On possible manifestations of the induced transparency during laser evaporation of metals

The possible acoustic and optical manifestations of the induced transparency during laser evaporation of metals are analysed. It is shown that under certain conditions the photoacoustic effect related to the movement of the induced-transparency front can make an appreciable contribution to the total recoil pressure. The formation of the induced-transparent layer can be accompanied at the initial instant of time by both the decrease and the increase in the reflectance of the target. It is established that the laser intensity, required to realise the stationary regime of evaporation with induced transparency, is substantially lower than the threshold of plasma formation.