Nonlinear crosstalk and compensation in QDPASK optical communication systems

被引：15
作者：
Hansryd, J [1 ]
van Howe, J [1 ]
Xu, C [1 ]
机构：
[1] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14850 USA
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2004年 / 16卷 / 08期
关键词：
fiber-optic communication; multilevel modulation formats; nonlinear compensation; phase modulation;
D O I：
10.1109/LPT.2004.831282
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：
Nonlinear crosstalk in the quaternary differential-phase amplitude-shift-keying (QDPASK) modulation format is analyzed. Significant crosstalk penalty is measured on a QDPASK signal with a 20-Gb/s aggregate capacity for nonlinear phase shifts of 0.177pi rad and above. Two different compensation techniques are demonstrated based on either prechirping or postchirping of the optical signal, increasing the nonlinear tolerance by 6.1 and 4.5 dB, respectively.
引用
收藏
页码：1975 / 1977
页数：3
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