FIELD: laser devices, in particular, pulse lasers with Q-factor modulation and non-linear conversion of output frequency. SUBSTANCE: device has splitting polarizer, rotating mirrors which close resonator optical axis which is split by polarizer. Angle Φ between internal polarization plane of polarizer and axis Z of non- linear crystal conforms to condition of 0<Φ<90°. EFFECT: decreased laser beam dissipation which is caused by polarization losses in non-linear second-type element. 1 dwg
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