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Proceedings Paper

Dual-resolution noncontact vibration and displacement sensor based upon a two-wavelength source
Author(s): Steven C. Bartlett; Faramarz Farahi; David A. Jackson
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Paper Abstract

A simple optical fibre sensor system based upon a two wavelength source is presented. The system may be operated in two modes: 1) a normal heterodyned interferometric sensor yielding nanometre resolution, and 2) a subcarrier system with much enhanced unambiguous range, but reduced resolution. Results indicate a displacement resolution of greater than 1mm, and vibration amplitude resolution of greater than 1Oim over a 22cm unambiguous range are achieveable. A major advantage of this system is that heterodyne signal processing has been achieved without the use of a frequency or phase shifter.

Paper Details

Date Published: 1 August 1990
PDF: 8 pages
Proc. SPIE 1267, Fiber Optic Sensors IV, (1 August 1990); doi: 10.1117/12.20309
Show Author Affiliations
Steven C. Bartlett, Univ. of Kent/Canterbury (United Kingdom)
Faramarz Farahi, Univ. of Kent/Canterbury (United Kingdom)
David A. Jackson, Univ. of Kent/Canterbury (United Kingdom)

Published in SPIE Proceedings Vol. 1267:
Fiber Optic Sensors IV
Ralf Th. Kersten, Editor(s)

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