Opto-Electronic Engineering, Volume. 40, Issue 9, 57(2013)

The Feature Extraction of Fiber Bragg Grating Based on Nonlinear Fitting of Peak-reflectivity by Sidebands

WANG Ju1、*, LIU Yin2, ZHANG Weijuan1, LI Kun1, LIU Jichao1, and ZHAO Yan1
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  • 1[in Chinese]
  • 2[in Chinese]
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    Considering the requirement of high accuracy, a novel Fiber Bragg Grating (FBG) modulation method to fit the FBG wavelength with multi-peak reflectivity is proposed. Application of Levenberg-Marquardt algorithm in fitting of peak-reflectivity by sidebands was discussed. The relation model was researched by reflecting central wavelength and peak-reflectivity of sidebands based on the reflex action of FBG for multi-wavelength source. Levenberg-Marquardt algorithm was used to extract the characters from the reflectance spectra to mark sensing information. Temperature resolution 0.1℃ and strain resolution 0.5 με is respectively obtained. The experimental results show that the new method has something referential value to give a guarantee to suit the high accurate measurement with FBG monitoring system.

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    WANG Ju, LIU Yin, ZHANG Weijuan, LI Kun, LIU Jichao, ZHAO Yan. The Feature Extraction of Fiber Bragg Grating Based on Nonlinear Fitting of Peak-reflectivity by Sidebands[J]. Opto-Electronic Engineering, 2013, 40(9): 57

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    Paper Information

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    Received: May. 16, 2013

    Accepted: --

    Published Online: Sep. 17, 2013

    The Author Email: Ju WANG (wangju_1990_2006@yahoo.com.cn)

    DOI:10.3969/j.issn.1003-501x.2013.09.010

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