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Sensors 2013, 13(5), 6542-6551; doi:10.3390/s130506542
Article

Using a Fiber Loop and Fiber Bragg Grating as a Fiber Optic Sensor to Simultaneously Measure Temperature and Displacement

1
,
2
,
3
 and
3,*
1 Department of Information Technology, Kao Yuan University, Kaohsiung City 821, Taiwan 2 Department of Electrical Engineering, National Formosa University, Yunlin 632, Taiwan 3 Department of Electro-Optical Engineering, National Formosa University, Yunlin 632, Taiwan
* Author to whom correspondence should be addressed.
Received: 8 April 2013 / Revised: 18 April 2013 / Accepted: 8 May 2013 / Published: 16 May 2013
(This article belongs to the Special Issue Optomechatronics)
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Abstract

This study integrated a fiber loop manufactured by using commercial fiber (SMF-28, Corning) and a fiber Bragg grating (FBG) to form a fiber optic sensor that could simultaneously measure displacement and temperature. The fiber loop was placed in a thermoelectric cooling module with FBG affixed to the module, and, consequently, the center wavelength displacement of FBG was limited by only the effects of temperature change. Displacement and temperature were determined by measuring changes in the transmission of optical power and shifts in Bragg wavelength. This study provides a simple and economical method to measure displacement and temperature simultaneously.
Keywords: fiber Bragg grating; fiber loop; temperature; displacement fiber Bragg grating; fiber loop; temperature; displacement
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.

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Chang, Y.-T.; Yen, C.-T.; Wu, Y.-S.; Cheng, H.-C. Using a Fiber Loop and Fiber Bragg Grating as a Fiber Optic Sensor to Simultaneously Measure Temperature and Displacement. Sensors 2013, 13, 6542-6551.

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