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3 March 2015 Strong localization of whispering gallery modes in an optical fiber via asymmetric perturbation of the translation symmetry
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Abstract
Recently introduced Surface Nanoscale Axial Photonics (SNAP) is based on whispering gallery modes circulating around the optical fiber surface and undergoing slow axial propagation. In this paper we develop the theory of propagation of whispering gallery modes in a SNAP microresonator, which is formed by nanoscale asymmetric perturbation of the fiber translation symmetry and called here a nanobump microresonator. The considered modes are localized near a closed stable geodesic situated at the fiber surface. A simple condition for the stability of this geodesic corresponding to the appearance of a high Q-factor nanobump microresonator is found. The results obtained are important for engineering of SNAP devices and structures.
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L. A Kochkurov and M. Sumetsky "Strong localization of whispering gallery modes in an optical fiber via asymmetric perturbation of the translation symmetry", Proc. SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII, 934316 (3 March 2015); https://doi.org/10.1117/12.2084374
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