Asymmetrically infiltrated twin core photonic crystal fiber for dual-parameter sensing

摘要

We demonstrate a fiber-optic dual parameter sensor based on a water filled Mach-Zehnder interferometer. Such a sensor is fabricated by asymmetrically infiltrating a twin core photonic crystal fiber with water, and splicing it between single mode fibers. Two sets of interference fringes which result from multi-mode interference are obtained by such a structure. By measuring the wavelength shift of the small fringe and the big envelop of the spectrum, strain and temperature can be determined simultaneously. (C) 2016 Elsevier Ltd. All rights reserved.