概括
本研究引入了一种新的双极化无载体相检索 (DP-CF-PR) 接收器,用于仅使用强度测量来重建复杂的光学信号. 这种新方法准确地恢复极化多重复合信号,使能耗高的光通信成为可能.
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
- 光纤光学是指光纤的使用.
背景情况:
- 使用无载体相检索 (CF-PR) 恢复极化复杂的QAM信号是具有挑战性的,因为需要从强度测量中准确地估计转移矩阵.
- 基于标准单模光纤 (SSMF) 的系统需要强大的方法来处理交叉极化合.
研究的目的:
- 提出并演示一种双极化CF-PR (DP-CF-PR) 接收器,用于仅使用强度检测重建DP-QAM信号.
- 为了减轻交叉极化合,并使DP-QAM信号的全场恢复成为可能.
主要方法:
- 代场重建与训练序列辅助偏振旋转矩阵估计的整合.
- 仅使用强度检测来重建信号.
- 实验验证使用32GBaud DP-QPSK/16QAM信号超过80公里的SSMF.
主要成果:
- 数字模拟显示,在各种OSNR值和调制格式中,偏振旋转角度和相差估计误差低于0.18rad.
- 实验结果显示了极好的相位重建精度和BER性能.
- 达到了20%的软决策FEC值,DP-QPSK的OSNR为17.4dB,16QAM的OSNR为27.5dB.
结论:
- 拟议的DP-CF-PR架构为双极化光场恢复提供了一种实用且具有成本效益的解决方案.
- 该技术显示出短距离和节能光学互连的巨大潜力.
- 基于直接检测的DP-CF-PR可在光网络中实现强大的信号恢复.
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