%0 Journal Article
%T 217 km long distance photon-counting optical time-domain reflectometry based on ultra-low noise up-conversion single photon detector
%A Guo-Liang Shentu
%A Qi-Chao Sun
%A Xiao Jiang
%A Xiao-Dong Wang
%A Jason S. Pelc
%A M. M. Fejer
%A Qiang Zhang
%A Jian-Wei Pan
%J Physics
%D 2013
%I arXiv
%R 10.1364/OE.21.024674
%X We demonstrate a photon-counting optical time-domain reflectometry with 42.19 dB dynamic range using an ultra-low noise up-conversion single photon detector. By employing the long wave pump technique and a volume Bragg grating, we reduce the noise of our up-conversion single photon detector, and achieve a noise equivalent power of -139.7 dBm/sqrt(Hz). We perform the OTDR experiments using a fiber of length 216.95 km, and show that our system can identify defects along the entire fiber length with a distance resolution better than 10 cm in a measurement time of 13 minutes.
%U http://arxiv.org/abs/1308.0512v2