1 January 1992 Two-mode elliptical-core weighted fiber sensors for vibration analysis
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Abstract
Two-mode, elliptical-core optical fibers are demonstrated in weighted, distributed and selective vibration-mode-filtering applications. We show how appropriate placement of optical fibers on a vibrating structure can lead to vibration mode filtering. Selective vibration-mode suppression on the order of 10 dB has been obtained using tapered two-mode, circular-core fibers with tapering functions that match the second derivatives of the modes of vibration to be enhanced. We also demonstrate the use of chirped, two-mode gratings in fibers as spatial modal sensors that are equivalents of shaped piezoelectric sensors.
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Ashish M. Vengsarkar, Kent A. Murphy, Brian R. Fogg, William V. Miller, Jonathan A. Greene, Richard O. Claus, "Two-mode elliptical-core weighted fiber sensors for vibration analysis", Proc. SPIE 1586, Distributed and Multiplexed Fiber Optic Sensors, (1 January 1992); doi: 10.1117/12.56507; https://doi.org/10.1117/12.56507
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