1.14 b/s/Hz spectrally efficient 50 x 85.4-gb/s transmission over 300, km using copolarized RZ-DQPSK signals

被引：22

作者：

Yoshikane, N

Morita, I

机构：

[1] KDDI R/D Laboratories

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2005年 / 23卷 / 01期

关键词：

copolarized signals; optical prefiltering; return-to-zero differential quaternary phase-shift keying (RZ-DQPSK); spectral efficiency; wavelength-division multiplexing (WDM);

D O I：

10.1109/JLT.2004.840343

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：

1.14 b/s/Hz spectrally efficient 50 x 85.4-Gb/s copolarized return-to-zero differential quaternary phase-shift keying (RZ-DQPSK) signals have been transmitted over 300 kin of nonzero dispersion-shifted fiber (NZ-DSF), using optical prefiltering and conventional C-band erbium-doped fiber amplifier (EDFA) repeaters. In this study, in order to enhance the spectral efficiency, the impact of optical prefiltering on the RZ-DQPSK signal was experimentally investigated in comparison to the DQPSK signal, and we found that the RZ-DQPSK signal had better sensitivity with almost the same nonlinear tolerance than the DQPSK signal even with 65-GHz bandwidth optical prefiltering.

引用

页码：108 / 114

页数：7

共 19 条

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