Linear FBG Temperature Sensor Interrogation with Fabry-Perot ITU Multi-wavelength Reference
Division of Electronics and Information Engineering, Chonbuk National University, Jeonju 561-756, Korea
*
Author to whom correspondence should be addressed.
Sensors 2008, 8(10), 6769-6776; https://doi.org/10.3390/s8106769
Received: 9 October 2008
/
Revised: 20 October 2008
/
Accepted: 28 October 2008
/
Published: 29 October 2008
(This article belongs to the Section Chemical Sensors)
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.
View Full-Text
▼
Show Figures
Graphical abstract
This is an open access article distributed under the Creative Commons Attribution License
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. https://doi.org/10.3390/s8106769
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. https://doi.org/10.3390/s8106769
Chicago/Turabian StylePark, Hyoung-Jun, and Minho Song. 2008. "Linear FBG Temperature Sensor Interrogation with Fabry-Perot ITU Multi-wavelength Reference" Sensors 8, no. 10: 6769-6776. https://doi.org/10.3390/s8106769
Find Other Styles
