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引导声波Brillouin散射噪声在几个模式的光纤
Optics express
|September 23, 2025
概括
分析了几模式光纤 (FMF) 中的引导声波布里卢恩散射 (GAWBS) 噪声. 在FMF中,GAWBS噪声高于标准单模光纤,影响数字连贯传输.
科学领域:
- 光纤通讯是指光纤通讯的一种方式.
- 光子学是指光子学的使用方法.
- 声波物理学的声波物理
背景情况:
- 引导声波布里卢恩散射 (GAWBS) 是光纤中的噪声源.
- 少数模式光纤 (FMF) 提供更大的带宽,但可能表现出独特的噪声特征.
- 了解GAWBS噪声对于推进高容量光传输系统至关重要.
研究的目的:
- 从理论和实验上研究GAWBS在少数模式纤维 (FMF) 中的噪声产生和特征.
- 量化GAWBS噪声对FMF数字连贯传输性能的影响.
主要方法:
- 在FMF中通过模式合生成GAWBS噪声的理论分析.
- 计算各种模式合的GAWBS噪声功率光谱.
- 使用自我延迟异质基因检测对GAWBS噪声光谱进行实验测量.
- 使用高斯噪声 (GN) 模型对数字连贯传输的GAWBS噪声影响的评估.
主要成果:
- GAWBS噪声是通过FMF中不同线性偏振 (LP) 模式之间的模式合生成的,受光纤沿线传播的声学模式的影响.
- 测量的GAWBS噪声光谱与理论计算有很好的一致性.
- 在FMF中,GAWBS噪声比标准单模光纤 (SSMF) 高3-4dB,这是由于所有LP模式的同时模式合.
- 在FMF的数字连贯传输中,GAWBS噪声会导致传输距离处罚为27.7%30.0%.
结论:
- 在FMF中,GAWBS噪声是数字连贯传输的重要限制因素.
- 理论框架和实验验证提供了对FMF的GAWBS噪声的全面了解.
- 对GAWBS噪声的缓解策略是必要的,以充分利用FMF在未来光网络中的潜力.
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