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Sensors 2014, 14(10), 18575-18582; doi:10.3390/s141018575

Sensitivity-Improved Strain Sensor over a Large Range of Temperatures Using an Etched and Regenerated Fiber Bragg Grating

1
School of Physics, Northwest University, Xi'an, Shaanxi 710069, China
2
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
*
Authors to whom correspondence should be addressed.
Received: 11 July 2014 / Revised: 25 August 2014 / Accepted: 22 September 2014 / Published: 8 October 2014
(This article belongs to the Section Physical Sensors)
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Abstract

A sensitivity-improved fiber-optic strain sensor using an etched and regenerated fiber Bragg grating (ER-FBG) suitable for a large range of temperature measurements has been proposed and experimentally demonstrated. The process of chemical etching (from 125 µm to 60 µm) provides regenerated gratings (at a temperature of 680 °C) with a stronger reflective intensity (from 43.7% to 69.8%), together with an improved and linear strain sensitivity (from 0.9 pm/με to 4.5 pm/με) over a large temperature range (from room temperature to 800 °C), making it a useful strain sensor for high temperature environments. View Full-Text
Keywords: etched and regenerated fiber gratings; strain sensor; high temperature etched and regenerated fiber gratings; strain sensor; high temperature
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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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MDPI and ACS Style

Wang, Y.; Qiao, X.; Yang, H.; Su, D.; Li, L.; Guo, T. Sensitivity-Improved Strain Sensor over a Large Range of Temperatures Using an Etched and Regenerated Fiber Bragg Grating. Sensors 2014, 14, 18575-18582.

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