High average power second harmonic generation in air

We demonstrate second harmonic vortex generation in atmospheric pressure air using tightly focused femtosecond laser beam. The circularly polarized ring-shaped beam of the second harmonic is generated in the air by fundamental beam of the same circular polarization, while the linear polarized beam p...

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Bibliographic Details
Main Authors: Beresna, Martynas (Author), Kazansky, Peter G. (Author), Svirko, Yuri (Author), Barkauskas, Martynas (Author), Danielius, Romas (Author)
Format: Article
Language:English
Published: 2009-09-21.
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