Bulg. J. Phys. vol.33 no.s3 (2006), pp. 186-193

Femtosecond Optical Vortices

A. Dreischuh1,5, K. Bezuhanov1, G.G. Paulus2,3,4, M. Schätzel2,3, H. Walther2,3, D.N. Neshev5, W. Królikowsk5, Yu.S. Kivshar5
1University of Sofia, Department of Quantum Electronics, 5 James Bourchier Blvd., BG-1164 Sofia, Bulgaria
2Max-Planck-Institut füur Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
3Ludwig-Maximillians-Universität, Sektion Physik, Am Coulombwall 1, D-85747 Garching, Germany
4Texas A&M University, Department of Physics, College Station, TX 77843-4242, USA
5Nonlinear Physics Centre and Laser Physics Centre, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT
Abstract. 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.

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