Photonics Research, 2017, 5 (2): 02000088, Published Online: Sep. 26, 2018   

Analytical formulation for the bend loss in single-ring hollow-core photonic crystal fibers Download: 941次

Author Affiliations
Max Planck Institute for the Science of Light, Staudtstr. 2, D-91058 Erlangen, Germany
Abstract
Understanding bend loss in single-ring hollow-core photonic crystal fibers (PCFs) is becoming of increasing importance as the fibers enter practical applications. While purely numerical approaches are useful, there is a need for a simpler analytical formalism that provides physical insight and can be directly used in the design of PCFs with low bend loss. We show theoretically and experimentally that a wavelength-dependent critical bend radius exists below which the bend loss reaches a maximum, and that this can be calculated from the structural parameters of a fiber using a simple analytical formula. This allows straightforward design of single-ring PCFs that are bend-insensitive for specified ranges of bend radius and wavelength. It also can be used to derive an expression for the bend radius that yields optimal higher-order mode suppression for a given fiber structure.

Michael H. Frosz, Paul Roth, Mehmet C. Günendi, Philip St.J. Russell. Analytical formulation for the bend loss in single-ring hollow-core photonic crystal fibers[J]. Photonics Research, 2017, 5(2): 02000088.

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