Vortices in femtosecond laser fields |
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| Authors: | Bezuhanov K Dreischuh A Paulus G G Schätzel M G Walther H |
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| Affiliation: | Department of Quantum Electronics, Sofia University, 5, J. Bourchier Boulevard, BG-1164 Sofia, Bulgaria. |
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| 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. |
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