Whispering gallery mode pressure sensing

T. Weigel; C. Esen; G. Schweiger; A. Ostendorf

doi:10.1117/12.921759

9 May 2012 Whispering gallery mode pressure sensing

T. Weigel, C. Esen, G. Schweiger, A. Ostendorf

Proceedings Volume 8439, Optical Sensing and Detection II; 84390T (2012) https://doi.org/10.1117/12.921759
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

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.

Citation Download Citation

T. Weigel, C. Esen, G. Schweiger, and A. Ostendorf "Whispering gallery mode pressure sensing", Proc. SPIE 8439, Optical Sensing and Detection II, 84390T (9 May 2012); https://doi.org/10.1117/12.921759

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