Comparison between NRZ and RZ OOK modulation format in chromatic dispersion compensation in both electrical and optical compensator

This paper compares the efficiency of on-off Keying (OOK) modulation formats non-return-to-zero (NRZ) and return-to-zero (RZ) in both electrical and optical chromatic dispersion compensation. While In electrical compensator feed forward-decision feedback equalizer (FFE-DFE) method was applied, Dispersion Compensation Fiber (DCF) was chosen to evaluate the effect of modulation format on them. Transmission distance, subsequently are varied in both systems with mentioned compensation systems to evaluate the Bit Error Rate (BER) regarding to mentioned modulation techniques.