White light generated by femtosecond optical vortex beams

P. Hansinger, G. Maleshkov, I. L. Garanovich, D. V. Skryabin, D. N. Neshev, A. Dreischuh, G. G. Paulus

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Abstract

In this work we report detailed experimental and numerical investigation of the white light generation by singly and doubly charged optical vortices propagating in a Kerr medium, where spectral broadening and transfer of topological charge (TC) into emerging spectral satellites take place due to self-phase modulation and degenerate four-wave frequency mixing (FWFM). Experiments performed with different pump beams show excellent agreement with theory. Singly and doubly charged white light vortices are observed within more than ±200 nm bandwidth after nonlinear propagation in Argon gas. Our experiment and theory data confirm that the TC transformation of the newly generated spectral components follows a law analogous to the one for energy conservation in the FWFM process. We also present results on the white light vortex stability.

Original languageEnglish
Pages (from-to)681-690
Number of pages10
JournalJournal of the Optical Society of America B-Optical Physics
Volume33
Issue number4
DOIs
Publication statusPublished - 1 Apr 2016

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    Hansinger, P., Maleshkov, G., Garanovich, I. L., Skryabin, D. V., Neshev, D. N., Dreischuh, A., & Paulus, G. G. (2016). White light generated by femtosecond optical vortex beams. Journal of the Optical Society of America B-Optical Physics, 33(4), 681-690. https://doi.org/10.1364/JOSAB.33.000681