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Proceedings Paper

Miniature fiber optic pressure sensor based on interferometric technique
Author(s): Nadarajah Narendran; L. Hoogenboom; S. Bardsley
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Paper Abstract

An interferometric type fiber-optic pressure sensor is constructed by attaching a 125 micrometers single-mode fiber inside a 1.4 mm outer diameter miniature tubing capped with a 2.5 micrometers diaphragm. The optical fiber looks at the diaphragm displacement caused by pressure. The gap between the fiber end and the diaphragm forms a Fabry-Perot interferometer. The number of optical fringes at the output is directly related to the pressure acting on the diaphragm. A second sensor is constructed using a 925 micrometers outer diameter micro bellows. The fiber- optic sensor data compares well with a strain gauge type pressure transducer.

Paper Details

Date Published: 28 July 1994
PDF: 7 pages
Proc. SPIE 2131, Biomedical Fiber Optic Instrumentation, (28 July 1994); doi: 10.1117/12.180752
Show Author Affiliations
Nadarajah Narendran, Mechanical Technology Inc. (United States)
L. Hoogenboom, Mechanical Technology Inc. (United States)
S. Bardsley, Mechanical Technology Inc. (United States)


Published in SPIE Proceedings Vol. 2131:
Biomedical Fiber Optic Instrumentation
James A. Harrington; David M. Harris; Abraham Katzir; Fred P. Milanovich, Editor(s)

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