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Conferences > FiO > 2003 > MT > MT71

Enhanced evanescent-wave sensing using multimode coupling to microresonator whispering-gallery modes

A. T. Rosenberger, A. Naweed, G. Farca, and S. I. Shopova

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Abstract

Laser light coupled into the whispering-gallery modes of fused-silica microspheres can be used for cavity-enhanced evanescent-wave absorption sensing. It is shown how two orders of magnitude additional enhancement can be obtained by the simultaneous use of two modes of the tapered-fiber coupler, giving effective absorption path lengths of kilometers.

© 2003 Optical Society of America

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