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Proceedings Paper

Optical pressure sensor using a low-coherence light source with a highly birefringent fiber
Author(s): Preecha P. Yupapin; Kenneth Weir; Kenneth T. V. Grattan; Andrew W. Palmer
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Paper Abstract

A polarimetric interferometric based pressure sensor, using a photoelastic material as a sensing element is demonstrated. The light source used was a multimode laser diode, coupled into the system through a highly birefringent fiber to provide a reference bias signal. The arrangement of the sensor system produces birefringence in the sensing element, and a Michelson interferometer to which the light then passes is used for signal processing. The path difference induced by the pressure was measured by re-establishing the interference condition in this Michelson interferometer. The pressure to be measured was applied by placing a calibrated mass on the sensing element. Results are presented showing the potential of such a system for pressure sensor applications.

Paper Details

Date Published: 9 February 1993
PDF: 6 pages
Proc. SPIE 1712, 14th Symposium on Photonic Measurement, (9 February 1993); doi: 10.1117/12.140167
Show Author Affiliations
Preecha P. Yupapin, City Univ. (Thailand)
Kenneth Weir, City Univ. (United Kingdom)
Kenneth T. V. Grattan, City Univ. (United Kingdom)
Andrew W. Palmer, City Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 1712:
14th Symposium on Photonic Measurement

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