BI Wei-hong, WU Guo-qing. Theoretical analysis of Bragg wavelength demodulation based on phaseshift fiber grating[J]. Journal of Applied Optics, 2006, 27(2): 140-143.
Citation: BI Wei-hong, WU Guo-qing. Theoretical analysis of Bragg wavelength demodulation based on phaseshift fiber grating[J]. Journal of Applied Optics, 2006, 27(2): 140-143.

Theoretical analysis of Bragg wavelength demodulation based on phaseshift fiber grating

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  • Corresponding author:

    BI Wei-hong

  • Received Date: September 06, 2004
  • Revised Date: September 23, 2005
  • The Bragg wavelength demodulation technology based on phaseshift fiber grating is proposed. One or more spectral windows with very narrow linewidth can be opened by the phaseshift fiber grating in the reflectance spectrum stopband, and the windows are moved with the variations of the phase shift linearly. In order to implement Bragg wavelength demodulation, the electric current tuning phaseshift technology was utilized in the experiment. The measurement temperature could reach 200℃ and the strain could reach 2000με when the phaseshift fiber grating with maximal wavelength offset of 2nm was used to do the tunable filtering. The experiment shows that the Bragg wavelength demodulation by the phaseshift fiber grating has reached the expected result. A new method is established to solve the demodulation of Bragg wavelength.
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