FIELD: laser engineering.
SUBSTANCE: annular disc-shaped laser unstable resonator consists of an imaging system formed by an amplifying unit and a telescope for increasing the diameter of the laser beam, which is located between the amplifier unit and the feedback mirror telescope, as well as nonreciprocal optical element and rotary mirrors. At the same time amplifying unit, in its turn, consists of additional telescope for image transfer, two reflecting mirrors with concave spherical mirror surface and or two additional rotary mirrors in combination with one disk active element, or one additional rotary mirror in combination with two disk active elements.
EFFECT: technical result consists in providing output laser signal with close to diffraction beam quality and average power of several kilowatts and more.
1 cl, 6 dwg
