Investigation of the energy balance components for a plane target irradiated with a picosecond laser pulse

摘要

The scattering and absorption of a high-power picosecond laser pulse by a slid target were investigated experimentally making use of the `Progress-P' Nd:glass laser facility (λ=1053 nm, τ=1.4 ps) at radiation intensities I=~16-10~19 W cm~-2 on the target surface. It was found that, for I<=10~17 W cm~-2, more than 30/100 of the intensity of the scattered light was contained in the specularly reflected component. The absorption coefficient of the laser radiation with intensities ranging from 10~18 to 10~19 W cm~-2 was higher for targets made of materials with higher atomic numbers.