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Proceedings Paper

Two-dimensional optical fibre cantilever accelerometer
Author(s): Jun Li; J. N. Sun; M. M. Miliar; F. Z. Dong; R. R. J. Maier; D. P. Hand; W. N. MacPherson
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Paper Abstract

Focused Ion Beam (FIB) machining has been demonstrated to be capable of fabricating nano and micro scale elements onto optical fibres. In this paper we exploit FIB to fabricate core aligned 45° mirrors at the end of multi-core fibres (MCF). The resulting fibre is used as a component in a two dimensional optical fibre accelerometer. The mirror is produced using a two step process: first a scanning process is used to make a rough cut to define the overall mirror structure. This is followed by a polishing process to create an optical surface finish. The machined 45° mirror can be accurately aligned with optical fibre core, which avoids issues associated with the alignment of external turning mirror components. Proof-of-concept tests demonstrate the use of such a fibre as a two axis acceleration sensor that is interrogated interferometrically. The sensor operated between 0.5g and 4.5g with a cross talk of -24.3dB between axes.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96341E (28 September 2015); doi: 10.1117/12.2194681
Show Author Affiliations
Jun Li, Anhui Institute of Optics and Fine Mechanics (China)
J. N. Sun, Heriot-Watt Univ. (United Kingdom)
M. M. Miliar, Heriot-Watt Univ. (United Kingdom)
F. Z. Dong, Anhui Institute of Optics and Fine Mechanics (China)
R. R. J. Maier, Heriot-Watt Univ. (United Kingdom)
D. P. Hand, Heriot-Watt Univ. (United Kingdom)
W. N. MacPherson, Heriot-Watt Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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