“…Like NRZ, representation of the signal is same in RZ i.e. 1 is represented as a pulse for half period and 0 is represented as no pulse internal intensity modulator is used modulated by a synchronized pulse train (usually a clock intensity modulator [9].RZ sinusoidal waveform. To implement pulses from an modulated on s) or when carving out pulses from an NRZ signal transmitter structure and expensive and required high bandwidth.…”