Giantically blue-shifted visible light in femtosecond mid-IR filament in fluoridesстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 марта 2016 г.
Аннотация:A giant blue shift (more than 3000 nm) of an isolated visible
band of supercontinuum was discovered and studied in the single filament
regime of Mid-IR femtosecond laser pulse at powers slightly exceeding
critical power for self-focusing in fluorides. At the pulse central wavelength
increasing from 3000 nm to 3800 nm the spectral maximum of the visible
band is shifted from 570 nm and 520 nm up to 400 nm and 330 nm for BaF2
and CaF2, respectively, its spectral width (FWHM) being reduced from 50 –
70 nm to 14 nm. It is shown that the formation of this narrow visible wing is
a result of the interference of the supercontinuum components in the
anomalous group velocity dispersion regime.