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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 12 — Apr. 20, 2007
  • pp: 2205–2208

Accuracy improvement in peak positioning of spectrally distorted fiber Bragg grating sensors by Gaussian curve fitting

Hyun-Wook Lee, Hyoung-Jun Park, June-Ho Lee, and Minho Song  »View Author Affiliations

Applied Optics, Vol. 46, Issue 12, pp. 2205-2208 (2007)

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To improve measurement accuracy of spectrally distorted fiber Bragg grating temperature sensors, reflection profiles were curve fitted to Gaussian shapes, of which center positions were transformed into temperature information. By applying the Gaussian curve-fitting algorithm in a tunable bandpass filter demodulation scheme, 0.3 ° C temperature resolution was obtained with a severely distorted grating sensor, which was much better than that obtained using the highest peak search algorithm. A binary search was also used to retrieve the optimal fitting curves with the least amount of processing time.

© 2007 Optical Society of America

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 9, 2006
Revised Manuscript: January 6, 2007
Manuscript Accepted: January 7, 2007
Published: April 3, 2007

Hyun-Wook Lee, Hyoung-Jun Park, June-Ho Lee, and Minho Song, "Accuracy improvement in peak positioning of spectrally distorted fiber Bragg grating sensors by Gaussian curve fitting," Appl. Opt. 46, 2205-2208 (2007)

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