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Updated: May 29, 2026

Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

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A compact broadband microfiber Bragg grating.

Ming Ding1, Michalis N Zervas, Gilberto Brambilla

  • 1Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK. md20g09@orc.soton.ac.uk

Optics Express
|September 22, 2011
PubMed
Summary
This summary is machine-generated.

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A novel microfiber Bragg grating was fabricated using focused ion beam technology. This compact optical device offers strong grating performance with minimal periods, enabling sensing and communication applications.

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Optical microfibers offer a versatile platform for photonic devices.
  • Bragg gratings are crucial for wavelength-selective optical filtering and sensing.
  • Miniaturization of photonic devices is essential for advanced applications.

Purpose of the Study:

  • To develop a sub-10 micrometer microfiber Bragg grating using focused ion beam (FIB) technology.
  • To investigate the formation and characteristics of nanostructured gratings in optical microfibers.
  • To demonstrate the potential of these compact gratings for sensing and optical communications.

Main Methods:

  • Nanostructuring of a ~1 µm-diameter optical microfiber using focused ion beam (FIB) milling.
  • Fabrication of periodic structures with high refractive index contrast (glass/air).

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Last Updated: May 29, 2026

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  • Three-dimensional (3D) simulation for agreement with experimental results.

    • Main Results:

    • Successfully created a sub-10 µm long microfiber Bragg grating.
    • Achieved strong grating formation with only 20 periods due to high index contrast.
    • 3D simulations validated the experimental demonstration of the nanostructured grating.

    Conclusions:

    • Focused ion beam technology enables efficient nanostructuring of optical microfibers into compact Bragg gratings.
    • The fabricated gratings exhibit strong performance suitable for various applications.
    • This compact device holds promise for enhanced temperature/refractive index sensing and optical communication systems.