Curvature sensing with a hybrid-lattice hollow-core photonic crystal fiber

We report on curvature sensing measurements using a hybrid Kagome-tubular hollow-core photonic crystal fiber. The sensing principle is based on bending-mediated resonant couplings between core and airy cladding modes achieved at specific curvature radii and wavelengths. We consider that our investigation identifies a promising use of hollow-core fibers in sensing, thus broadening the application framework of this family of fibers.