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A Method to Discriminate Strain and Temperature in Fiber Bragg Grating Sensors

Chalapati, Madhan T and Pattnaik, PK and Selvarajan, A and Srinivas, T (2005) A Method to Discriminate Strain and Temperature in Fiber Bragg Grating Sensors. In: SICon/05-Sensors for Industry Conference, 8th-10th February 2005, Houston,Texas,USA, pp. 126-128.


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A significant limitation to the applications of fiber Bragg gratings (FBG) sensors is the sensitivity of the Bragg wavelength to both temperature and strain, complicating the independent measurement of these paremeters. In this letter, we explore a new method to discriminate strain and temperature in FBG sensors, which utilises the additioanl wavelength dependent phase introduced by Fiber Bragg grating written on sensing arm of Mach Zehnder Interferometer (MZI). The intensity variations of the MZI output at the wavelength outside the Bragg resonance provide an additional parameter along with the Bragg wavelength shift observed at the input end for simultaneous measurement of strain and temperature.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to ISA - The Instrumentation, Systems and Automation Society.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Prasant Kumar Pattnaik
Date Deposited: 10 Aug 2006
Last Modified: 19 Sep 2010 04:31
URI: http://eprints.iisc.ac.in/id/eprint/8273

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