Surface optical strength of optical and laser glasses subjected to picosecond pulses

摘要

A study was made of the surface damage to optical and laser glasses by a single laser pulse of 5 ps duration at the wavelength of 1.054 mm and by a train of 20 such pulses. The single-pulse damage threshold was 1—2.5 J cm-2 in terms of the energy density or 200—500 GW cm-2 in terms of intensity. The damage threshold for a train of pulses was considerably less than the single-pulse threshold.