New methods for precise control of main parameters of LD-pumped solid-state lasers assigned for spectroscopic
applications have been developed. Tunable lasing in wide range has been achieved. Active elements on the base of
crystals (Nd3+:YAG, Nd3+:YVO4) and glasses (Er,Yb doped boro-silico-phosphate glass) were used. The active crystals with uniform and non-uniform distribution of the activator ions were studied. Output beams with high quality and
polarization degree have been realized.