HIGH-EFFICIENCY MIDDLE IR PARAMETRIC SUPERRADIANCE IN ZNGEP2 AND GASE CRYSTALS PUMPED BY AN ERBIUM LASER

[摘要] Parametric superradiant (resonator free) generation in nonlinear crystals of ZnGeP2 and GaSe (type I phase matching) was obtained for the first time. As a pump source 110 ps pulses from the actively mode locked Er:YAG laser (2.94-mu-m) were used. The tuning range achieved was 4-10-mu-m (ZnGeP2) and 3.5-18-mu-m (GaSe). In case of ZnGeP2 (42 mm crystal) and type II phase matching the quantum efficiency reached 17.6%, corresponding to the output peak power of 3 MW near 5-6-mu-m.

[发布日期] 1991-06-15