Phase-stable source of polarization-entangled photons using a polarization Sagnac interferometer
Phase-stable source of polarization-entangled photons using a polarization Sagnac interferometer
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DOI：
10.1103/physreva.73.012316
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发表时间：
2006-01-01
影响因子：
2.9
通讯作者：
Wong, FNC
中科院分区：
文献类型：
--
作者：
Kim, T;Fiorentino, M;Wong, FNC
我们展示了一个简单的，强大的，和超亮的偏振纠缠光子的偏振Sagnac干涉仪的基础上的参数下转换源。双向泵浦类型II相位匹配周期极化KTiOPO 4产生的测量通量的5000偏振纠缠对/s/mW的泵浦功率在1 nm的带宽在96.8%的量子干涉可见度。Sagnac干涉仪的共光路布置消除了对双光子输出状态的相位稳定的需要。
We demonstrate a simple, robust, and ultrabright parametric down-conversion source of polarization-entangled photons based on a polarization Sagnac interferometer. Bidirectional pumping in type-II phase-matched periodically poled KTiOPO4 yields a measured flux of 5000 polarization-entangled pairs/s/mW of pump power in a 1-nm bandwidth at 96.8% quantum-interference visibility. The common-path arrangement of the Sagnac interferometer eliminates the need for phase stabilization for the biphoton output state.