Compact fiber-optic vector inclinometer.
What we believe to be a novel fiber-optical inclinometer based on a dual-path core-to-cladding mode coupling mechanism is demonstrated. Both the amplitude and tilt direction of bends about a 2-mm-long flexure joint in an optical fiber can be determined. The sensor head consists of a nonadiabatic abrupt taper cascaded with a weakly tilted fiber Bragg grating. Measured bend angles of up to 12 degrees are demonstrated, as well as a method to increase the sensitivity for bend angles smaller than 4 degrees.
Shao
Li-Yang
LY
Department of Electronics, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6. liyangshao@gmail.com
Albert
Jacques
J