Abstract
We experimentally demonstrate an all solid-state laser producing single-frequency output at 473nm. Spatial gain hole-burning in the gain material has been eliminated by use of twisted-mode cavity approach. By carefully designing, a Z-cavity with two beam waists is chosen to provide the optimum beam radius in the gain medium Nd:YAG and second harmonic generation crystal LBO. A total output power of 85mW was achieved, when the laser was diode-end-pumped at an incident power of 3.5W, the light–light conversion efficiency is up to 2.4%.
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