1 .O6-m Nd:YAG laser as well as 1.5-tm Yb:Er:glass one under transversal pulsed diode pumping are considered. At free running mode maximum slope efficiency was 3 1 .5 % and 3 1 % respectively. Excellent short-term stability of the output energy was demonstrated. In series of few tens of pulses the stanthrd deviation was less than 0.03 %. It is shown that noise of pumping radiation practically does not influence on spiking of Yb:Er:glass laser radiation, while it may strongly influence on spiking of Nd:YAG laser. Strong influence of weak reflection of laser radiation from an extra-cavity surface on spiking of Er:glass laser is observed. A conclusion is made that the radiation is rather coherent. Tuning of Er:glass laser spectrum within about 4 nm is obtained at low variation of output energy. Splitting of 1535-mn spectral line into several components is observed.
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