High-spatial-resolution fast Brillouin optical fiber sensor for distributed dynamic measurement based on differential double-pulse

被引：0

作者：

Dong, Yongkang ^{[1
]}

Jiang, Taofei ^{[1
]}

Zhou, Dengwang ^{[1
]}

Ba, Dexin ^{[1
]}

Zhang, Hongying ^{[2
]}

Lu, Zhiwei ^{[1
]}

Li, Hui ^{[3
]}

Chen, Liang ^{[4
]}

Bao, Xiaoyi ^{[4
]}

机构：

[1] Harbin Inst Technol, Inst Optoelect, Harbin 150001, Peoples R China

[2] Harbin Univ Sci & Technol, Dept Opt Informat Sci &Technol, Harbin 150001, Peoples R China

[3] Harbin Inst Technol, Sch Civil Engn, Harbin 150001, Peoples R China

[4] Univ Ottawa, Fiber Opt Lab, Dept Phys, Ottawa, ON K1N 6N5, Canada

来源：

FOURTH ASIA PACIFIC OPTICAL SENSORS CONFERENCE | 2013年 / 8924卷

基金：

中国国家自然科学基金;

关键词：

Distributed measurement; dynamic measurement; Brillouin optical time-domain analysis; GENERATION; LOCKING; BOTDA;

D O I：

10.1117/12.2031472

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

We demonstrate a high-spatial-resolution fast Brillouin optical time-domain analysis scheme based on frequency agility and differential double-pulse for distributed dynamic measurement. The frequency-agility probe wave is obtained from the second-order sideband of the modulated light by using frequency-agility microwave signal from a wideband arbitrary waveform generator. The differential double-pulse technique is proposed to improve the spatial resolution while keeping the capability of dynamic measurement. In experiment, a spatial resolution of 20 cm is achieved by using a 52/50 ns differential double-pulse, and the distributed vibration measurement is demonstrated over a 50-m Panda fiber with a maximum vibration frequency of up to 50 Hz. With only five averages, the standard deviation of the strain accuracy is of 14 mu epsilon.

引用

页数：4

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