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Proceedings Paper

Embeddable fiber optic strain sensor for structural monitoring
Author(s): Amardeep Kaur; Sriram Nagarajan; Sudharshan Anandan; Lei Yuan; K. Chandrashekhara; Steve E. Watkins; Hai Xiao; Nam Phan
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Paper Abstract

An extrinsic Fabry-Perot interferometric (EFPI) fiber optic sensor is presented for measurement of strain at high ambient temperatures. The sensor is fabricated using a femto-second (fs) laser. The EFPI sensor is fabricated by micromachining a cavity on the tip of a standard single-mode fiber and is then self-enclosed by fusion splicing another piece of singlemode fiber. The fs-laser based fabrication makes the sensor thermally stable to sustain temperatures as high as 800 °C. The sensor is relatively insensitive towards the temperature as compared to its response towards the applied strain. The sensor can be embedded in Carbon fiber/Bismaleimide (BMI) composite laminates for strain monitoring at high ambient temperatures.

Paper Details

Date Published: 19 April 2013
PDF: 8 pages
Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86921W (19 April 2013); doi: 10.1117/12.2009462
Show Author Affiliations
Amardeep Kaur, Missouri Univ. of Science and Technology (United States)
Sriram Nagarajan, Missouri Univ. of Science and Technology (United States)
Sudharshan Anandan, Missouri Univ. of Science and Technology (United States)
Lei Yuan, Missouri Univ. of Science and Technology (United States)
K. Chandrashekhara, Missouri Univ. of Science and Technology (United States)
Steve E. Watkins, Missouri Univ. of Science and Technology (United States)
Hai Xiao, Missouri Univ. of Science and Technology (United States)
Nam Phan, Naval Air Systems Command (United States)


Published in SPIE Proceedings Vol. 8692:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013
Jerome Peter Lynch; Chung-Bang Yun; Kon-Well Wang, Editor(s)

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