TEMPORAL CHARACTERISTICS OF LASERS WITH SHORT-TIME PERIODIC MODULATION OF LOSSES IN THE REGIME OF NONSTATIONARY SUPERMODES

Relying on the numerical model of a laser with short-time periodic mod ulation of losses, which provides satisfactory agreement with experime ntal results, we study the temporal characteristics of oscillation pul ses in the regime of nonstationary supermodes of high orders within br oad ranges of the main parameters of the system. We propose a method f or shortening laser pulses by selecting separate intensity spikes in z eroth-order nonstationary supermodes in the nonlinear stage. It is dem onstrated that deep periodic sinusoidal modulation of losses does not ensure a high (better than 40%) reproducibility of such a process. Gen erally, an additional increase or decrease in the Q factor in the begi nning of the nonlinear stage of oscillation does not provide an increa se in the reproducibility of separate spikes. We propose to improve th e reproducibility of such spikes by using a modulation function whose shape is asymmetric within the period.