Novel Liquid and Liquid Crystal Cored Fibre Bragg Gratings

Abstract

Tunable filters are useful for a number of applications. Recently, fibre Bragg gratings were written in poled silica fibres[1]. The reflectivity of the grating and partial tuning was subsequently achieved by the application of an electric field. An alternative scheme for a tunable filter is proposed in this paper using liquid-crystal or liquid cores.