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http://dx.doi.org/10.5369/JSST.2007.16.5.342

Signal processing of interferometric sensor using modified ramp modulation  

Kang, Hyun-Sook (Department of Electronics and Laser Engineering, and Institute for Laser Engineering, Kyung Hee University)
Yeh, Yun-Hae (Department of Electronics and Laser Engineering, and Institute for Laser Engineering, Kyung Hee University)
Publication Information
Journal of Sensor Science and Technology / v.16, no.5, 2007 , pp. 342-348 More about this Journal
Abstract
A high-speed signal processor for Fabry-Perot interferometric sensors using modified ramp modulation is implemented. The main idea for the signal processing is to find a modulation waveform that could induce a linear frequency change in a laser diode to linearize the relationship between the optical phase shift and measurand. It is found that the waveform could be modeled as the addition of a linear term and an exponential term. A signal processor adopting modified ramp modulation technique is implemented and evaluated to find linearity, drift and random walk of $<{\pm}1.5%$, $0.4^{\circ}C$, $5.28{\times}10^{-4}^{\circ}C/{\sqrt{Hz}}$.
Keywords
Fiber optic sensor; Fabry-Perot interferometer; signal processing; modified ramp modulation; frequency chirping;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 C. E. Lee and H. F. Taylor, ' Interferometric optical fibre sensors using internal mirrors', Electron. Lett., vol. 24, pp. 193- 194, 1988   DOI   ScienceOn
2 L. Goldberg, H. F. Taylor, and 1. F. Weller, 'Time dependent thermal effect s in current modulated semiconductor lasers', Electron. Lett., vol. 17, no. 7, pp. 497-499, 1981
3 T. G. Gia llorenzi, J. A. Bucaro, A. Dandridge, G. H. Siegel, Jr., J. H. Cole , S. C. Rashleigh, and R. G. Priest, 'Optical fiber sensor technology', IEEE J. Quantum Electron., vol. QE-18, pp. 626-665 , 1982
4 D. A. Jackson, A. Dandridge, and S. K. Sheem , 'Measurement of small phase shifts using a singlemode optical-fibe r interferometer', Opt. Lett., vol. 5, no. 4, pp. 139- 141, 1980   DOI
5 L. C. Gunderson, 'Fiber optics sensors', Optics News, vol. 15, no. 11, pp. 20-27, 1989
6 J. G. Kim and Y. H. Yeh, 'Measurement of optical frequency change in LD during pulse operation', The Kyung Hee J. of Laser Eng., vol. 17, pp. 1926, 2006
7 S. W. Kim, G. W. Seo, J. K. Yoon, S. W. Jang, Y. S. Yu, S. H. Lee, and S. W. Kang, 'Side polished fibe r optic UV sensor using evanescent coupling of photo-functional polymer', J. of the Korean Sensors socity, vol. 11, no. 6, pp. 335 -341, 2002   DOI
8 Y. Yeh, 'A signal processing tech nique for interferometric fiber-optic sen sors', J. of HanKook Kwonghak Hoeji, vol. 6, no. 4, pp. 365-372, 1995   과학기술학회마을
9 Y. I. Park and H. F. Taylor, 'A frequency ramped modulation technique for measurement with tiber optic sensor', The-6th Conference on Sensor Technology '95, pp. 86-9 1, 1995