概括
我们介绍了一种新的方法,使用声飞行员和分数里埃变换 (FrFT) 来跟踪光学信号中极化状态 (SOP) 旋转. 这种技术提高了信号与噪声的比率,并实现了高效的自适应均等.
科学领域:
- 光学通信是指光学通信的应用.
- 信号处理 信号处理
- 光子学 是一个光子学.
背景情况:
- 极化状态 (SOP) 旋转是光纤通信系统的一个重大挑战.
- 准确跟踪SOP旋转对于保持信号完整性和性能至关重要.
- 现有的方法可能会在高旋转速度下扎,或者引入光谱效率低下.
研究的目的:
- 提出和验证一种新的方案,用于跟踪极化状态 (SOP) 旋转,使用奇尔普飞行员和分数里埃变换 (FrFT).
- 为了提高光信号与噪声比率 (OSNR),由于信号叠加而造成的处罚.
- 为了提高系统性能和降低复杂性,实现前自适应均等 (FFD-AEQ).
主要方法:
- 使用通过分数里埃变换 (FrFT) 叠加在双极化数据信号上处理的 chirp 飞行员.
- 采用FrFT与MIMO结构来区分基于它们的分数能量峰值的声飞行员.
- 在匹配的分数域中利用聚合的峰值来估计SOP旋转.
- 实施分数域数字匹配波器 (DMF) 以减轻叠加影响.
- 开发一个进料向前自适应均等化 (FFD-AEQ) 计划,包括预等等.
主要成果:
- 拟议的方案成功地跟踪SOP旋转到5Mrad/s的480Gb/sDP-16QAM和600Gb/sDP-32QAM信号超过25公里光纤.
- 分数域DMF将OSNR处罚从超过4.0dB降至0.9dB.
- 在HD-FEC下,FFD-AEQ有效地处理高达4.1Mrad/s的SOP旋转.
- 与传统的MIMO相比,FFD-AEQ与预等式实现了39.1%的复杂性降低.
结论:
- 拟议的基于 FrFT 的 chirp 试点方法为跟踪高速 SOP 旋转提供了一种高效和频谱效率的方法.
- 分数域DMF通过减少叠加效应显著提高OSNR性能.
- 在SOP旋转的情况下,FFD-AEQ提供了一个强大的,计算效率高的解决方案,用于在SOP旋转的情况下进行自适应等级.
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