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Frequency transformation of optical vortices upon nondegenerate multiwave interaction in dye solutions |
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| Authors: | O. G. Romanov D. V. Gorbach A. L. Tolstik |
| Affiliation: | (1) Department of Astronomy, University of Padova, vicolo dell’Osservatorio 3, 35122 Padova, Italy;(2) INAF—Astronomical Observatory of Capodimonte, salita Moiariello 16, 80131 Naples, Italy;(3) TASC National Laboratory, Area Science Park, 34012 Basovizza, Italy;(4) Department of Physics, University of Padova, via Marzolo 8, 35131 Padova, Italy;(5) CNR/INFM Laboratory for Ultraviolet and X-ray Optical Research and Department of Information Engineering, University of Padova, via Gradenigo 6/b, 35131 Padova, Italy |
| Abstract: | A method for inverting the topological charge of singular light beams with their simultaneous frequency transformation under multiwave interaction in media with resonant and thermal nonlinearities is proposed. Frequency-nondegenerate four-wave and six-wave interactions of optical vortices are experimentally implemented using an ethanol solution of a polymethine dye 3274U as a nonlinear medium. |
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