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Sensors 2017, 17(6), 1192;

A High-Sensitive Pressure Sensor Using a Single-Mode Fiber Embedded Microbubble with Thin Film Characteristics

2,3,* , 2,3
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
Engineering Technology Research Center of Shanxi Province for Opto-Electronic Information and Instrument, Taiyuan 030051, China
These two authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Elfed Lewis
Received: 15 December 2016 / Revised: 4 May 2017 / Accepted: 16 May 2017 / Published: 23 May 2017
(This article belongs to the Special Issue Recent Advances in Fiber Bragg Grating Sensing)
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A new fiber pressure sensor is proposed and analyzed in this paper. A commercial arc fusion splicer and pressure-assisted arc discharge technology are used here to fabricate a silica hollow microbubble from a common glass tube with the characteristics of a thin film. Then the single mode fiber is embedded into the microbubble to form a fiber Fabry–Perot interferometer by measuring the reflected interference spectrum from the fiber tip and microbubble end. As the wall thickness of the micro-bubble can reach up to several micrometers, it can then be used for measuring the outer pressure with high sensitivity. The fabrication method has the merits of being simple, low in cost, and is easy to control. Experimental results show that its pressure sensitivity can reach 164.56 pm/kPa and the temperature sensitivity can reach 4 pm/°C. Therefore, it also has the advantage of being insensitive to temperature fluctuation. View Full-Text
Keywords: pressure sensing; Fabry–Perot interference; microbubble; thin film layer pressure sensing; Fabry–Perot interference; microbubble; thin film layer

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Wang, G.; Liu, X.; Gui, Z.; An, Y.; Gu, J.; Zhang, M.; Yan, L.; Wang, G.; Wang, Z. A High-Sensitive Pressure Sensor Using a Single-Mode Fiber Embedded Microbubble with Thin Film Characteristics. Sensors 2017, 17, 1192.

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