A Refractive Index Sensor Based on the Tapering Theory

作者：Fu, Salai^*; Dai, Huanhuan^*; Shi, Qingguo^*; Peng, Baojin^*

来源：IEEE Sensors Journal, 2016, 16(4): 954-957.

DOI：10.1109/JSEN.2015.2482538

• Interferometers
• optical sensors
• optical fibers

A refractive index (RI) sensor has been realized to measure RI, hardly affected by temperature. A fused biconical taper machine is used to receive two same diameter tapers, which are cascaded by a fusion splicer. This paper studies the spectral characteristics of the RI sensor with a different bending angle in tapers, and finds that with the increase of bending angle (from 0 degrees to 100 degrees), the extinction ratio will be improved while the spectrum moved down. When two tapers are bent to 90 degrees, the RI sensor can serve as a sensing probe (the RI sensitivity was similar to 126.15 nm/RIU). The RI sensor has significant applications, and the measurement error is <1%.

• 出版日期2016-2
• 单位浙江师范大学; 浙江大学