Czegledi Cristian B, Karlsson Magnus, Agrell Erik, Johannisson Pontus
Chalmers University of Technology, Department of Signals and Systems, SE-41296 Gothenburg, Sweden.
Chalmers University of Technology, Department of Microtechnology and Nanoscience, SE-41296 Gothenburg, Sweden.
Sci Rep. 2016 Feb 24;6:21217. doi: 10.1038/srep21217.
A theoretical framework is introduced to model the dynamical changes of the state of polarization during transmission in coherent fibre-optic systems. The model generalizes the one-dimensional phase noise random walk to higher dimensions, accounting for random polarization drifts, emulating a random walk on the Poincaré sphere, which has been successfully verified using experimental data. The model is described in the Jones, Stokes and real four-dimensional formalisms, and the mapping between them is derived. Such a model will be increasingly important in simulating and optimizing future systems, where polarization-multiplexed transmission and sophisticated digital signal processing will be natural parts. The proposed polarization drift model is the first of its kind as prior work either models polarization drift as a deterministic process or focuses on polarization-mode dispersion in systems where the state of polarization does not affect the receiver performance. We expect the model to be useful in a wide-range of photonics applications where stochastic polarization fluctuation is an issue.
引入了一个理论框架来模拟相干光纤系统中传输过程中偏振态的动态变化。该模型将一维相位噪声随机游走推广到更高维度，考虑了随机偏振漂移，模拟了庞加莱球面上的随机游走，这已通过实验数据得到成功验证。该模型用琼斯、斯托克斯和实四维形式描述，并推导了它们之间的映射关系。这样的模型在模拟和优化未来系统中将变得越来越重要，在未来系统中，偏振复用传输和复杂的数字信号处理将是自然组成部分。所提出的偏振漂移模型是同类中的首个模型，因为之前的工作要么将偏振漂移建模为确定性过程，要么关注偏振态不影响接收器性能的系统中的偏振模色散。我们期望该模型在随机偏振波动成为问题的广泛光子学应用中有用。
