On the quasi-classical theory of a Q-switched TW-laser

The paper presents the results of a rigorous calculation of processes involving giant pulse generation when variations of population and fields along the cavity are essential. It is shown that when the amplification factor of the active medium is high, the generation process is changed and new phenomena occur, which result in pulsations of the output radiation pulse. One of these phenomena is similar to population oscillations studied earlier for the case of an amplifier. The second phenomenon consists of "self-modulation" of the wave, and breaks the single-mode oscillation.