Abstract
Different ways of varying the output pulse duration in laser schemes comprising a powerful master oscillator, a multipass amplifier, and a stimulated Brillouin scattering (SBS) mirror are suggested and realized experimentally. Conditions are determined at which introduction of losses between a SBS mirror and an amplifier allow variation of the output pulse duration without any significant decrease in energy. The use of two different SBS media (SnCl4 and freon) allows construction of a laser where the output pulse duration is varied between 6 and 40 ns and the energy loss is no more than 30%.
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