Tm-Doped Fibre Laser Pumped Cr²⁺:ZnSe Poly-Crystal Laser

Demonstrations of cw lasing in Cr²⁺:ZnSe poly-crystal are reported. The laser consists of a 1.7-mm-thick Cr²⁺:ZnSe poly-crystal disc pumped by a Tm-silica
double-clad fibre laser at 2050nm. Using a concave high-reflection mirror with a radius of curvature of 500mm as the rear mirror, the laser delivers up to 1030mW of radiation around 2.367μm.