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Temperature Sensing Based on Ethanol-Filled Photonic Crystal Fiber Modal Interferometer

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8 Author(s)
Qian, Wenwen ; Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China ; Chun-liu Zhao ; Chi Chiu Chan ; Limin Hu
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A modal interferometer made of a short ethanol-filled photonic crystal fiber (PCF) combined with a fully collapsed splicing with single-mode fibers (SMFs) is proposed for temperature measurement. Two fully collapsed splicing regions between the ethanol-filled PCF and SMFs excite and recombine two interfering modes in the ethanol-filled PCF. The interference spectrum of the ethanol-filled PCF is more sensitive to temperature than that of original PCF. By monitoring one peak wavelength shift of the ethanol-filled PCF modal interference spectrum, the temperature sensitivity reaches up to -0.35 nm/°C for a 3.25-cm long ethanol-filled PCF.

Published in:

Sensors Journal, IEEE  (Volume:12 ,  Issue: 8 )