Refractive index measurement within a photonic crystal fibre based on short wavelength diffraction

Abstract

A new class of refractive index sensors using solid core photonic crystal fibres is demonstrated. Coherent scattering at the cladding lattice is used to optically characterize materials inserted into the fibre holes. The liquid to solid phase transition of water upon freezing to ice 1h is characterized by determining the refractive index. © 2007 by MDPI.