Peformance of RZ- versus NRZ-transmission on standard single-mode fibers

Design of Symmetric dispersion compensated, long haul, Single and Multichannel Optical Lightwave Systems in Telecommunications: Theory, Background and Simulation Model-A Study

“…It should be remembered that Modified Duo binary format was the worst performed format comparatively at near 4Gbps.So, it is needed a complete analysis on high dispersion tolerance of every formats. Here, although NRZ is the last performed format but on taking practical orientation it has a very good Quality factor of near 100 at high powers 34,35,37 .…”

“…Thus RZ suffers high Quality due to the Intersymbol interference. 36,37 Normally it is widely believed that inter-channel impairment is only the consequence of Dispersion, but new factors which are of much importance such as Intra-Four Way Mixing (IFWM) and Intra-Cross Phase Modulation (IXPM). These two terms may be considered as the borrowed concepts from Inter-channel Crosstalk (refer fig.10).…”

“…Because, as the pulse width of NRZ is large compared to RZ it has more interaction times with the other pulses in the fiber 36,37 . The pulses in time domain interact efficiently with the pulses of other wavelength in due to more interaction times for NRZ.…”

Optimization of apodized linearly chirped fiber gratings for optical communications

“…The effectiveness of the various apodization profiles was further examined by using the resulted apodized, linearly chirped gratings as dispersion compensators in high-bitrate standard fiber telecommunication links. The comparison was carried out by calculating the maximum dispersioncompensated transmission distance achieved and the resulting eye-opening penalty [25]. In all the transmission simulations, 10 Gbit/s nonreturn to zero (NRZ) data streams consisting of bits were considered.…”

Comparative analysis and power optimization for return to zero and non return to zero coded transmission in 40 Gbps fiber optics system

“…A current analysis about optical communication represents that for 40 Gbps single mode transmission, the RZ transmission is much better as compared to NRZ transmission [6]. When we deal with high data rate optical communication systems using SMF, the RZ transmission is suited well than NRZ because RZ has more compressed pulse version as compared to NRZ [7,8]. The Erbium doped fiber amplifiers (EDFA) are very help full for the amplification of optical signals at various lengths of SMF.…”