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Proceedings Paper

Simultaneous measurement of strain and temperature with a pair of matched fiber Bragg gratings
Author(s): Mahesh Kondiparthi; Shivananju B.N
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Paper Abstract

A novel approach for simultaneous measurement of static/dynamic strain and temperature with a pair of matched fiber Bragg grating(FBG)s is proposed. When a diode laser locked to the mid reflection frequency of reference FBG is used to illuminate the sensor FBG, reflected intensity changes with strain on sensor FBG. Reference FBG responds with temperature on sensor FBG and is immune to strain, hence, wavelength of the diode laser acts as a signature for temperature measurement. Theoretical sensitivity limit for static strain and temperature are 1.2 nε √Hz and 0.0011 °C respectively. Proposed sensor shows a great potential in high sensitive strain measurements with a simplified experimental setup.

Paper Details

Date Published: 26 August 2010
PDF: 6 pages
Proc. SPIE 7813, Remote Sensing System Engineering III, 78130Q (26 August 2010); doi: 10.1117/12.871964
Show Author Affiliations
Mahesh Kondiparthi, Indian Institute of Science (India)
Shivananju B.N, Indian Institute of Science (India)


Published in SPIE Proceedings Vol. 7813:
Remote Sensing System Engineering III
Philip E. Ardanuy; Jeffery J. Puschell, Editor(s)

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