Asymmetric Spectral Broadening of 0.3 ps, 1030 nm Laser Pulse in BaWO4 Crystal

Asymmetric spectral broadening combined with an efficient transient stimulated Raman scattering is experimentally demonstrated in a BaWO 4 crystal pumped by 0.3 ps 515 nm laser pulse. This effect is explained by a non-instantaneity of the orientational Kerr nonlinearity that is for the first time ob...

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Bibliographic Details
Published in:Journal of Russian laser research 2022-05, Vol.43 (3), p.315-318
Main Authors: Kinyaevskiy, I. O., Kovalev, V. I., Koribut, A. V., Danilov, P. A., Smirnov, N. A., Kudryashov, S. I., Grudtsyn, Ya. V., Dunaeva, E. E., Trofimov, V. A., Ionin, A. A.
Format: Article
Language:English
Subjects:
Asymmetry
Crystals
Lasers
Microwaves
Nonlinear response
Nonlinearity
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Raman spectra
Refractivity
RF and Optical Engineering
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Summary:Asymmetric spectral broadening combined with an efficient transient stimulated Raman scattering is experimentally demonstrated in a BaWO 4 crystal pumped by 0.3 ps 515 nm laser pulse. This effect is explained by a non-instantaneity of the orientational Kerr nonlinearity that is for the first time observed in a solid medium. In this paper, we verify the nature of the asymmetric spectral broadening in a BaWO 4 crystal related to the “slow” Kerr nonlinear response. We demonstrate this fact by experiments with 0.3 ps 1030 nm laser pulse, namely, in conditions of no evident effect of stimulated Raman scattering on a self-phase-modulation-induced broadening of the pump pulse spectrum. The nonlinear refractive index and its decay time in the BaWO 4 crystal retrieved from 1030 nm wavelength data are in a good agreement with ones obtained for 515 nm wavelength.
ISSN:1071-2836
1573-8760
DOI:10.1007/s10946-022-10053-2