Abstract
We demonstrated a 607 nm high-power continuous-wave (CW) orange laser based on a 12-mm-long a-cut Pr3+:YLF crystal with high slope efficiency and a low doping level. A maximum output power of 4.88 W with a slope efficiency of ~49% was achieved at an absorbed pump power of 12.15 W, and no output saturation power was observed. To improve the laser beam quality, we designed a concave-plane cavity and achieved an output power of 3.80 W with M2 factors of ~1.7 and ~2.2 in the horizontal and vertical directions, respectively, by means of a novel output coupler with tunable transmission. In addition, theoretical analyses were conducted to explain our designs, and the corresponding simulated results were presented.
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