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All-solid photonic bandgap fiber.

F Luan1, A K George, T D Hedley

  • 1Department of Physics, University of Bath, Bath BA2 7AY, UK. pypfl@bath.ac.uk

Optics Letters
|November 10, 2004
PubMed
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Researchers fabricated an ideal photonic bandgap fiber using two glasses. Light is guided by antiresonances in the cladding, enabling lossless guidance across multiple bandgaps without interface modes.

Area of Science:

  • Photonics and Optical Materials Science

Background:

  • Photonic bandgap fibers (PBFs) guide light using a microstructured cladding with a lower refractive index core.
  • Existing PBF designs can suffer from interface modes and limited guidance bandwidth.

Purpose of the Study:

  • To design and fabricate a novel photonic bandgap fiber.
  • To achieve ideal bandgap guidance with no interface modes and broad spectral coverage.

Main Methods:

  • Fabrication of a PBF using two distinct glass materials.
  • Utilizing the antiresonance effect within the fiber cladding for light confinement.

Main Results:

  • The fabricated fiber exhibits guidance solely due to the antiresonances of high-index strands in the cladding.
  • The structure functions as an ideal bandgap fiber, demonstrating the absence of interface modes.

Related Experiment Videos

  • Efficient light guidance was achieved across the full width of multiple photonic bandgaps.

    • Conclusions:

    • The developed two-glass photonic bandgap fiber represents an ideal structure for light guidance.
    • This design overcomes limitations of previous PBFs by eliminating interface modes and broadening guidance bandwidth.