FIELD: quantum electronics. SUBSTANCE: optical cavity of laser is pyramid system of coaxial hybrid resonators tightly abutting against each other. They are formed by composite plate-type mirrors. Their central areas are made in the form of curvilinear convexo-concave focused surfaces of equal angular dimensions fully reflecting on both sides. Edge area of mirrors is shaped as planar ring partially transparent for laser beam. It edges central area of mirror and its outer diameter equals diameter of central area of adjacent larger mirror. Central areas of all mirrors are made of metal and alternately connected to unlike poles of high-frequency pump. EFFECT: enhanced laser-beam homocentricity and radiation power; simplified design. 4 dwg
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