Nonlinear interaction between broadband single-photon-level coherent states
Nonlinear interaction between broadband single-photon-level coherent states
复制标题
宽带单光子级相干态之间的非线性相互作用
DOI:
10.1364/prj.5.000324
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发表时间:
2017-08
影响因子:
7.6
通讯作者:
Chen Xianfeng
中科院分区:
文献类型:
--
作者:
Li Yuanhua;Xiang Tong;Nie Yiyou;Sang Minghuang;Chen Xianfeng
We experimentally demonstrate the nonlinear interaction between two chirped broadband single-photon-level coherent states. Each chirped coherent state is generated in independent fiber Bragg gratings. They are simultaneously coupled into a high-efficiency nonlinear waveguide, where they are converted into a narrowband single-photon state with a new frequency by the process of sum-frequency generation (SFG). A higher SFG efficiency of 1.06×10−7 is realized, and this efficiency may achieve heralding entanglement at a distance. This also made it possible to realize long-distance quantum communication, such as device-independent quantum key distribution, by directly using broadband single photons without filtering.
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