Dynamic micro-air-bubble drifted in a liquid core fiber Fabry-Pérot interferometer for directional fiber-optic level meter

摘要

We propose a dynamic, directional, and miniature fiber-optic level meter based on a micro-air-bubble drifted in a liquid-core fiber Fabry-Pérot interferometer. The proposed in-fiber level meter can detect the non-horizontal/horizontal state of an object/structure and also be able to discriminate the test structure inclining to the clockwise or counterclockwise directions by measuring the spectral responses of the proposed optical fiber device. Dynamic drifting of the micro air bubble in the tilted condition has been recorded which investigates the drifted directions correlated closely with the tilted directions in the fiber level meter.