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Dependence of dynamic range, linearity and sensitivity of fiber Bragg grating system on bonded sensor length

Tahir, Bashir Ahmed and Ali, Jalil and Abdul Rahman, Rosly (2007) Dependence of dynamic range, linearity and sensitivity of fiber Bragg grating system on bonded sensor length. Optoelectronics And Advanced Materials-Rapid Communications, 1 (1). pp. 19-24. ISSN 1842-6573

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Abstract

This study aims to explain the effect of sensor length on dynamic range, linearity and sensitivity of fiber Bragg grating system. The sensing principle is based on tracking of Bragg wavelength shifts caused by the changes in loading condition. A simple experimental setup was utilized in which fiber grating was bonded on a Zinc plate using araldite as an epoxy on both sides of grating and an Optical Spectrum Analyzer to monitor the values of wavelength shift corresponding to the changing applying load. The dynamic range, linearity and sensitivity of fiber Bragg grating system in terms of wavelength shift and longitudinal strain are discussed. From the results, it is inferred that if the sensor length is smaller, then Bragg wavelength shift, longitudinal strain and dynamic range are larger and vice versa. It means that the fiber Bragg grating system is more sensitive to smaller sensor lengths and less sensitive to larger sensor lengths. A linear response has been observed between longitudinal strain and Bragg wavelength shift throughout the measured region.

Item Type:Article
Uncontrolled Keywords:fiber Bragg gratings, dynamic range, Bragg wavelength shift, sensor length
Subjects:Q Science > QC Physics
T Technology > TJ Mechanical engineering and machinery
Divisions:Science
ID Code:11680
Deposited By: Nor Asmida Abdullah
Deposited On:28 Dec 2010 01:58
Last Modified:28 Dec 2010 01:58

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