FIELD: laser generating and amplifying device of unimode radiation for heat treatment of materials. SUBSTANCE: laser generating and amplifying device of unimode radiation has generator with passive laser gate and amplifier located after generator in direction of light beam path; amplifier has output convex mirror and active member; additional amplifier with output convex mirror and active member; beam splitter and optical system; objective lens for focusing light beam. Amplifiers are connected in parallel. Light beam of generator is divided by beam splitters and directed to inputs of amplifiers. Amplifiers are directed to one point located in optical system focus, and angle of convergence is determined by relation given in the invention description. EFFECT: higher radiation power density in zone of laser effect and longer service life of device. 1 dwg
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