双极化b调制非线性频率分割多重复合光学传输系统的通道模型
Optics express
|June 29, 2023
概括
本研究介绍了一种用于双极化非线性频率分割复杂化 (DP-NFDM) 光学系统的分析模型. 它衍生出非线性里埃域中的噪声表达式,这对于推进高容量光通信至关重要.
科学领域:
- 光学通信工程 光学通信工程
- 非线性光学是非线性光学.
- 信号处理 信号处理
背景情况:
- 非线性频率分割复杂化 (NFDM) 使用非线性里埃变换 (NFT) 进行先进的光信号处理和数据调制.
- 双极化 (DP) NFDM系统,特别是采用b调制的系统,提供高效率,但需要精确建模噪声特征.
- 现有的分析方法基于亚底波扰动理论需要扩展,以处理DP-NFDM系统的复杂性.
研究的目的:
- 将连续非线性里埃光谱 (b-系数) 的附加波动扰动理论扩展到双极化 (DP) NFDM案例.
- 在任意b调制的DP-NFDM光学系统中推导一个描述输入-输出信号关系的非对称通道模型.
- 在非线性里埃域内获得输入依赖噪声功率光谱密度的分析表达式.
主要方法:
- 扩展附加波动扰动理论到双极化非线性里埃变换 (NFT) 框架.
- 领先顺序连续输入输出信号关系的导出,形成一个非对称的通道模型.
- 对有效的条件高斯输入依赖噪声组件的功率光谱密度的分析计算.
主要成果:
- 为DP-NFDM系统开发非线性里埃域中噪声功率光谱密度的相对简单的分析表达式.
- 证明衍生分析表达式与数值模拟结果之间的显著一致性.
- 识别和描述由NFT操作中的数值不准确引起的"处理噪声".
结论:
- 该研究提供了DP-NFDM光通信系统中噪声的验证分析模型,这对于系统设计和性能预测至关重要.
- 衍生的表达式有助于更深入地了解使用b调制的先进光学传输系统中的噪声机制.
- 这些发现支持使用NFDM技术实现高容量光学网络的实际实施和优化.
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