Amplitude-frequency characteristics of a rotating solid-state ring laser under transient acoustooptic mode locking conditions

An experimental study revealed the absence of competitive suppression of one of the counterpropagating waves in a rotating YAG:Nd³⁺ ring laser operated under transient acoustooptic mode locking conditions. This absence was attributed to different time shifts of the counterpropagating ultrashort pulses relative to a loss minimum in a modulation period on increase in the difference between the eigenfrequencies of the counterpropagating waves in the ring resonator. Two new ways of determination of the velocity of rotation of a solid-state ring laser were developed: one is based on splitting of the frequencies of cophasal modulation of the intensities of the counterpropagating waves under transient mode locking conditions and the other is based on the frequencies of relaxational oscillations under mode locking conditions.