Broadband emission spectrum dynamics of large water droplets exposed to intense ultrashort laser radiation.
We report on experiments on the interaction of a gigawatt femtosecond laser pulse train with hanging isolated millimeter-sized water droplets. A transparent droplet experienced explosive boiling-up and emitted light in the visible spectrum as a result of laser-induced plasma formed inside the droplet volume. The droplet emission spectra showed remarkable broadening, depending on the laser power. The role of pulse self-phase modulation in measured spectral broadening when the pulse propagates through the droplet is discussed.
Geints
Yuri E
YE
Zuev Institute of Atmospheric Optics SB RAS, 1 Zuev Square, Tomsk, 634021, Russia. ygeints@iao.ru
Kabanov
Andrey M
AM
Matvienko
Gennadii G
GG
Oshlakov
Victor K
VK
Zemlyanov
Alexander A
AA
Golik
Sergey S
SS
Bukin
Oleg A
OA