Abstract
The use of a nonlinear mirror on the basis of the stimulated Brillouin scattering (SBS) as part of a resonator in a laser oscillator leads to the generation of bandwidth due to the shift in frequency that is connected with the reflection at the SBS-mirror. Another effect of the nonlinear SBS-reflection is a passive Q-switch, which leads to a generation of pulses with durations of approximately 100 ns. An almost perfect locking of the longitudinal modes is observed if an additional external resonator is applied and certain resonance criteria are obeyed. This locking of the longitudinal modes surfaces as a splitting of the Q-switch pulses into trains of pulses with subnanosecond duration.
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