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Related Experiment Video

Updated: May 17, 2026

Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

Arrayed waveguide grating interrogator for fiber Bragg grating sensors: measurement and simulation.

Jan Koch1, Martin Angelmahr, Wolfgang Schade

  • 1Fraunhofer Heinrich-Hertz-Institute, Goslar, Germany. jan.koch@hhi.fraunhofer.de

Applied Optics
|November 7, 2012
PubMed
Summary

This study details a fiber Bragg grating (FBG) interrogation system using an arrayed waveguide grating (AWG). Simulations and experiments reveal how FBG spectral shapes impact AWG signals, crucial for accurate sensor calibration.

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Area of Science:

  • Optoelectronics
  • Fiber optic sensing
  • Photonics

Background:

  • Fiber Bragg gratings (FBGs) are widely used for sensing applications.
  • Arrayed waveguide gratings (AWGs) are key components for wavelength demultiplexing.
  • Accurate interrogation of FBG signals is essential for reliable measurements.

Purpose of the Study:

  • To analyze an FBG interrogation system employing intensity demodulation and AWG demultiplexing.
  • To investigate the impact of FBG spectral line shape on AWG signal characteristics.
  • To develop precise calibration functions for various FBG types.

Main Methods:

  • Detailed examination of an FBG interrogation system.
  • Measurement and simulation of system performance.

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Last Updated: May 17, 2026

Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

  • Analysis of FBG spectral line shape effects on AWG output.
  • Development of calibration functions using system simulation.

    • Main Results:

    • FBG spectral line shape significantly influences the signal obtained from an AWG.
    • Simulations enable rapid and accurate calibration function generation for diverse FBGs.
    • Even minor sidebands in nonapodized FBGs strongly affect signals from Gaussian-profile AWGs.

    Conclusions:

    • The spectral characteristics of FBGs are critical for AWG-based interrogation systems.
    • Accurate modeling is vital for calibrating non-ideal FBGs.
    • Understanding these interactions improves the precision of fiber optic sensing systems.