Small-scale fluctuations of laser beam fluence at the large B-integral in ultra-high intensity lasers

Analytical expressions for the spatial spectrum of fluence fluctuations of a laser pulse propagating in a medium with Kerr nonlinearity have been obtained. It is shown that inhomogeneities with a spatial scale much larger than the critical scale of self-focusing grow insignificantly even at large va...

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Veröffentlicht in:Optics express 2023-01, Vol.31 (3), p.4667-4674
Hauptverfasser: Ginzburg, Vladislav, Martyanov, Mikhail, Silin, Dmitry, Kochetkov, Anton, Yakovlev, Ivan, Kuzmin, Alexey, Mironov, Sergey, Shaikin, Ilya, Stukachev, Sergey, Shaykin, Andrey, Khazanov, Efim
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Sprache:eng
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Zusammenfassung:Analytical expressions for the spatial spectrum of fluence fluctuations of a laser pulse propagating in a medium with Kerr nonlinearity have been obtained. It is shown that inhomogeneities with a spatial scale much larger than the critical scale of self-focusing grow insignificantly even at large values of the B-integral. Experiments using BK7 glass and a KDP crystal as a nonlinear medium confirm the obtained theoretical results. This may be interesting for pulse post-compression, frequency doubling, and other experiments using transmission optical elements in ultra-high intensity lasers.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.480792