低复杂性的光纤非线性补偿方案融合了单通道数字反向传播与双相结合双波,用于DSCM-WDM系统
Optics express
|April 12, 2025
概括
一个新的低复杂度非线性补偿方案,SC-DBP-DPCTW,有效地解决了数字子载波多重复合-波长分割多重复合系统中的信号扭曲. 与现有技术相比,这种方法可以实现显著的Q因子改进,并降低计算复杂度.
科学领域:
- 光学通信是指光学通信.
- 非线性光学是非线性光学.
- 数字信号处理 数字信号处理
背景情况:
- 结合数字子载波复杂化 (DSCM) 和波长分割复杂化 (WDM) 的连贯系统面临信号扭曲,如自我子载波非线性 (SSN),交叉子载波非线性 (CSN) 和交叉相调制 (XPM).
- 现有的非线性补偿方案通常需要来自相邻道的信息,从而导致高计算复杂性.
研究的目的:
- 为DSCM-WDM系统提出一种新的,低复杂度的非线性补偿方案.
- 为了有效地补偿SSN,CSN和XPM没有道间信息.
主要方法:
- 引入单通道单阶段数字反向传播 (SC-DBP) 与双相结合双波 (双PCTW) 方案相结合,称为SC-DBP-DPCTW.
- 模拟一个9×128GBaud双极化16QAM传输在1600公里.
- 在806.4公里的3 × 28-GBaud传输上进行实验验证.
主要成果:
- 在模拟中,SC-DBP-DPCTW实现了与10步DSCM-DBP相比的Q因子改进,复杂性降低了92.2%.
- 实验结果显示,SC-DBP-DPCTW与5步DSCM-DBP的性能相匹配,复杂度降低了84.3%.
结论:
- 拟议的SC-DBP-DPCTW方案为DSCM-WDM系统中的非线性补偿提供了一个高效和低复杂性的解决方案.
- 这种方法显著减少了计算开销,同时保持了高信号质量,使其适用于先进的光通信系统.
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