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Regular | Open Access

Simultaneous Force and Temperature Measurement Using Optical Microfiber Asymmetrical Interferometer

Caibin YU1, Xiaoxiao CHEN2, Yuan GONG1( ), Yu WU1, Yunjiang RAO1, Gangding PENG3
Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
National Institute of Measurement and Testing Technology, Chengdu, 610021, China
School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW 2052, Australia
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Abstract

A novel optical microfiber asymmetric Fabry-Perot interferometric (MAFPI) sensor is developed for simultaneous measurement of force and temperature. The MAFPI structure is formed by a weak fiber Bragg grating (FBG), a section of the microfiber, and a cleaved fiber end surface. The narrowband beam reflected from the low-reflectivity FBG and the broadband beam from the Fresnel reflection interfere lead to its unique sensing performance. The force sensing is performed by detecting the bending-loss induced fringe contrast changes, while the Bragg wavelength shift is employed for temperature measurement. Sensitivities of 9.8pm/℃ and 0.025dB/μN were obtained experimentally for temperature and force measurements, respectively.

Keywords

Optical microfiberweak FBGinterferometric

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Photonic Sensors
Volume 4 Issue 3,
September 2014
Pages 242-247
DOI: 10.1007/s13320-014-0201-4

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Cite this article:
YU C, CHEN X, GONG Y, et al. Simultaneous Force and Temperature Measurement Using Optical Microfiber Asymmetrical Interferometer. Photonic Sensors, 2014, 4(3): 242-247. https://doi.org/10.1007/s13320-014-0201-4

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Received: 21 April 2014
Revised: 11 June 2014
Published: 08 July 2014
© The Author(s) 2014.

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