Multimode microfiber interferometer for dual-parameters sensing assisted by Fresnel reflection

被引：49
作者：
Sun, Qizhen [1 ,2 ]
Luo, Haipeng [1 ]
Luo, Hongbo [1 ]
Lai, Macheng [1 ]
Liu, Deming [1 ]
Zhang, Lin [2 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Natl Engn Lab Next Generat Internet Access Syst, Wuhan 430074, Peoples R China
[2] Aston Univ, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England
来源：
OPTICS EXPRESS | 2015年 / 23卷 / 10期
基金：
中国国家自然科学基金;
关键词：
REFRACTIVE-INDEX SENSOR; MACH-ZEHNDER INTERFEROMETER; PHOTONIC CRYSTAL FIBER; OPTICAL MICROFIBER; PRESSURE SENSOR; TEMPERATURE; SILICA; PROBE;
D O I：
10.1364/OE.23.012777
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A compact and low cost fiber sensor based on single multimode microfiber with Fresnel reflection is proposed and demonstrated for simultaneous measurement of refractive index and temperature. The sensor is fabricated with two simple steps including fiber tapering and then fiber endface cleaving. The reflection spectrum is an intensity modulated interference spectrum, as the tapered fiber generates interference pattern and the cleaved endface provides intensity modulation. By demodulating the fringe power and free spectrum range (FSR) of the spectrum, RI sensitivities of -72.247dB/RIU and 68.122nm/RIU, as well as temperature sensitivities of 0.0283dB/degrees C and -17pm/degrees C are obtained. Further, the sensing scheme could also provide the feasibility to construct a more compact sensing probe for dual-paramters measurement, which has great potential in bio/chemical detection. (C) 2015 Optical Society of America
引用
收藏
页码：12777 / 12783
页数：7
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