具有模式多样性和连贯组合的光学相位阵列接收器
1State Key Laboratory of Information Photonics and Optical Communications & School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Nanophotonics (Berlin, Germany)
|April 11, 2025
概括
这项研究通过使用模式多样性来增强光学相位阵列 (OPA) 接收器,以显著扩大视野 (FOV) 以用于LiDAR和自由空间光通信中的应用.
科学领域:
- 光子学和光学工程的工程.
- 固态光束转向技术的技术.
- 先进的光学通信系统.
背景情况:
- 光学相位阵列 (OPA) 对于在LiDAR和自由空间光学 (FSO) 通信中低成本的固态光束定向至关重要.
- 视野 (FOV) 是传输 (Tx) 和接收 (Rx) OPA 的关键性能指标.
- 当前的Rx OPA设计往往假定与Tx OPA互惠,未能考虑到接收器遇到的复杂事件波条件.
研究的目的:
- 证明模式多样性可以扩大FOV并提高Rx OPAs的接收效率.
- 引入一种有效的方法,利用收集的光子在LiDAR和FSO系统中进行连贯检测.
- 为了克服传统的OPA接收器设计的局限性,这些OPA接收器设计与不同幅度的光束作斗争.
主要方法:
- 在Rx OPA中杆模式的多样性,不论天线类型.
- 引入一个反向设计的模式分割器-转换器和一个连贯的组合架构.
- 设计和制造一个以TE0和TE1模式运行的8通道边缘发射OPA接收器,采用稀疏阵列来抑制格子叶片.
主要成果:
- 为多模式OPA接收器实现了133°的FOV.
- 与同一个阵列的单模OPA接收器相比,表现出更高的性能,该接收器具有49°的FOV.
- 通过使用拟议的连贯组合架构,成功处理了具有不同幅度的光束.
结论:
- 模式多样性为Rx OPA性能提供了显著的优势,扩大了FOV超出单模式功能.
- 拟议的方法,整合模式多样性和连贯组合,引入更高阶的空间模式作为OPA接收器的新设计参数.
- 这一进步有可能显著改善用于LiDAR和FSO应用的OPA接收器的设计和功能.
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