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Proceedings Paper

Bias error in fiber optic gyroscopes due to elasto-optic interactions in the sensor fiber
Author(s): Friedemann Mohr; Frank Schadt
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Paper Abstract

It has become a standard to use Shupe's nonreciprocity formula for calculating the thermally induced bias error in fiber gyroscopes. This effect is initiated by thermal waves propagating through the material. However, it seems as if it has not been recognized yet that elastooptical interactions in the fiber can also lead to a nonreciprocity effect. In this case it is not required that a thermal wave propagate through the material, a simple temperature change -- even if homogeneous -- would have the same effect. In this contribution, we demonstrate the nature of the effect and, based upon the standard architecture of a sensor coil assembly, report on calculations (including FEM) elucidating the origination of elastic stress leading to a nonreciprocity.

Paper Details

Date Published: 9 June 2004
PDF: 4 pages
Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); doi: 10.1117/12.566654
Show Author Affiliations
Friedemann Mohr, Univ. of Applied Sciences/Pforzheim (Germany)
Frank Schadt, Univ. of Applied Sciences/Pforzheim (Germany)

Published in SPIE Proceedings Vol. 5502:
Second European Workshop on Optical Fibre Sensors
Jose Miguel Lopez-Higuera; Brian Culshaw, Editor(s)

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