Bound states in the continuum in fiber Bragg gratings

Abstract

Optical fibers typically confine light through total internal reflection or through photonic bandgaps. Here we show that light can be perfectly guided in optical fibers through a different mechanism based on bound states in the continuum (BICs). In fibers with periodic Bragg gratings, we predict bona fide BICs in pure-polarization modes, as well as quasi-BICs in hybrid-polarization modes. These guided modes exist robustly without the need for fine structural tuning, and they persist even with the very small grating index contrasts that are available in conventional fiber Bragg gratings. The suppression of radiation loss arises from the coupling between a weakly-radiating mode and a strongly-radiating one. This finding opens the possibility of guiding light with BICs in optical fibers and their applications in distributed fiber sensors, in-line fiber filters, and high-power fiber lasers.

12 pages, 5 figures

References in corpus (14)

• Topological nature of bound states in the radiation continuum
• High-Q supercavity modes in subwavelength dielectric resonators
• Light interaction with photonic and plasmonic resonances
• Bound states in the continuum and Fano resonances in the strong mode coupling regime
• Observation of optical vortices in momentum space
• Formation of long-lived, scarlike modes near avoided resonance crossings in optical microcavities
• Anisotropy-induced photonic bound states in the continuum
• Experimental observation of symmetry protected bound state in the continuum in a chain of dielectric disks
• Quasi Bound States in the Continuum with Few Unit Cells of Photonic Crystal Slab
• Perfect Single-Sided Radiation and Absorption without Mirrors
• Bound states in the continuum through environmental design
• Bound states in the continuum with high orbital angular momentum in a dielectric rod with periodically modulated permittivity
• Bound States in the Continuum on Periodic Structures: Perturbation Theory and Robustness
• Fibers based on propagating bound states in the continuum

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