Abstract
We show that manipulation by a spatial profile of the refractive index of a circularly symmetric dielectric cavity results in a novel way of fine tuning frequency separations as well as spatial localizations of high-Q whispering-gallery modes excited in the cavity. The method permits dispersion compensation in the modes (spectrum equalization), diminishes the quality-factor limitation by surface roughness and contamination, and allows critical coupling to ultra-high-Q modes without maintaining an air gap with evanescent couplers.
© 2003 Optical Society of America
Full Article | PDF ArticleMore Like This
Michael J. Jory, Elaine A. Perkins, and J. Roy Sambles
J. Opt. Soc. Am. A 20(9) 1785-1791 (2003)
Vladimir S. Ilchenko, Andrey B. Matsko, Anatoliy A. Savchenkov, and Lute Maleki
J. Opt. Soc. Am. B 20(6) 1304-1308 (2003)
Andrey B. Matsko, Vladimir S. Ilchenko, Anatoliy A. Savchenkov, and Lute Maleki
J. Opt. Soc. Am. B 20(11) 2292-2296 (2003)