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http://dx.doi.org/10.6109/jkiice.2008.12.2.328

NRZ versus RZ Modulation Format in Lumped Dispersion Managed Systems  

Lee, Seong-Real (목포해양대학교 해양전자통신공학부)
Cho, Sung-Eon (순천대학교 정보통신공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.12, no.2, 2008 , pp. 328-335 More about this Journal
Abstract
The system performance of NRZ format in WDM transmission system with lumped dispersion management(DM) and optical phase conjugator(OPC) is compared with that of RZ format. It is confirmed that eye opening penalty(EOP) of both NRZ and RZ format in WDM transmission system having lumped DM combined with OPC are greatly improved than those in WDM system with only OPC. The optimal net residual dispersion(NRD) in the case of RZ format is decided to so small value that path-averaged dispersion coefficient become almost zero, while that in the case of NRZ format is decided to larger value, for the best improvement of overall WDM channels. It is also confirmed that EOP in the case of RZ format is more improved than that in the case of NRZ format in lumped DM with optimal NRD. This is resulted from that lumped DM combined with OPC suppress the signal distortion due to intrachannel four-wave mixing(IFWM) and intrachannel cross phase modulation(IXPM). Consequently, lumped DM combined with OPC proposed in this paper is effective technique to mitigate intrachannel nonlinearities in WDM transmitting RZ format.
Keywords
NRZ/RZ modulation format; lumped dispersion management; IFWM; IXPM; ghost pulse; net residual dispersion; wavelength division multiplexing;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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