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Type: Journal article
Title: Enhancing the radiation efficiency of dye doped whispering gallery mode microresonators
Author: François, A.
Rowland, K.
Afshar Vahid, S.
Henderson, M.
Monro, T.
Citation: Optics Express, 2013; 21(19):22566-22577
Publisher: Optical Soc Amer
Issue Date: 2013
ISSN: 1094-4087
Statement of
Alexandre François, Kristopher J. Rowland, Shahraam Afshar V., Matthew R. Henderson, and Tanya M. Monro
Abstract: We present a novel form of a Whispering Gallery Mode (WGM) sensor that exploits dye doped polystyrene microspheres, as active resonators, positioned onto the tip of a Microstructured Optical Fiber (MOF) as a means of overcoming the limited Q-factors for small resonators. We show that it is possible to substantially enhance the fluorescence emission of selected WGMs of the microspheres, resulting in an increase of the signal-to-noise ratio of the modes and of the effective Q-factor. This is done by positioning the resonator into one of the holes of a suspended core MOF and matching the resonator diameter with the hole diameter where it sits, effectively breaking the symmetry of the environment surrounding the sphere. Furthermore we demonstrate that using this experimental configuration, the lasing efficiency of the dye-doped microspheres is also significantly enhanced, which also contributes to an enhancement in the observed Q-factor.
Rights: ©2013 Optical Society of America
DOI: 10.1364/OE.21.022566
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