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Proceedings Paper

Optomechanical fiber gyroscope
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Paper Abstract

We report a miniature mechanical gyroscope that utilizes optical means to detect rotation-induced displacements in a mechanical structure. It utilizes the Foucault pendulum principle used in some existing MEMS gyroscopes: a rotating reference frame induces a Coriolis force that oscillates the structure about an axis orthogonal to the driving-mode axis. The main difference with similar MEMS gyroscopes is that this rotation-induced oscillation is sensed using a pair of high-finesse fiber Fabry-Perot displacement sensors instead of a capacitive device. The drive axis is also driven by radiation pressure inside a set of auxiliary fiber Fabry-Perot cavities, making this device immune to electromagnetic interference. Calculations predict that a rotation sensitivity on the order of 1°/h/Hz1/2 is achievable. We show that this structure solves several problems associated with MEMS gyroscopes utilizing electrostatic sensing methods.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750345 (5 October 2009); doi: 10.1117/12.835141
Show Author Affiliations
Onur Kilic, Stanford Univ. (United States)
Onur Can Akkaya, Stanford Univ. (United States)
Hyejun Ra, Stanford Univ. (United States)
Michel Digonnet, Stanford Univ. (United States)
Gordon Kino, Stanford Univ. (United States)
Olav Solgaard, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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