Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3657150
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- German Research Foundation (DFG) within the Research Training Group [1355]
- Joachim Herz Stiftung
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We report continuous wave deep ultraviolet laser operation at 261.3 nm by intracavity frequency doubling of laser diode pumped Pr3+ doped LiYF4 lasers. Using two InGaN laser diodes with a maximum output power of about 1 W each, a 2.9 mm long Pr3+:LiYF4 crystal and a 5 mm long beta-barium-borate crystal, coherent radiation with an output power of 481 mW at 261.3 nm was achieved at an optical-to-optical efficiency of 26.1% with respect to the total pump power. Both, linear and nonlinear losses have been calculated to be approximately 0.6% by using a model for intracavity frequency doubling with focussed Gaussian beams. (C) 2011 American Institute of Physics. [doi:10.1063/1.3657150]
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