手机知网|搜索

Nonlinear interaction between broadband single-photon-level coherent states

YUANHUA LI;TONG XIANG;YIYOU NIE;MINGHUANG SANG;XIANFENG CHEN

  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 singlephoton state with a new frequency by the process of sum-frequency generation(SFG). A higher SFG efficiency of1.06 × 10-7is 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.……   
[关键词]:coherent;broadband;entanglement;waveguide;Bragg;filtering;photon;realized;converted;bandwidth
[文献类型]:期刊
[文献出处]:《Photonics Research2017年04期
[格式]:PDF原版; EPUB自适应版(需下载客户端)