Community Forums - Reply To: NRZ VS RZ

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Free Evaluation

May 5, 2016 at 10:16 pm #38924

Spectator

Hi Dhiman
I agree with Rajguru that Practically, it has been demonstrated numerically and experimentally that the conventional nonreturn-to-zero (NRZ) modulation format is superior compared to the return-to-zero (RZ) modulation when dealing with large WDM systems, as RZ modulation causes a significant Eye Closure Penalty near end channels. The results obtained in this tutorial will be used to compare the Eye Closure Penalties for both NRZ and RZ cases, as well as the effects of nonlinearities. The advantage of RZ format in terms of transmission distances was recently demonstrated in a long-distance wavelength division multiplexing (WDM) transmission experiment though most WDM transmission experiments conducted so far have used NRZ formats .
WDM signals, which were initially NRZ but modified before transmission, were successfully transmitted over transoceanic distances in a recirculating loop. Time-division multiplexing (TDM) transmission experiments, of course, use RZ signal formats, which allow optical MUX-DEMUX to be easily carried out.
Hope you find it helpful.
Regards

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