Abstract
We report the generation of 24-W green power, which, to our knowledge, is the highest level of green power achieved in cw modes. Intracavity frequency doubling of a simple Nd:YAG laser was performed with a 15-mm KTiOPO(4) crystal. The green power was stable, and the highest level of green power achievable was limited only by the maximum lamp input power. We obtained a similar level of green power by replacing the single 15-mm KTiOPO(4) crystal by a phase-unified multinonlinear crystal combination consisting of a 5-mm and a 10-mm KTiOPO(4) crystal.
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