Improved localization algorithm for distributed fiber-optic sensor based on merged Michelson-Sagnac interferometer

被引：28
|
作者：
Song, Qiuheng [1 ]
Zhou, Pengwei [1 ]
Peng, Hekuo [1 ]
Hu, Yuhan [1 ]
Xiao, Qian [1 ]
Wu, Hongyan [1 ]
Jia, Bo [1 ]
机构：
[1] Fudan Univ, Fiber Opt Res Ctr, Dept Mat Sci, Shanghai 200433, Peoples R China
来源：
OPTICS EXPRESS | 2020年 / 28卷 / 05期
关键词：
MACH-ZEHNDER; LOCATION;
D O I：
10.1364/OE.384728
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel distributed fiber-optic localization algorithm with high sensitivity and precision based on merged Michelson-Sagnac interferometer is proposed and demonstrated. By performing simple addition and subtraction processing on the two phase differences of the two interferometers, two superimposed signals with a fixed delay can be obtained. The time delay can be calculated by a cross-correlation algorithm. Combined with the polynomial fitting interpolation, the disturbance location resolution is significantly improved. The total sensing distance can reach 120 km, and the localization errors are within +/- 35 m and +/- 160 m in the contact and non-contact disturbance experiment, respectively. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：7207 / 7220
页数：14
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