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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 19 — Sep. 23, 2013
  • pp: 22566–22577

Enhancing the radiation efficiency of dye doped whispering gallery mode microresonators

Alexandre François, Kristopher J. Rowland, Shahraam Afshar, V., Matthew R. Henderson, and Tanya M. Monro  »View Author Affiliations

Optics Express, Vol. 21, Issue 19, pp. 22566-22577 (2013)

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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.

© 2013 OSA

OCIS Codes
(140.3945) Lasers and laser optics : Microcavities
(060.4005) Fiber optics and optical communications : Microstructured fibers
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:

Original Manuscript: July 23, 2013
Revised Manuscript: September 5, 2013
Manuscript Accepted: September 5, 2013
Published: September 18, 2013

Alexandre François, Kristopher J. Rowland, Shahraam Afshar V., Matthew R. Henderson, and Tanya M. Monro, "Enhancing the radiation efficiency of dye doped whispering gallery mode microresonators," Opt. Express 21, 22566-22577 (2013)

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