Enhancement of emission intensity by the use of a brillouin laser

It is shown that the intensity of emission from a laser based on the stimulated Brillouin scattering effect can be increased by raising the pumping level, the pumping energy density, and the duration of the pumping pulses above their threshold values. An experimental investigation was made of a CS₂ Brillouin laser whose emission intensity was raised in this way, and an ether Brillouin laser whose emission intensity was not increased. The CS₂ laser was pumped with ruby laser pulses which satisfied the conditions necessary for an increase in the emission intensity. The CS₂ laser was found to have the following parameters: energy efficiency 2%, divergence of the output radiation 3 · 10^–4 rad, enhancement of the emission intensity by a factor of nine. The efficiency of the ether laser was 20%.