Distributed vibration sensing with time-resolved optical frequency-domain reflectometry

被引：130

作者：

Zhou, Da-Peng ^{[1
]}

Qin, Zengguang ^{[1
]}

Li, Wenhai ^{[1
]}

Chen, Liang ^{[1
]}

Bao, Xiaoyi ^{[1
]}

机构：

[1] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

INTRUSION-SENSOR SYSTEM; FIBER; INTERFEROMETER; OTDR;

D O I：

10.1364/OE.20.013138

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The distributed vibration or dynamic strain information can be obtained using time-resolved optical frequency-domain reflectometry. Time-domain information is resolved by measuring Rayleigh backscatter spectrum in different wavelength ranges which fall in successive time sequence due to the linear wavelength sweep of the tunable laser source with a constant sweeping rate. The local Rayleigh backscatter spectrum shift of the vibrated state with respect to that of the non-vibrated state in time sequence can be used to determine dynamic strain information at a specific position along the fiber length. Standard single-mode fibers can be used as sensing head, while the measurable frequency range of 0-32 Hz with the spatial resolution of 10 cm can be achieved up to the total length of 17 m. (C) 2012 Optical Society of America

引用

页码：13138 / 13145

页数：8

共 15 条

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