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Opt Lett. 2004 Aug 15;29(16):1942-4.

Vortices in femtosecond laser fields.

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  • 1Department of Quantum Electronics, Sofia University, 5, J. Bourchier Boulevard, BG-1164 Sofia, Bulgaria.

Abstract

We experimentally generate optical vortices in the output beam of a 20-fs Ti:sapphire laser. Screw phase dislocations are imposed on the spectral components of the short pulses by aligning a computer-generated hologram in a dispersionless 4f setup.

PMID:
15357367
[PubMed]
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