Simultaneous measurement of strain and temperature with a pair of matched fiber Bragg gratings

Kondiparthi, Mahesh and Shivananju, BN (2010) Simultaneous measurement of strain and temperature with a pair of matched fiber Bragg gratings. In: Conference on Remote Sensing System Engineering III, AUG 02, 2010, San Diego, CA,.

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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 1.2n epsilon / root Hz and 0.0011 degrees C respectively. Proposed sensor shows a great potential in high sensitive strain measurements with a simplified experimental setup.

Item Type:	Conference Paper
Series.:	Proceedings of SPIE-The International Society for Optical Engineering
Publisher:	The International Society for Optical Engineering
Additional Information:	Copyright of this article belongs to The International Society for Optical Engineering.
Keywords:	fiber Bragg grating; simultaneous measurement; diode laser; mid reflection frequency
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics Division of Physical & Mathematical Sciences > Physics
Date Deposited:	01 Mar 2011 12:00
Last Modified:	07 Apr 2011 07:04
URI:	http://eprints.iisc.ac.in/id/eprint/35834

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