Whispering-gallery mode excitation in a microdroplet illuminated by a train of chirped ultrashort laser pulses.
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.
Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences, Academician Zuev Square 1, Tomsk 634021, Russia. ygeints@iao.ru
Yurii E
YE
Geints
Alexander A
AA
Zemlyanov
Ekaterina K
EK
Panina