Directional fiber-optic level meter based on a micro-air-bubble drifted in a liquid core fiber Fabry-Pérot interferometer

摘要

We propose a novel, directional fiber-optic level meter based on a micro-air-bubble drifted in a liquid-core fiber-Fabry-Pérot-interferometer which can detect non-horizontal state of structure/object and also be able to discriminate the inclining to clockwise/counterclockeise directions.