Thinned fiber based Mach-Zehnder interferometer for measurements of liquid level and refractive index

被引：2
作者：
Li, Lecheng [1 ]
Xia, Li [1 ]
Xie, Zhenhai [1 ]
Liu, Deming [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Natl Engn Lab Next Generat Internet Access Syst, Coll Optoelect Sci & Engn, Wuhan 430074, Peoples R China
来源：
22ND INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS, PTS 1-3 | 2012年 / 8421卷
关键词：
Thinned fiber; Mach-Zehnder interferometer; refractive index measurement;
D O I：
10.1117/12.963736
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
A novel singlemode-multimode-thinned-singlemode (SMTS) fiber structure based Mach-Zehnder interferometer (MZI) is proposed for measurements of liquid level and refractive index (RI). We observe that the liquid RI information can be provided from the sensitivity of the interference peak shifts. Furthermore, by measuring the certain wavelength shift, the liquid level can be measured accordingly. A 9.00 mm-long thinned fiber with core/cladding diameters of around 4.5/80 mu m is used. The wavelength of 1538.7228 nm exhibits a water level sensitivity of -175.8 pm/mm, and refractive index sensitivity of -1868.42 (pm/mm) / RIU, respectively. Moreover, the fabrication process is very simple and cost effective.
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页数：4
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