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Open AccessArticle

Fiber Taper-Based Mach–Zehnder Interferometer for Ethanol Concentration Measurement

by Changrui Liao 1,2, Feng Zhu 1,2,*, Peng Zhou 1,2 and Ying Wang 1,2
1
Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(11), 741; https://doi.org/10.3390/mi10110741
Received: 11 September 2019 / Revised: 24 October 2019 / Accepted: 24 October 2019 / Published: 31 October 2019
(This article belongs to the Special Issue IMCO 2019)
We present a new type of fiber Mach–Zehnder interferometer based on a fiber taper and a pair of inner air bubbles for highly sensitive ethanol concentration measurement. The experimental results show there is a nonlinear relationship between the wavelength shift of the dip located near 1485 nm and the ethanol concentration but in the concentration range from 0.3 to 0.7 it can be seen as a linear response with a sensitivity of 28 nm/vol. View Full-Text
Keywords: optical fiber sensor; Mach-Zehnder interferometer; ethanol concentration measurement; femtosecond laser micromachining optical fiber sensor; Mach-Zehnder interferometer; ethanol concentration measurement; femtosecond laser micromachining
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MDPI and ACS Style

Liao, C.; Zhu, F.; Zhou, P.; Wang, Y. Fiber Taper-Based Mach–Zehnder Interferometer for Ethanol Concentration Measurement. Micromachines 2019, 10, 741.

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