波分复用光网络中4波混频影响的实验研究

Experimental study of four-wave miring influence in WDM optical networks

摘要: 为了抑制光纤中4波混频(FWM)效应引起的信道间非线性串扰,采用了实验的方法,对高非线性光纤中FWM效应的影响进行了研究,测量了产生FWM的效率与信道间隔以及信号强度的关系,比较了等信道间隔和非等信道间隔情况下FWM效应的影响。结果表明,FWM的效率随着信道间隔的增加而减小,随信号光功率的增加而线性增加。等信道间隔情况下,FWM效应对中间信道的影响最大,与非等信道间隔相比,FWM效应引入了1.5dB的功率代价。这些结果对有效抑制光纤中的FWM串扰是有帮助的。

Abstract: The impact of four-wave mixing(FWM) crosstalk on wavelength division multiplexing systems in high nonlinear fiber was studied experimentally.Results showed that the generated wave efficiency decreased with increasing channel spacing and input signal power.The influence of FWM on signal was compared when the channels were arranged equal and unequal.It was shown that 1.5dB larger penalty was introduced in the case of equal channel spacing than in the case of unequal channel spacing.