LPG in perfluorinated GI-POF for concentration measurement in liquids

Abstract

This paper describes the manufacture of long period gratings (LPG) for liquid concentration sensing. The LPGs are made in perfluorinated polymer optical fiber point to point using a pulsed laser at 355 nm. A LPG of period 75 µm and a wavelength of resonance of 910 nm is used for measurement of water with different concentrations of sugar.