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

页码：7207 / 7220

页数：14

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