论文标题
基于量子通信网络的光纤SAGNAC干涉仪，独立于极化的单光子开关
Polarization-independent single-photon switch based on a fiber-optical Sagnac interferometer for quantum communication networks
论文作者
论文摘要
未来量子网络的重要组成部分是能够动态路由单光子的光学开关。在这里，我们基于光纤的SAGNAC干涉仪设计实现了这样的开关。该路由是用放置在sagnac环内部的一对快速电流电信相调节器实现的，使得每个调制器都作用于单个光子的正交极化成分，以产生独立的偏振能力，对于多种应用而言至关重要。我们在开关的两个输出之间获得了超过19 dB的平均消光比。我们的实验仅由商业现成的组件构建，从而可以直接与当前的光学通信系统兼容。
An essential component of future quantum networks is an optical switch capable of dynamically routing single-photons. Here we implement such a switch, based on a fiber-optical Sagnac interferometer design. The routing is implemented with a pair of fast electro-optical telecom phase modulators placed inside the Sagnac loop, such that each modulator acts on an orthogonal polarization component of the single-photons, in order to yield polarization-independent capability that is crucial for several applications. We obtain an average extinction ratio of more than 19 dB between both outputs of the switch. Our experiment is built exclusively with commercial off-the-shelf components, thus allowing direct compatibility with current optical communication systems.
