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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 4 — May. 4, 2011

Whispering-gallery modes in glass microspheres: optimization of pumping in a modified confocal microscope

L. L. Martín, P. Haro-González, I. R. Martín, D. Navarro-Urrios, D. Alonso, C. Pérez-Rodríguez, D. Jaque, and N. E. Capuj  »View Author Affiliations

Optics Letters, Vol. 36, Issue 5, pp. 615-617 (2011)

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Whispering-gallery modes (WGMs) on Nd 3 + -doped glass microspheres with a radius of 15 μm were measured in a modified confocal microscope, where a dual spatial resolution in both excitation and detection zones was possible. As an alternative to the standard excitation mechanism by an evanescent wave, we used an efficient pumping/ detecting scheme, focusing a laser in the microsphere and exciting the Nd 3 + ions, whose fluorescent emission produces the WGMs. We have also measured the generated WGMs by changing the detection zone, where higher amplitude resonances were found when exciting in the center and detecting at the edge of the microsphere.

© 2011 Optical Society of America

OCIS Codes
(170.1790) Medical optics and biotechnology : Confocal microscopy
(170.6280) Medical optics and biotechnology : Spectroscopy, fluorescence and luminescence

ToC Category:
Lasers and Laser Optics

Original Manuscript: November 9, 2010
Revised Manuscript: January 3, 2011
Manuscript Accepted: January 4, 2011
Published: February 17, 2011

Virtual Issues
Vol. 6, Iss. 4 Virtual Journal for Biomedical Optics

L. L. Martín, P. Haro-González, I. R. Martín, D. Navarro-Urrios, D. Alonso, C. Pérez-Rodríguez, D. Jaque, and N. E. Capuj, "Whispering-gallery modes in glass microspheres: optimization of pumping in a modified confocal microscope," Opt. Lett. 36, 615-617 (2011)

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