概括
本研究引入了一种使用试点符号 (PS) 和振幅调制试点音 (AMPT) 准确监测连贯光学系统中的非线性干扰 (NLI) 的新方法. 该技术有效地估计了NLI信号对噪声比率和光学信号对噪声比率的处罚.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
- 一致的传输系统 一致的传输系统
背景情况:
- 非线性干扰 (NLI) 显著降低了高速连贯光学系统的性能.
- 精确监控NLI对于保持信号质量和网络稳定至关重要.
- 现有的NLI监控方法可能缺乏准确性或与部署的基础设施的兼容性.
研究的目的:
- 为连贯传输系统提出和验证一种新的非线性干扰监测方法.
- 通过共同使用试点符号 (PS) 和振幅调制试点音 (AMPT) 来提高NLI估计的准确性.
- 在模拟和实验WDM系统中评估该方法的性能.
主要方法:
- 开发了一种PS-AMPT联合监测技术,从放大器自发发射 (ASE) 中提取总噪声和分离干扰组件 (自通道干扰 (SCI) 和跨通道干扰 (XCI)).
- 在60GBaud DP-QPSK 1500公里WDM模拟中验证了该方法,估计了NLI的信号噪声比 (SNR) 和光学SNR (OSNR) 处罚.
- 在单通道60GBaud DP-QPSK 500公里系统中进行实验验证.
主要成果:
- 模拟结果显示,NLI SNR和OSNR处罚的估计误差低于0.26/0.07 dB (单通道) 和0.52/0.30 dB (5通道).
- 实验结果表明,NLI SNR和OSNR处罚的估计误差分别低于0.45dB和0.35dB.
- 拟议的方法在短时间窗口内实现了高精度 (模拟时≤160μs,实验时≤300μs).
结论:
- 该PS-AMPT NLI监测方法提供非常准确的估计非线性干扰.
- 该技术与现有的光网络基础设施兼容.
- 这种方法为先进的连贯光学系统的性能监测提供了强大的解决方案.
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