This article is cited in 4 papers

Control of laser radiation parameters

Enhancing the time contrast and power of femtosecond laser pulses by an optical wedge with cubic nonlinearity

E. A. Khazanov

Federal Research Center The Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod

Abstract: A method is proposed for enhancing the time-domain contrast of femtosecond laser pulses under nonlinear pulse compression by means of spectrum broadening due to the self-phase modulation with a following reflection from chirped mirrors. The contrast increases because the radiation of the pedestal is blocked by a square screen arranged in a focal plane of a unit-magnification telescope, and the main pulse 'bypasses' the screen, because a wedge in front of the telescope declines the pulse to a large angle due to a cubic nonlinearity.

Keywords: time-domain contrast, ultrahigh-power laser, cubic nonlinearity.

Received: 08.03.2021

 English version: Quantum Electronics, 2021, 51:5, 433–436

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