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http://dx.doi.org/10.5573/ieek.2013.50.3.146

An Intensity Based Self-referencing Fiber Optic Sensor Using Tunable Fabry-Perot Filter and FBG  

Choi, Sang-Jin (Department of Electrical Engineering, Smart Grid Research Center, Chonbuk National University)
Pan, Jae-Kyung (Department of Electrical Engineering, Smart Grid Research Center, Chonbuk National University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.3, 2013 , pp. 146-152 More about this Journal
Abstract
In this paper, we have proposed and experimentally demonstrated an intensity-based self-referencing fiber optic sensor. The proposed fiber optic sensor consists of a broadband light source (BLS), fiber Bragg grating (FBG), tunable Fabry-Perot (F-P) filter, and LabVIEW program. We define the measurement parameter (X) and the calibration parameter (${\beta}$) to determine the transfer function(H) of the self-referencing fiber optic sensor, and the validity of the theoretical analysis is confirmed by experiments. The self-referencing characteristic for the proposed system has been validated by showing that the measurement parameter (X) is invariant for BLS optical power attenuations of 0 dB, 3 dB, and 6 dB. Also, the measured result is irrelevant to the FBGs with different characteristics. This means that the proposed fiber optic sensor offers the flexibility for determining the FBGs needed for implementation. Experimental results for the proposed fiber optic sensor are in good agreement with a theoretical analysis for BLS optical power attenuations and for three FBG pairs with different characteristics. So, the proposed fiber optic sensor has several benefits, including the self-referencing characteristic and the flexibility to determine the FBGs.
Keywords
fiber optic sensor; self-referencing; intensity based; FBG; tunable F-P filter;
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Times Cited By KSCI : 1  (Citation Analysis)
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