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Article Information

Guo-Liang Shentu, Qi-Chao Sun, Xiao Jiang, Xiao-Dong Wang, Jason S. Pelc, M. M. Fejer, Qiang Zhang, and Jian-Wei Pan, "217 km long distance photon-counting optical time-domain reflectometry based on ultra-low noise up-conversion single photon detector," Opt. Express 21, 24674-24679 (2013)

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