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Proceedings Paper

Flexible control of nonlinear processes under femtosecond filamentation using adjustable high-pressure gases and supercritical fluids
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Paper Abstract

We demonstrate a novel approach of femtosecond laser pulse spectral-temporal control under filamentation in a wide range of pressures from 5 bar up to supercritical state. We showed that laser-induced processes such as supercontinuum generation and pulse self-compression could be tuned both by pressure and by energy adjustment due to the nonlinear refractive index alteration via pressure change. Thanks to the high pressure-controlled nonlinearity, a broadband (from 250 to 2500nm) supercontinuum with total efficiency more than 50% of energy can be generated in supercritical Xe and CO2. It was also demonstrated that the femtosecond laser pulse can be compressed in Xe in the femtosecond monofilamentation mode by 3.5 times with efficiency as high as 60%.

Paper Details

Date Published: 30 April 2019
PDF: 7 pages
Proc. SPIE 11026, Nonlinear Optics and Applications XI, 1102604 (30 April 2019); doi: 10.1117/12.2520937
Show Author Affiliations
E. I. Mareev, M.V. Lomonosov Moscow State Univ. (Russian Federation)
F. V. Potemkin, M.V. Lomonosov Moscow State Univ. (Russian Federation)
E. A. Migal, M.V. Lomonosov Moscow State Univ. (Russian Federation)
N. V. Minaev, Institute of Photon Technologies of Federal Scientific Research Ctr. (Russian Federation)
V. M. Gordienko, M.V. Lomonosov Moscow State Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 11026:
Nonlinear Optics and Applications XI
Mario Bertolotti; Alexei M. Zheltikov, Editor(s)

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