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

被引：35
|
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
收藏
页码：1 / 5
页数：5
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