Systematic-error suppression in low-coherence Brillouin optical correlation-domain reflectometry

被引：2

作者：

Otsubo, Kenta ^{[1
]}

Zhu, Guangtao ^{[1
]}

Kiyozumi, Takaki ^{[1
]}

Noda, Kohei ^{[1
,2
,3
]}

Nakamura, Kentaro ^{[2
]}

Lee, Heeyoung ^{[4
]}

Mizuno, Yosuke ^{[1
]}

机构：

[1] Yokohama Natl Univ, Fac Engn, Yokohama 2408501, Japan

[2] Tokyo Inst Technol, Inst Innovat Res, Yokohama 2268503, Japan

[3] Univ Tokyo, Grad Sch Engn, Tokyo 1138656, Japan

[4] Shibaura Inst Technol, Coll Engn, Tokyo 1358548, Japan

来源：

SCIENTIFIC REPORTS | 2023年 / 13卷 / 01期

基金：

日本学术振兴会;

关键词：

MEASUREMENT RANGE ENLARGEMENT; PROPOSAL; DELAY;

D O I：

10.1038/s41598-023-44801-4

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Brillouin optical correlation-domain analysis (BOCDA) utilizing low-coherence light sources offers high-resolution distributed strain and temperature sensing. However, conventional BOCDA requires dual-end injection of pump and probe light into the sensing fiber. To overcome this limitation, low-coherence Brillouin optical correlation-domain reflectometry (BOCDR) based on spontaneous Brillouin scattering has emerged, enabling single-end light injection. While a pilot demonstration has shown a spatial resolution of 19 cm, a comparison of its measurement accuracy with standard BOCDR systems is yet to be explored. This study presents a distributed measurement with similar to 3 cm spatial resolution and demonstrates that low-coherence BOCDR eliminates systematic errors caused by direct sinusoidal modulation, offering enhanced measurement precision.

引用

页数：8

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