Improvement of the focusability of petawatt laser pulses after nonlinear
post-compression

Mikhail Martyanov; Sergey Mironov; Mikhail Starodubtsev; Alexander Soloviev; Anton Kochetkov; Vladislav Ginzburg; Andrey Shaikin; Efim Khazanov

doi:10.1364/JOSAB.460470

Journal of the Optical Society of America B
Vol. 39,
Issue 7,
pp. 1936-1944
(2022)
•https://doi.org/10.1364/JOSAB.460470

Improvement of the focusability of petawatt laser pulses after nonlinear post-compression

Mikhail Martyanov, Sergey Mironov, Mikhail Starodubtsev, Alexander Soloviev, Anton Kochetkov, Vladislav Ginzburg, Andrey Shaikin, and Efim Khazanov

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Mikhail Martyanov, Sergey Mironov, Mikhail Starodubtsev, Alexander Soloviev, Anton Kochetkov, Vladislav Ginzburg, Andrey Shaikin, and Efim Khazanov, "Improvement of the focusability of petawatt laser pulses after nonlinear post-compression," J. Opt. Soc. Am. B 39, 1936-1944 (2022)

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Abstract

The nonlinear nature of laser pulse post-compression inevitably leads to wavefront distortions. These distortions are nonstationary, i.e., they vary during the pulse, which significantly complicates the use of adaptive optics. We propose four approaches to compensation of wavefront distortions by means of standard adaptive mirrors, three of which can be implemented experimentally. Numerical simulations show that these approaches allow achieving a focal spot intensity close to the case of a perfectly flat wavefront.

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Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Param	Case 1	Case 2	Case 3	Case 4
Beam	Super-Gauss	Super-Gauss	Experimental	Experimental
$τ$ , fs FWHM	50	50	50	50
$I_{p e a k}, T W / c m^{2}$	3	3	3	3
$L$ , cm	1	3	1	3
$B$	5	15	5	15
$B_{r e a l}$	4.72	11.6	4.72	11.6
Near field, after compression
$τ$ , fs FWHM	15.0	7.02	19.6	9.78
$max P / max P_{0}$	2.85	5.55	2.22	3.98
At focus, after compression:
without wavefront correction
$τ$ , fs FWHM	15.0	8.18	19.6	11.7
$max P / max P_{0}$	2.82	4.64	2.19	3.20
$G$	1.10	1.64	1.02	0.39
$H$	0.42	0.26	0.53	0.13
Parabolic wavefront correction
$τ$ , fs FWHM	15.0	7.94	19.6	11.7
$max P / max P_{0}$	2.83	4.84	2.19	3.23
$G$	2.17	2.77	1.55	0.503
$H$	0.754	0.433	0.738	0.165
Approach I wavefront correction, $t^{*}$ at $max {P_{2}}$
$τ$ , fs FWHM	15.0	7.0	19.6	9.8
$max P / max P_{0}$	2.84	5.65	2.21	3.92
$G^{*}$	2.64	5.38	2.04	3.57
$H^{*}$	0.87	0.81	0.91	0.78
$H^{*}$ , limit	0.968	0.914	0.97	0.93

Abstract

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Equations (26)

Journal of the Optical Society of America B