FIELD: quantum electronics, lasers with face pumping incorporating elongated transparent laser elements. SUBSTANCE: elongated laser element is installed in tubular waveguide that has internal high- reflecting surface at some distance from its internal wall. Optical distances between various points on surface of laser element and internal circuit of waveguide change at least along part of laser element. EFFECT: enhanced operational efficiency of optically pumped laser device. 18 cl, 8 dwg
