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Whispering-gallery mode excitation in a microdroplet illuminated by a train of chirped ultrashort laser pulses

Applied Optics, ISSN: 1539-4522, Vol: 48, Issue: 30, Page: 5842-5848
2009
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Article Description

The peculiarities of resonant optical field excitation inside a water microdroplet under illumination by a spatially bounded Gaussian beam with a temporal regime of a single chirped ultrashort laser pulse and a chirped pulse train are considered. It is established that the coupling efficiency of incident radiation to a selected high-Q whispering-gallery mode significantly depends on the interpulse interval in the train and chirping parameter of pumped laser radiation. The influence of the geometry of particle illumination by a laser beam and of the number of pulses in the train on the whispering-gallery mode buildup and its peak intensity is investigated. © 2009 Optical Society of America.

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