概括
在自由空间光通信中的模式平均化可以减轻大气动荡. 这项研究表明,考虑模式依赖性损失对于选择最佳模式对至关重要,从而提高系统性能.
科学领域:
- 光学通信系统 光学通信系统
- 大气流缓解大气流的缓解
- 自由空间光学是自由空间的.
背景情况:
- 大气流会降低自由空间光学 (FSO) 通信的性能,特别是模式分割多重复合 (MDM),导致交叉声响.
- 模式平均化 (模式多样性) 可以通过传输/检测多个模式来抵消流.
- 之前的模式多样性研究集中在模式选择的交叉通话传播上.
研究的目的:
- 调查模式依赖损失对FSO通信模式平均化策略的影响.
- 确定最佳的两种模式组合,以最大限度地提高接收功率和高效地利用模式空间.
- 为了评估轨道角动量 (OAM),拉盖尔-高斯 (LG) 和赫米特-高斯 (HG) 模式的组合.
主要方法:
- 对模式平均化技术的分析,包括模式依赖的损失.
- 识别和评估最佳的两种模式组合 (OAM,LG,HG和混合对).
- 评估模式选择标准超越交叉通话传播.
主要成果:
- 模式依赖性损失对模式平均化策略的有效性产生重大影响.
- 确定了最佳的两种模式组合,以最大限度地提高接收功率并提高模式空间利用率.
- 该研究发现,最佳模式组合不一定是相邻的模式.
结论:
- 纳入模式依赖性损失对于优化FSO通信中的模式多样性至关重要.
- 模式对的战略选择,考虑交叉声和损失,提高了系统对流的弹性.
- 这项研究提供了一种更强大的模式选择方法,以提高FSO通信性能.
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