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Related Experiment Video

Updated: May 18, 2026

Writing Bragg Gratings in Multicore Fibers

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

Sampled Fiber Bragg Grating spectral synthesis.

L Rodriguez-Cobo¹, A Cobo, J M Lopez-Higuera

¹Photonics Engineering Group, Universidad de Cantabria Santander, Spain. luis.rodriguez@unican.es

|October 6, 2012

Summary

This summary is machine-generated.

This study introduces a new method to estimate deformation in Sampled Fiber Bragg Gratings (SFBG). The technique accurately reconstructs strain profiles using spectral analysis and optimization, achieving high repeatability and spatial accuracy.

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Area of Science:

Optical Engineering
Materials Science
Signal Processing

Background:

Fiber Bragg Gratings (FBGs) are widely used for sensing applications.
Characterizing deformation in FBGs is crucial for structural health monitoring and material analysis.
Existing methods may have limitations in accurately determining arbitrary deformation profiles.

Purpose of the Study:

To propose and experimentally validate a novel technique for estimating the longitudinal deformation profile of Sampled Fiber Bragg Gratings (SFBGs).
To develop a robust algorithm capable of reconstructing complex strain patterns from spectral data.

Main Methods:

Utilizing the intensity reflection spectrum of an SFBG to infer deformation.
Employing a custom error metric for comparing measured and synthetic spectra.
Implementing the Particle Swarm Optimization (PSO) technique to retrieve the deformation profile.

Main Results:

The proposed method successfully estimated arbitrary longitudinal deformation profiles in both simulated and experimental tests.
Demonstrated remarkable repeatability with errors less than 50 με.
Achieved good spatial accuracy in deformation profile reconstruction, with errors below 1 mm.

Conclusions:

The developed technique provides an accurate and reliable method for quantifying deformation in SFBGs.
The combination of spectral analysis and PSO offers a powerful tool for advanced strain sensing applications.
The experimental verification confirms the practical viability and effectiveness of the proposed deformation estimation method.