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Abstract
We demonstrate a 511 W laser diode pumped compositeNd:YAG ceramic laser. The optical pumping system is consisted of fivelaser diode stacked arrays arranged in a pentagonal shape around theceramic rod whose size is Φ6.35×144 mm. When the pumping power is1600 W, the cw laser output up to 511 W at 1064 nm can be obtained with alinear plano–plano cavity, and the optical-to-optical efficiency is31.9%. To our knowledge, this is the highest value of laser output byusing a newly invented composite Nd:YAG ceramic rod as the gain medium.
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