1 May 1992 Spatially-weighted optical fiber sensing methods
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We present spatially-weighted optical fiber sensors that filter specific vibration modes from one dimensional beams placed in a clamped-free configuration. The sensitivity of the sensors is varied along the length of the fiber using two methods: 1) photo-induced refractive-index changes (gratings) in two-mode, e-core optical fibers, and 2) tapering two-mode, circular-core optical fibers. Selective vibration mode suppression on the order of 15 dB has been obtained using the weighted sensors. We describe experimental results and propose future applications for distributed sensors.
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Richard O. Claus, Richard O. Claus, "Spatially-weighted optical fiber sensing methods", Proc. SPIE 1777, First European Conference on Smart Structures and Materials, 17772H (1 May 1992); doi: 10.1117/12.2310195; https://doi.org/10.1117/12.2310195

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