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Updated: Jun 22, 2026

Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Optimizing the usable bandwidth and loss through core design in realistic hollow-core photonic bandgap fibers
Abstract:
The operational bandwidth of hollow-core photonic bandgap fibers (PBGFs) is drastically affected by interactions between the fundamental core mode and surface modes guided at the core-cladding interface. By systematically studying realistic hollow-core PBGFs we identify a new design regime robust in eliminating the presence of surface modes. We present new fiber designs with a fundamental core mode free of anticrossings with surface modes at all wavelengths within the bandgap, allowing for a low-loss operational bandwidth of ~17% of the central gap wavelength.
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