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Sensors 2017, 17(3), 555; doi:10.3390/s17030555

A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

1
School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
2
Engineering Technology Research Center of Shanxi Province for Opto-electric Information and Instrument, Taiyuan 030051, China
3
School of Instrument and Electronics, North University of China, Taiyuan 030051, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Christophe Caucheteur and Tuan Guo
Received: 27 December 2016 / Revised: 22 February 2017 / Accepted: 6 March 2017 / Published: 9 March 2017
(This article belongs to the Special Issue Recent Advances in Fiber Bragg Grating Sensing)
View Full-Text   |   Download PDF [1708 KB, uploaded 13 March 2017]   |  

Abstract

A high-sensitivity, low-cost, ultrathin, hollow fiber micro bubble structure was proposed; such a bubble can be used to develop a high-sensitivity strain sensor based on a Fabry–Perot interferometer (FPI). The micro bubble is fabricated at the fiber tip by splicing a glass tube to a single mode fiber (SMF) and then the glass tube is filled with gas in order to expand and form a micro bubble. The sensitivity of the strain sensor with a cavity length of about 155 μm and a bubble wall thickness of about 6 μm was measured to be up to 8.14 pm/μϵ. View Full-Text
Keywords: optical fiber sensor; Fabry–Perot; strain measurement optical fiber sensor; Fabry–Perot; strain measurement
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yan, L.; Gui, Z.; Wang, G.; An, Y.; Gu, J.; Zhang, M.; Liu, X.; Wang, Z.; Wang, G.; Jia, P. A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics. Sensors 2017, 17, 555.

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