动态气溶和动态空气-水接口曲率效应在2Gbit/s的自由空间光学链路上,使用轨道-角度-动量多重复合
Haoqian Song1, Runzhou Zhang1, Nanzhe Hu1
1University of Southern California, Los Angeles 90089, CA, USA.
Nanophotonics (Berlin, Germany)
|December 5, 2024
概括
轨道-角动量 (OAM) 束因动态空气-水接口,包括气溶和表面曲率而经历显著的退化. 这些影响导致模式电源损失和合,影响光通信链路.
科学领域:
- 光学物理学的光学物理.
- 大气光学是大气光学.
- 流体动力学 流体动力学
背景情况:
- 轨道-角动量 (OAM) 束为光通信提供了独特的特性.
- 动态的空气-水接口存在复杂的挑战,由于气溶的存在和表面曲率.
- 这些接口动态可以通过散射,吸收和波面扭曲来降低OAM光束质量.
研究的目的:
- 实验性地研究OAM光束通过动态空气-水接口传播的降解.
- 量化气溶和水面曲率对OAM光束特征的影响.
- 评估多重光通信链路的性能影响.
主要方法:
- 实验设置模拟动态空气-水接口条件.
- 控制引入不同度的气溶 (减弱系数).
- 控制引入变化的表面曲率 (曲率斜率的变化).
- 测量OAM光束的 modal 功率损耗和 modal 功率合.
- 一个2Gbit/s的OAM复杂通信链路的演示.
主要成果:
- 气溶强度增加导致电源合比率从OAM-1增加到OAM+2.4 dB.
- 增加的曲率强度导致电源合比率从OAM-1增加到OAM+2.2的11 dB.
- 与单个效应相比,气溶和曲效应的结合造成了高达2dB的模态功率损失.
- 在OAM-1的接收功率在组合效应下在220ms内波动6dB.
- 在组合动态效应下,对2Gbit/s的OAM多重链路观察到3dB的功率罚款.
结论:
- 动态空水接口显著降低OAM光束质量.
- 气溶和表面曲率都会导致模式功率损失和合.
- 这些退化对基于OAM的光通信系统的性能产生了可衡量的影响.
- 了解这些影响对于强大的自由空间光通信设计至关重要.
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