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Proceedings Paper

Acid-etched Fabry-Perot micro-cavities in optical fibres
Author(s): V. R. Machavaram; R. A. Badcock; G. F. Fernando
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Paper Abstract

Significant progress has been made in recent years on the design and fabrication of optical fibre-based sensor systems for applications in structural health monitoring. Two sensor designs have tended to dominate namely, fibre Bragg gratings and extrinsic fibre Fabry-Perot sensors. However, the cost and time associated with these sensors is relatively high and as a consequence, the current paper describes a simple procedure to fabricate intrinsic fibre Fabry-Perot interferometric strain sensors. The technique involves the use of hydrofluoric acid to etch a cavity in a cleaved optical fibre. Two such etched cavities were fusion spliced to create an intrinsic fibre Fabry-Perot cavity. The feasibility of using this device for strain monitoring was demonstrated. Excellent correlation was obtained between the optical and surface-mounted electrical resistance strain gauge.

Paper Details

Date Published: 1 November 2007
PDF: 7 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64231R (1 November 2007); doi: 10.1117/12.779661
Show Author Affiliations
V. R. Machavaram, Univ. of Birmingham (United Kingdom)
R. A. Badcock, Univ. of Birmingham (United Kingdom)
G. F. Fernando, Univ. of Birmingham (United Kingdom)

Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering
Shanyi Du; Jinsong Leng; Anand K. Asundi, Editor(s)

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