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Proceedings Paper

Prospects for pratical and economic FOS solutions for automotive measurement applications
Author(s): Peter McGeehin
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Paper Abstract

The advancement of fibre optics in sensing has been inhibited in the last two decades by the lack of availability of suitable components. Whilst transduction principles have been fully explored, and some key applications (for example fibre optic gyroscopes) have moved forward, even the up-take of the ubiquitous fibre Bragg gratings as sensors is being inhibited by both practical and cost considerations. Optical sensors, it seems, can be created, but the means of extracting the information from them, building on the precision and systems advantages that fibre optics should bestow, has proved difficult. If sources, detectors and essential signal processing can be combined in such a way that, essentially, the benefits that fibre optics bestow in telecoms networks can be harnessed for sensing, then fibre optic sensing can truly be said to have realized its promise. Integrated optics modules employing silicon as both substrate and waveguide are being developed and deployed rapidly for telecommunications applications, through which they will become cost effective quite quickly. They have also been demonstrated as useful modules when employed in sensing systems as, for example, Sagnac and white light interferometers. In the latter form they have been employed to process signals in an optical system measuring the cylinder pressure in four-cylinder internal combustion engine. It is argued that this specific application, demanding as it is, illustrates the generic potential of such modules for broad application in many sensing situations.

Paper Details

Date Published: 29 December 2000
PDF: 8 pages
Proc. SPIE 4202, Industrial Sensing Systems, (29 December 2000); doi: 10.1117/12.411731
Show Author Affiliations
Peter McGeehin, Compton Consultants (United Kingdom)

Published in SPIE Proceedings Vol. 4202:
Industrial Sensing Systems
Anbo Wang; Eric Udd, Editor(s)

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