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首页> 外文期刊>Journal of Lightwave Technology >Intercore Crosstalk in Homogeneous Multicore Fibers: Theoretical Characterization of Stochastic Time Evolution
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Intercore Crosstalk in Homogeneous Multicore Fibers: Theoretical Characterization of Stochastic Time Evolution

机译：均质多芯光纤中的芯间串扰：随机时间演化的理论表征

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摘要

A time-varying phase shift associated with each phase matching point of homogeneous weakly coupled multicore fibers is proposed to describe the stochastic time evolution of the intercore crosstalk (ICXT) observed experimentally. This model for the stochastic ICXT time evolution represents a generalization of current ICXT theoretical models and potentiates the development of new time-adaptive ICXT mitigation techniques. The model is first proposed considering a single polarization scheme, and is then generalized to a dual polarization scheme and to account for the polarization coupling between cores. Comparison between spectrograms of the crosstalk transfer function (XTTF) amplitude evaluated using the single polarization model and measured experimentally shows excellent agreement for short (few minutes) decorrelation times. For large decorrelation times (above 1 h), some differences in the behavior of the time evolution of the XTTF amplitude are observed. Nevertheless, excellent match between the mean and variance of the XTTF amplitude evaluated from the model and from analytical expressions proposed in the literature is observed for short and large decorrelation times. It is also shown that the decorrelation time of the short-term average crosstalk remains unchanged when the dual polarization scheme is considered. Similar spectrograms of the XTTF obtained with the single and dual polarization ICXT models are also shown.
机译：提出了与均匀弱耦合多芯光纤的每个相位匹配点相关的时变相移，以描述实验观察到的芯间串扰（ICXT）的随机时间演化。这种用于随机ICXT时间演化的模型代表了当前ICXT理论模型的概括，并促进了新的时间自适应ICXT缓解技术的发展。首先考虑单极化方案提出该模型，然后将其推广到双极化方案并考虑核之间的极化耦合。使用单极化模型评估并通过实验测得的串扰传递函数（XTTF）振幅的频谱图之间的比较显示了短（几分钟）去相关时间的极佳一致性。对于较大的去相关时间（1小时以上），观察到XTTF幅度的时间演化行为存在一些差异。然而，对于较短和较大的去相关时间，可以观察到从模型和文献中提出的分析表达式评估的XTTF振幅的均值和方差之间的极佳匹配。还表明，当考虑双极化方案时，短期平均串扰的去相关时间保持不变。还显示了使用单极化和双极化ICXT模型获得的XTTF的相似谱图。

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