Fiber optic highly over-coupled coupler sensors
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Authors
Brown, D.A.
Chen, M.
Morse, T.F.
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1996-04-01
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Abstract
We report on the development of prototype vibration and acoustic motion sensors using highly over-coupled couplers (HOCC). A HOCC fabricated with equal power in both arms after 550 optical power transfer cycles and when illuminated with a light source of 15 {mu}W at a wavelength of 850 nm, this device has a sensitivity of 0.9 {mu}W/{mu}m. A prototype of an optical fiber vibration sensor was made by clamping the 550 cycled HOCC to a cantilever stage to which a vibration source was attached. The maximum linear range of this particular prototype is 12 {mu}m. We have also demonstrated a HOCC having 2150 cycles at 850 nm which has a sensitivity of 4 {mu}W/{mu}m. A HOCC sensor has the possible advantages of high resolution, low cost, and all fiber structure. {copyright} {ital 1996 American Institute of Physics.}
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The article of record as published may be found at http://dx.doi.org/10.1063/1.50344
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Journal Name: AIP Conference Proceedings; Journal Volume: 368; Journal Issue: 1; Conference: Acoustic velocity sensor focused workshop, Mystic, CT (United States), 12-13 Sep 1995; Other Information: PBD: Apr 1996
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.