Impact of Electrical Band-Limitation on Transmission Performance of CSRZ and CSRZ-DPSK Modulation Formats for High Spectral Efficiency DWDM Systems

Dong-Soo LEE
Yang Jing WEN
Je Soo KO
Man Seop LEE
Ampalavanapillai NIRMALATHAS

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B    No.5    pp.1977-1985
Publication Date: 2005/05/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.5.1977
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Section on Recent Progress in Optoelectronics and Communications)
Category: Transmission Systems and Technologies
Keyword: 
electrical band-limitation,  modulation formats,  40 Gbit/s,  CSRZ,  CSRZ-DPSK,  

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Summary: 
We investigate the impact of electrical band-limitation on the transmission performance of both carrier suppressed return-to-zero (CSRZ) and CSRZ differential phase shift keying (CSRZ-DPSK) format for high spectral efficiency DWDM systems. Results show that electrical band-limitation improves signal spectral compactness, leading to reduced linear crosstalk and improved tolerance against chromatic dispersion in optical fiber link without causing any degradation to fiber nonlinearity tolerance. In addition, it is shown that the electrical band-limitation is more efficient to CSRZ-DPSK signal than CSRZ signal in reducing signal degradation caused by linear crosstalk and fiber chromatic dispersion.