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Related Experiment Videos

Local coupling-coefficient characterization in fiber Bragg gratings.

Ph Giaccari1, H G Limberger, R P Salathé

  • 1Institute of Applied Optics, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland.

Optics Letters
|April 22, 2003
PubMed
Summary

We developed a new technique to precisely measure fiber Bragg grating parameters. This method accurately determines local coupling coefficients with high axial resolution and minimal error, advancing grating characterization.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Fiber Bragg gratings (FBGs) are crucial optical components.
  • Accurate characterization of local FBG parameters is essential for device performance.
  • Existing methods may lack sufficient resolution or precision.

Purpose of the Study:

  • To introduce a novel method for characterizing the local parameters of fiber Bragg gratings.
  • To enable precise determination of the complex coupling coefficient along the grating length.

Main Methods:

  • Combines optical low-coherence reflectometry (OLCR) for complex impulse response measurement.
  • Employs layer-peeling algorithm for reconstruction of the complex coupling coefficient.
  • Applies the method to a nonhomogeneous grating sample.

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Main Results:

  • Achieved precise determination of the local coupling coefficient.
  • Demonstrated high axial resolution below 20 micrometers.
  • Reported maximum errors of less than 5% for both amplitude and phase.

Conclusions:

  • The proposed method offers accurate and high-resolution characterization of FBGs.
  • This technique is effective for nonhomogeneous gratings.
  • Enables improved design and fabrication of advanced fiber optic devices.