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A Highly Sensitive Temperature Sensor Based on a Liquid-Sealed S-Tapered Fiber

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9 Author(s)
Rui Yang ; State Key Lab. on Integrated Optoelectron., Jilin Univ., Changchun, China ; Yong-Sen Yu ; Yang Xue ; Chao Chen
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A highly sensitive temperature sensor based on the liquid-sealed S fiber taper (SFT) in a capillary is proposed and experimentally demonstrated. The temperature independent SFT is turned into a sensitive temperature sensor by the thermo-optic effect of the RI liquid and the thermal expansion of the sealant. The total length of the device is 10 mm, which can be further shortened to 1 mm if necessary. The temperature sensing mechanism of the liquid-sealed SFT is analyzed in detail and experimental results show the sensitivity reaches as high as -1.403 nm/°C. The temperature sensitivity contributions from different mechanisms are also obtained experimentally.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 9 )