Sengupta, Somnath and Ghorai, Swapan Kumar and Biswas, Palas (2016) Design of Superstructure Fiber Bragg Grating With Efficient Mode Coupling for Simultaneous Strain and Temperature Measurement With Low Cross-Sensitivity. IEEE Sensors Journal, 16 (22). pp. 7941-7949. ISSN 1530-437X

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Abstract

An efficient fiber-optic sensor based on a superstructure fiber Bragg grating (SFBG) for simultaneous strain and temperature measurement is numerically and experimentally demonstrated. The stain-insensitivity property of a specific LPG resonance band has been used to overcome the effect of cross-sensitivity. The strain sensitivities of the FBG and LPG peaks of the proposed SFBG sensor have been obtained as 0.79 and -0.41 pm/mu epsilon, and their temperature sensitivities are found as 8.67 and 40.13 pm/degrees C, respectively. The resolutions for the strain and temperature measurements have been noted as +/- 12.83 mu epsilon and +/- 1.02 degrees C based on the wavelength resolution of an optical spectrum analyzer (FBG peak: 0.01 nm; LPG peak: 0.1 nm) and the deviations of measured values from applied ones of measurands. The proposed sensor has shown good agreement between the applied and measured measurands with good linearity and reduced cross-sensitivity.

Item Type:	Article
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	30 Jan 2017 12:47
Last Modified:	30 Jan 2017 12:47
URI:	http://cgcri.csircentral.net/id/eprint/3803

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