Hollow-core fibers for curvature sensing

We develop on an approach for assessing curvature variations by using hollow-core photonic crystal fibers. The sensing method described herein relies on an azimuthally asymmetric tubular-lattice hollow fiber and explores the bend-induced spectral shifts of the cladding tubes’ resonances. By numerically analyzing the transmission properties of such fiber architecture, we show that this platform can detect both curvature magnitude and angle. We understand that this study widens the framework for hollow-core fibers applications within the sensing scenario.