A liquid refractive index sensor based on 3-core fiber Michelson interferometer

被引：24

作者：

Shao, Min ^{[1
]}

Han, Liang ^{[1
]}

Sun, Haonan ^{[1
]}

Yin, Xunli ^{[1
]}

Qiao, Xueguang ^{[2
]}

机构：

[1] Xian Shiyou Univ, Key Lab Photoelect Oil Gas Logging & Detecting, Minist Educ, Sch Sci, Xian 710072, Shaanxi, Peoples R China

[2] Northwest Univ, Dept Phys, Xian 710069, Shaanxi, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2019年 / 453卷

基金：

中国国家自然科学基金;

关键词：

3-core fiber; Fiber optical sensors; Michelson interferometer; Liquid refractive index; MACH-ZEHNDER INTERFEROMETER; CORE FIBER; OPTICAL-FIBER; TEMPERATURE; SENSITIVITY;

D O I：

10.1016/j.optcom.2019.124356

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A liquid refractive index (RI) sensor based on in-fiber Michelson interferometer (MI) is proposed and experimentally demonstrated, which consists of a segment of 3-core fiber (3CF) fusion spliced with a short piece of multimode fiber (MMF). The operation principle of the MI lies in the intermodal interference of the 3CF via employing MMF to excite high-order modes, and the 3CF end face reflects the interference spectrum which loaded the surrounding RI information. By measuring the reflection spectrum variation, the RI can be determined. Experimentally, a linearly RI sensitivity of -151.56 dB/RIU is achieved in the sensing range of 1.3335-1.3720 RIU, and the temperature sensitivity in water is 0.048 nm/degrees C.

引用

页数：5

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