Electro-optic modulator feedback control in phase-sensitive optical time-domain reflectometer distributed sensor

被引：14
作者：
Hui, Xiaonan
Zheng, Shilie [1 ]
Zhou, Jinhai
Xu, Chen
Chi, Hao
Jin, Xiaofeng
Zhang, Xianmin
机构：
[1] Zhejiang Univ, Dept Informat Sci & Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China
来源：
APPLIED OPTICS | 2013年 / 52卷 / 35期
关键词：
SPATIAL-RESOLUTION; RECENT PROGRESS; FIBER; SYSTEM; OTDR;
D O I：
10.1364/AO.52.008581
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a novel method to control the electro-optic modulator (EOM) applied in the phase-sensitive optical time-domain reflectometer (phi-OTDR) distributed sensor system, which uses the data of the OTDR curves rather than applying an independent control module. We explain the relationship between the accumulation value of the OTDR curve and the EOM's extinction ratio, and utilize this relationship to feedback control the EOM. The experimental results show that it can compensate the drift of the EOM, and make the modulator run with a high extinction ratio for a long time. And this method can also ratify a small jump of the EOM's bias point. (C) 2013 Optical Society of America
引用
收藏
页码：8581 / 8585
页数：5
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