Self-action of femtosecond optical vortex in a medium with Kerr nonlinearity

Авторы: Shlenov S.A., Vasilyev E.V., Kandidov V.P., Dergachev A.A., Soyfer F.I.
Сборник: Progress in Photon Science, Springer Series in Chemical Physics
Серия: 125
Год издания: 2021
Номер статьи: 1
DOI: 10.1007/978-3-030-77646-6_1
Аннотация: We numerically study the dynamics of the formation of optical vortex fromcollimated Gaussian beam behind a spiral phase plate, and assess the characteristicscale of azimuthal instability developing in a Kerr medium. The near zero valuesof intensity on axes arise shortly after the plate but the ring profile is formed at thedistance of approximately half of the diffraction length. The break-up of the vortexinto several hot spots in the Kerr medium is more rapid for the large-scale noise. Thetransformation of the vortex spatial spectrum is analyzed along with changes in itsphase profile. The interference of the self-focusing mode and the radiation extendingto the periphery leads to the formation of rings in the beam spectrum.
Добавил в систему: Васильев Евгений Владимирович

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