Ultra High Average Power Diode Pumped Nd:YAG and Yb:YAG Laser

Building on previous work with rod-based solid-state lasers, we propose to investigate the utility of demonstrating 100 kW class diode-pumped Yb:YAG slab lasers by operating the laser cooling system at cryogenic (77 _K) temperatures. The major objectives of the proposed Phase I program are to extend our thermal and stress modeling to slab lasers, build a model of expected optical performance, and to develop one or two practical concepts for implementing an experimental demonstration. Following a successful Phase I program, during Phase II we would experimentally demonstrate the first cryogenically-cooled high-average-power solid-state laser. This work has obvious applications in ballistic missile defense and laser materials processing, and is expected to elucidate the high-average-power capability of Nd:YAG and Yb:YAG solid-state lasers operating at room temperature as well. LE Systems expects that the industrial and medical communities will benefit from the development of cryogenic cooled device, at all power levels.