High repetition frequency laser on self-terminating calcium ion transitions

The results of experimental studies of the parameters of laser on self-terminating calcium ion transitions with $\lambda_1$ = 854.2 nm and with $\lambda_2$ = 866.2 nm under the excitation by pulses with nanosecond edges are presented. In the burst operation mode the average power of 5.3 W was obtained at a pulse repetition frequency of 90 kHz with lasing efficiency of $\sim$0.076%. It is demonstrated that at high pulse repetition frequency the specific energy of the laser are not inferior to the values of lasers on self-terminating transitions of the copper atom with a comparable volume of the active medium.