Abstract

A method for highly efficient fourth harmonic generation (FHG) retaining spatiotemporal intensity distribution of broadband chirped laser pulses is proposed. It is based on the use of pulses with linear frequency chirps of equal absolute magnitudes and opposite signs at the oo-e type noncollinear second harmonic generation. Fourth harmonic generation can by obtained by the classical method, since the second harmonic pulse is narrowband and spectrally limited. A possibility to retain the three-dimensional (3D) structure of the field at FHG with a conversion efficiency ${\sim}60\%$ is demonstrated by the numerical simulation of 3D pulses with a quasi-ellipsoidal intensity distribution.

© 2021 Optical Society of America

Retaining 3D shape of picosecond laser pulses during optical harmonics generation

I. V. Kuzmin, S. Yu. Mironov, E. I. Gacheva, A. K. Poteomkin, and E. A. Khazanov
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Shaping of picosecond laser pulses with THz intensity modulation in the infrared, visible, and ultraviolet ranges

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Noncollinear frequency mixing and fourth-harmonic generation of oppositely chirped laser pulses

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J. Opt. Soc. Am. B 39(11) 2896-2904 (2022)

Features of noncollinear second harmonic generation by infrared laser pulses with opposite frequency chirps

I. V. Kuzmin, S. Yu. Mironov, M. A. Martyanov, and A. K. Potemkin
J. Opt. Soc. Am. B 40(1) 224-232 (2023)