Compensation of noise floor distortion in long-range simplified optical correlation-domain reflectometry without the use of electrical spectrum analyzer

被引：1

作者：

Zhu, Guangtao ^{[1
]}

Miyamae, Tomoya ^{[1
]}

Takahashi, Hiroshi ^{[1
]}

Noda, Kohei ^{[1
,2
]}

Lee, Heeyoung ^{[3
]}

Nakamura, Kentaro ^{[2
]}

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

来源：

APPLIED PHYSICS EXPRESS | 2023年 / 16卷 / 01期

基金：

日本学术振兴会;

关键词：

correlation-domain sensing; optical fiber sensors; distributed reflectivity measurement; noise floor; system simplification; COHERENCE FUNCTION; WAVELENGTH;

D O I：

10.35848/1882-0786/aca4ba

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In simplified optical correlation-domain reflectometry (OCDR) without the use of an electrical spectrum analyzer (ESA), the noise floor of the reflectivity distribution is distorted in long-range measurement, which sometimes causes significant errors in the distributed reflectivity measurement. Herein, we experimentally analyze the distorted noise floor by high-speed ESA-free OCDR and clarify the origin of the noise floor. Then we show that this noise floor can be compensated by appropriate filtering. Consequently, distributed reflectivity measurement over a 1.1 km long sensing fiber is properly performed at a repetition rate of 100 Hz.

引用

页数：4

共 11 条

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