Resonance Frequency of Optical Microbubble Resonators: Direct Measurements and Mitigation of Fluctuations

Resonance Frequency of Optical Microbubble Resonators: Direct Measurements and Mitigation of Fluctuations

This work shows the improvements in the sensing capabilities and precision of an Optical Microbubble Resonator due to the introduction of an encaging poly(methyl methacrylate) (PMMA) box. A frequency fluctuation parameter σ was defined as a score of resonance stability and was evaluated in the prese...

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Bibliographic Details
Main Authors: Alessandro Cosci, Simone Berneschi, Ambra Giannetti, Daniele Farnesi, Franco Cosi, Francesco Baldini, Gualtiero Nunzi Conti, Silvia Soria, Andrea Barucci, Giancarlo Righini, Stefano Pelli
Format: Article
Language:English
Published: MDPI AG 2016-08-01
Series:Sensors
Subjects:
microresonators
whispering gallery modes
stability
fluctuations
stabilization
Online Access:http://www.mdpi.com/1424-8220/16/9/1405
Description
Summary:This work shows the improvements in the sensing capabilities and precision of an Optical Microbubble Resonator due to the introduction of an encaging poly(methyl methacrylate) (PMMA) box. A frequency fluctuation parameter σ was defined as a score of resonance stability and was evaluated in the presence and absence of the encaging system and in the case of air- or water-filling of the cavity. Furthermore, the noise interference introduced by the peristaltic and the syringe pumping system was studied. The measurements showed a reduction of σ in the presence of the encaging PMMA box and when the syringe pump was used as flowing system.
ISSN:1424-8220

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