We demonstrate a 511 W laser diode pumped composite Nd:YAG ceramic laser. The optical pumping system is consisted of five laser diode stacked arrays arranged in a pentagonal shape around the ceramic rod whose size is Φ6.35 × 144 mm. When the pumping power is 1600 W, the cw laser output up to 511 W at 1064 nm can be obtained with a linear plano–plano cavity, and the optical-to-optical efficiency is 31.9%. To our knowledge, this is the highest value of laser output by using a newly invented composite Nd:YAG ceramic rod as the gain medium.
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Hai-feng et al. (2005) studied this question.
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