Multi-parameter optical fiber sensor based on enhanced multimode interference

被引：33

作者：

Luo, Yiyang ^{[1
]}

Xia, Li ^{[1
]}

Yu, Can ^{[1
]}

Li, Wei ^{[1
]}

Sun, Qizhen ^{[1
]}

Wang, Yuanwu ^{[1
]}

Liu, Deming ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Natl Engn Lab Next Generat Internet Access Syst, Wuhan 430074, Hubei, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2015年 / 344卷

关键词：

Fiber optics sensors; Fiber structure; Multi-parameter sensing; MACH-ZEHNDER INTERFEROMETER; LIQUID-LEVEL MEASUREMENT; REFRACTIVE-INDEX; HIGH-SENSITIVITY; TEMPERATURE; GRATINGS;

D O I：

10.1016/j.optcom.2015.01.025

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, a multi-parameter optical fiber sensor based on all-fiber in-line single-mode-multimode-no-core-single-mode (SMNS) structure is proposed and experimentally demonstrated. A section of multimode fiber (MMF) is utilized as the mode coupler to enhance the multimode interference (MMI). A 58.5 mm long no-core fiber (NCF) acts as the sensing head, which is modified by the surrounding medium. The experimental results exhibit that the sensor possesses a water level sensitivity of 215.98 pm/mm by monitoring the wavelength shift at 1586.03 nm, and -0.11 dB/mm of the power attenuation at the wavelength of 1600.05 nm with a measurement range of 58.33 mm. At the same time, the RI sensitivities of 131.71 nm/RIU and the axial strain sensitivity of -1.21 pm/mu epsilon are also obtained. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：120 / 124

页数：5

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