论文标题
带有主动反射器的基于量子相关的自由空间光学链接
Quantum-correlation-based free-space optical link with an active reflector
论文作者
论文摘要
我们使用收发器站125 m的室外活动反射器在250 m上呈现基于量子相关的自由空间光学（FSO）链路。自由空间光学通信的性能可以通过大气湍流效应（例如横梁徘徊和信号波动）显着降低。我们使用660 nm跟踪激光来通过分析快速光束徘徊和缓慢的颞梁漂移来减少大气效应，并使用此信息纠正810 nm信号光子的量子通道对齐。在这项工作中，主动反射器由镜子，6轴六轴阶段和远程无线桥组成。使用接收器单元和活动反射器之间的无线光学反馈对室外温度变化引起的梁路径的缓慢漂移进行了转移和控制。我们的工作提供了有用的知识，可改善对室外条件下的光束路径的控制，可以开发这些知识，以确保在现实世界中的高质量量子信息转移，例如用于城市量子通信的无人FSO链接或重新反射量子通信链接。
We present a quantum-correlation-based free-space optical(FSO) link over 250 m using an outdoor active reflector 125 m from the transceiver station. The performance of free-space optical communication can be significantly degraded by atmospheric turbulence effects, such as beam wander and signal fluctuations. We used a 660 nm tracking laser to reduce atmospheric effects, by analyzing the fast beam wander and slow temporal beam drift, using this information to correct the quantum channel alignment of the 810 nm signal photons. In this work, the active reflector consisted of a mirror, a 6-axis hexapod stage, and a long-range wireless bridge. The slow drift of the beam path due to outdoor temperature changes was steered and controlled using wireless optical feedback between the receiver units and the active reflector. Our work provides useful knowledge for improved control of beam paths in outdoor conditions, which can be developed to ensure high quality quantum information transfer in real-world scenarios, such as an unmanned FSO link for urban quantum communication or retro-reflective quantum communication links.
