Highly Sensitive Temperature Sensor Using Intrinsic Mach-Zehnder Interferometer formed by Bent Micro-Fiber Embedded in Polymer

被引:0
作者
Munendhar, Pathi [1 ]
Zhang, Lei [1 ]
Tong, Limin [1 ]
Yu, Shaoliang [1 ]
机构
[1] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
来源
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS) | 2017年 / 10323卷
关键词
Mach-Zehnder interferometer; Tapered; Bent; microfiber; Highly-sensitive; Temperature sensor;
D O I
10.1117/12.2265817
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We reported a simple, robust, and highly sensitive temperature sensor using intrinsic Mach-Zehnder interferometer formed by means of bending a tapered microfiber, embedded in polydimethylsiloxane. The outer temperature perturbations modulate the refractive index of the polymer through thermo-optic and thermal expansion effects of the polymer. This leads to a phase difference between interfering guided modes through the bent-microfiber, which ultimately results prominent wavelength shift in the transmission spectrum. The sensor exhibits a linear temperature response with a sensitivity as high as -6.25nm/degrees C over the temperature range from 24 degrees to 40 degrees C. The sensitivity of the sensor increases as wavelength increases.
引用
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页数:4
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