EDGE-PUMP HIGH POWER MICROCHIP Yb:YAG LASER

摘要

This paper presents new concepts for pumping very thin active laser media at pump level of hundreds of watts, output performances obtained from Yb-based microchip laser. Continuous-wave (cw) laser operation at 1.03 μm with slope efficiency of 0.40 in Yb:YAG and low thermal lens was realized using an edge-pump configuration and a laser diode emitting at 0.94 μm. Over 90 W cw output power was demonstrated from Yb:YAG volume of 2 × 2 × 0.4 mm3. The optical phase distortion analysis gives focus shift bellow to 0.05 m and proves the absence of astigmatic effects. Two new architectures of thin disc concept were analysed numerically and experimentally. These new design allow very thin disk to be operated at high power level.