Brillouin optical time-domain analyzer with frequency shift keying probe

被引：3
|
作者：
Hong, Xiaobin [1 ]
Wang, Sheng [1 ]
Sun, Xizi [1 ]
Wu, Jian [1 ]
Li, Yan [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing, Peoples R China
来源：
OPTICAL ENGINEERING | 2018年 / 57卷 / 06期
基金：
国家重点研发计划;
关键词：
fiber optics sensors; stimulated Brillouin scattering; frequency shift keying; DEPLETION;
D O I：
10.1117/1.OE.57.6.066103
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A Brillouin optical time-domain analysis (BOTDA) technique for enhancing the probe power to +5 dBm is proposed and demonstrated, which is based on a conventional dual sideband probe setup, but the probe waves are modulated by a frequency shift keying signal. The pump distortion is compensated in the time domain with this technique. By employing a 105-km sensing fiber, this technique is experimentally validated with 2-m spatial resolution. Furthermore, another experiment is designed to show the good tolerance for the sensing fibers combined with large Brillouin frequency shift (BFS) difference, as is demonstrated in a 50-km-long sensing fiber consisting of two segments with large BFS difference (200 MHz). (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
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收藏
页数：5
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