Abstract
Whispering-gallery modes (WGMs) on -doped glass microspheres with a radius of 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 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
Full Article | PDF ArticleMore Like This
L. L. Martín, C. Pérez-Rodríguez, P. Haro-González, and I. R. Martín
Opt. Express 19(25) 25792-25798 (2011)
Kyriaki Kosma, Gianluigi Zito, Kay Schuster, and Stavros Pissadakis
Opt. Lett. 38(8) 1301-1303 (2013)
L. Arques, A. Carrascosa, V. Zamora, A. Díez, J. L. Cruz, and M. V. Andrés
Opt. Lett. 36(17) 3452-3454 (2011)