20 December 2013 High-sensitivity fiber refractive index sensor formed by sandwiching a thinned taper between two abrupt tapers
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Proceedings Volume 9044, 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 90440D (2013) https://doi.org/10.1117/12.2038918
Event: International Conference on Optical Instruments and Technology (OIT2013), 2013, Beijing, China
Abstract
A fiber refractive index (RI) sensor based on a Mach–Zehnder interferometer (MZI) formed by sandwiching a thinned taper between two abrupt tapers. The abrupt tapers and the thinned taper are easily fabricated by a commercial fiber fusion splicer and a homemade tapering machine, respectively. The sensor has been experimentally demonstrated for RI sensing by monitoring its spectral shifts. The experimental results show that the sensor with a thinner taper has higher sensitivity due to the strong evanescent field interaction. A sensitivity of 3808.4 nm/RIU (refractive index unit) is obtained, which is about 100 times higher than that of the conventional taper-based MZI sensors.
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Jinping Chen, Jun Zhou, Lei Shu, Yanan Ma, Haopeng Zhang, "High-sensitivity fiber refractive index sensor formed by sandwiching a thinned taper between two abrupt tapers", Proc. SPIE 9044, 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 90440D (20 December 2013); doi: 10.1117/12.2038918; https://doi.org/10.1117/12.2038918
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