A fiber-optic refractometer for humidity measurements using an in-fiber Mach-Zehnder interferometer

被引：38

作者：

Liu, Nan ^{[1
]}

Hu, Manli ^{[1
]}

Sun, Hao ^{[1
]}

Gang, Tingting ^{[1
]}

Yang, Zaihang ^{[1
]}

Rong, Qiangzhou ^{[1
]}

Qiao, Xueguang ^{[1
]}

机构：

[1] NW Univ Xian, Dept Phys, Taibai Beilu 229, Xian 710069, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2016年 / 367卷

关键词：

Fiber optics; Fiber optics sensors; Mach-Zehnder interferometer; RELATIVE-HUMIDITY; TEMPERATURE;

D O I：

10.1016/j.optcom.2016.01.002

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An in-fiber Mach-Zehnder interferometer (MZI) was proposed and experimentally demonstrated for refractive index (RI) and relative humidity measurements. The sensor is composed of a hollow-core fiber (HCF) sandwiched between two single-mode fibers (SMFs) with a length of 8 mm. A well-defined interference pattern was obtained as a result of fiber-core mismatch and core-cladding mode interference. The selected interference dip was extremely sensitive to the ambient RI and provided a stable RI response with sensitivities of up to 155.6 nm/RIU and 163.1 dB/RIU for water-based solutions close to the RI of 1.33, which makes it capable of environment humidity measurements with a sensitivity of 1.29 pm%(-1) and 0.00542 dB%(-1). (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1 / 5

页数：5

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