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Sensors 2008, 8(10), 6769-6776; doi:10.3390/s8106769
Article

Linear FBG Temperature Sensor Interrogation with Fabry-Perot ITU Multi-wavelength Reference

 and *
Received: 9 October 2008; in revised form: 20 October 2008 / Accepted: 28 October 2008 / Published: 29 October 2008
(This article belongs to the Section Physical Sensors)
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Abstract: The equidistantly spaced multi-passbands of a Fabry-Perot ITU filter are used as an efficient multi-wavelength reference for fiber Bragg grating sensor demodulation. To compensate for the nonlinear wavelength tuning effect in the FBG sensor demodulator, a polynomial fitting algorithm was applied to the temporal peaks of the wavelength-scanned ITU filter. The fitted wavelength values are assigned to the peak locations of the FBG sensor reflections, obtaining constant accuracy, regardless of the wavelength scan range and frequency. A linearity error of about 0.18% against a reference thermocouple thermometer was obtained with the suggested method.
Keywords: Fiber Bragg grating; Fabry-Perot filter; Fiber-optic temperature sensor Fiber Bragg grating; Fabry-Perot filter; Fiber-optic temperature sensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Park, H.-J.; Song, M. Linear FBG Temperature Sensor Interrogation with Fabry-Perot ITU Multi-wavelength Reference. Sensors 2008, 8, 6769-6776.

AMA Style

Park H-J, Song M. Linear FBG Temperature Sensor Interrogation with Fabry-Perot ITU Multi-wavelength Reference. Sensors. 2008; 8(10):6769-6776.

Chicago/Turabian Style

Park, Hyoung-Jun; Song, Minho. 2008. "Linear FBG Temperature Sensor Interrogation with Fabry-Perot ITU Multi-wavelength Reference." Sensors 8, no. 10: 6769-6776.



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