Miniature fiber optic pressure sensor based on interferometric technique

Nadarajah Narendran; L. Hoogenboom; S. Bardsley

doi:10.1117/12.180752

28 July 1994 Miniature fiber optic pressure sensor based on interferometric technique

Nadarajah Narendran, L. Hoogenboom, S. Bardsley

Proceedings Volume 2131, Biomedical Fiber Optic Instrumentation; (1994) https://doi.org/10.1117/12.180752
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Nadarajah Narendran, L. Hoogenboom, and S. Bardsley "Miniature fiber optic pressure sensor based on interferometric technique", Proc. SPIE 2131, Biomedical Fiber Optic Instrumentation, (28 July 1994); https://doi.org/10.1117/12.180752

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