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25 April 2024

» arxiv » 1504.1222

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Photon-counting Brillouin optical time-domain reflectometry based on up-conversion detector and fiber Fabry-Perot scanning interferometer
Haiyun Xia ; Mingjia Shangguan ; Guoliang Shentu ; Chong Wang ; Jiawei Qiu ; Xiuxiu Xia ; Chao Chen ; Mingyang Zheng ; Xiuping Xie ; Qiang Zhang ; Xiankang Dou ; Jianwei Pan ;
Date:	6 Apr 2015
Abstract:	A direct-detection Brillouin optical time-domain reflectometry (BOTDR) is proposed and demonstrated by using an up-conversion single-photon detector and a fiber Fabry-Perot scanning interferometer (FFP-SI). Taking advantage of high signal-to-noise ratio of the detector and high spectrum resolution of the FFP-SI, the Brillouin spectrum along a polarization maintaining fiber (PMF) is recorded on a multiscaler with a small data size directly. In contrast with conventional BOTDR adopting coherent detection, photon-counting BOTDR is simpler in structure and easier in data processing. In the demonstration experiment, characteristic parameters of the Brillouin spectrum including its power, spectral width and frequency center are analyzed simultaneously along a 10 km PMF at different temperature and stain conditions.
Source:	arXiv, 1504.1222
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