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.
© 2013 OSA
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
C. Lee, Y. Zheng, and H. Chang, "Directional fiber-optic level meter based on a micro-air- bubble drifted in a liquid core fiber Fabry-Pérot interferometer," in CLEO: 2013, OSA Technical Digest (online) (Optical Society of America, 2013), paper JW2A.57.