Amplified spontaneous radiation emitted from disk laser amplifiers

An analysis is made of the threshold conditions for the generation of stray oscillation modes in disk laser amplifiers and of amplified spontaneous radiation when the threshold is not reached. A comparison is made of the various methods for reducing the reflectivity of the disk surface. A calculation is made of the increase in the rate of decay of the population inversion in the prescence of amplified spontaneous radiation, which has a considerable influence on the energy characteristics of large-aperture disk amplifiers. The nature of the angular distribution of the amplified spontaneous radiation emerging for a disk amplifier is determined.