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Localized high-intensity light structures during multiple filamentation of Ti:sapphire-laser femtosecond pulses along an air path D. V. Apeksimov, A. A. Zemlyanov, A. N. Iglakova [et al.]

Contributor(s): Zemlyanov, Alexander A | Iglakova, Anastasiya N | Kabanov, Andrej M | Kuchinskaya, Olesya I | Matvienko, Gennadij G | Oshlakov, Viktor K | Petrov, Aleksej V | Sokolova, Ekaterina B | Apeksimov, Dmitrij VMaterial type: ArticleArticleSubject(s): лазерное излучение | фемтосекундные импульсы | самофокусировка | филаментация | постфиламентационные световые каналыGenre/Form: статьи в журналах Online resources: Click here to access online In: Atmospheric and oceanic optics Vol. 31, № 2. P. 107-111Abstract: The results of experimental studies of the transverse structure of a laser beam after multiple filamentation are presented. A ring structure of radiation is formed around individual filaments in a beam cross section inside the multiple filamentation domain, and at a dozen meters from it a common ring structure starts forming surrounding postfilamentation light channels (PFC). It is shown that the spectra of the PFC, rings, and beam are significantly different. The ring spectrum broadens asymmetrically relative to the carrier wavelength and is mainly concentrated in the short wavelength region. The PFC spectrum has a significant and more symmetrical broadening and covers the range 630–1000 nm.
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Библиогр.: 16 назв.

The results of experimental studies of the transverse structure of a laser beam after multiple filamentation are presented. A ring structure of radiation is formed around individual filaments in a beam cross section inside the multiple filamentation domain, and at a dozen meters from it a common ring structure starts forming surrounding postfilamentation light channels (PFC). It is shown that the spectra of the PFC, rings, and beam are significantly different. The ring spectrum broadens asymmetrically relative to the carrier wavelength and is mainly concentrated in the short wavelength region. The PFC spectrum has a significant and more symmetrical broadening and covers the range 630–1000 nm.

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