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Proceedings Paper

Whispering gallery mode pressure sensing
Author(s): T. Weigel; C. Esen; G. Schweiger; A. Ostendorf
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Paper Abstract

Optical resonances of microresonators, also known as whispering gallery modes, are attracting considerable interest as highly sensitive measuring devices with a variety of applications. Such resonators can be used for pressure, force or strain measurement. Droplets, embedded in an appropriate substrate, form perfect spheres due to their surface tension and can be used as optical resonators with high quality factors. The resonance frequencies of these droplets depend sensitively on their size and shape. Pressure changes affect the droplet shape. Therefore, pressure change can be measured with high sensitivity. In the work presented here, ethanol droplets embedded in a silicone matrix are considered. The shift of the resonance frequencies of microdroplets embedded in silicone as function of the applied pressure is investigated.

Paper Details

Date Published: 9 May 2012
PDF: 6 pages
Proc. SPIE 8439, Optical Sensing and Detection II, 84390T (9 May 2012); doi: 10.1117/12.921759
Show Author Affiliations
T. Weigel, Ruhr-Univ. Bochum (Germany)
C. Esen, Ruhr-Univ. Bochum (Germany)
G. Schweiger, Ruhr-Univ. Bochum (Germany)
A. Ostendorf, Ruhr-Univ. Bochum (Germany)

Published in SPIE Proceedings Vol. 8439:
Optical Sensing and Detection II
Francis Berghmans; Anna Grazia Mignani; Piet De Moor, Editor(s)

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