Alternative modulation formats in Nx40 Gb/s WDM standard fiber RZ-transmission systems

被引：57
|
作者：
Hodzic, A [1 ]
Konrad, B [1 ]
Petermann, K [1 ]
机构：
[1] Tech Univ Berlin, Fachgebiet Hochfrequenztechn, D-10587 Berlin, Germany
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2002年 / 20卷 / 04期
关键词：
communication system nonlinearities; optical fiber communication; optical modulation; optical pulse generation; wavelength division multiplexing (WDM);
D O I：
10.1109/50.996579
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A comparison of carrier-suppressed return-to-zero (CSRZ) and single sideband return-to-zero (SSB-RZ) formats is made in an attempt to find the optimum modulation format for high bit rate optical transmission systems. Our results show that CSRZ is superior to return-to-zero (RZ) and SSB-RZ with respect to signal degradation due to Kerr nonlinearities and chromatic dispersion in wavelength division multiplexing (WDM) as well as in single-channel 40-Gb/s systems over standard single-mode fibers (SSMF). It is shown that CSRZ enables a maximum spectral efficiency of approximately 0.7 (b/s)/Hz in a N x 40 Gb/s WDM system with equally polarized channels. Furthermore, the CSRZ format in N x 40 Gb/s WDM systems shows no further signal degradation compared to single-channel transmission.
引用
收藏
页码：598 / 607
页数：10
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