Performance improvement of DPSK signal transmission by a phase-preserving amplitude limiter.
Performance improvement of DPSK signal transmission by a phase-preserving amplitude limiter.
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DOI：
10.1364/oe.15.008094
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发表时间：
2007-06
期刊：
影响因子：
3.8
通讯作者：
M. Matsumoto;Kenichi Sanuki
中科院分区：
文献类型：
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作者：
M. Matsumoto;Kenichi Sanuki
理论和实验表明，利用非线性光纤中四波混频饱和的全光限幅器实现保相幅度再生，可以提高DPSK的传输性能。该限幅器抑制了信号的幅度波动，从而降低了传输光纤自相位调制引起的非线性相位噪声。10Gbit/S短脉冲DPSK传输实验表明，在发射机后或循环传输环路内加入限幅器均可提高系统性能。推导了线性和非线性相位噪声的理论表达式，并用它分析了限幅器的缺陷对相位噪声的影响。
It is theoretically and experimentally shown that phase-preserving amplitude regeneration by an all-optical amplitude limiter using saturation of four-wave mixing in a nonlinear fiber can enhance DPSK transmission performance. The limiter suppresses amplitude fluctuations of the signal, by which the nonlinear phase noise caused by self-phase modulation of the transmission fiber is reduced. A 10-Gbit/s short-pulse DPSK transmission experiment shows that the limiter inserted either after a transmitter or inside a recirculating transmission loop can enhance the performance. Theoretical expressions for the linear and nonlinear phase noise are derived, with which the influence of imperfections of the limiter is examined.