Paper A46

Femtosecond optical vortices

A. Dreischuh, K. Bezuhanov, G. G. Paulus, M. Schätzel, H. Walther, D. N. Neshev, W. Krolikowski, Yu. S. Kivshar


In this work we review recent results demonstrating the possibility to create spatial phase dislocations in broadband coherent optical fields. We consider optical system utilizing a computer generated hologram combined with spatial dispersion compensation. Analytical results describing three possible arrangements (dispersionless 4f -setup, 2f-2f-setup, and double-pass grating compressor scheme) are presented. Experimental data confirming the theoretical predictions are discussed.