Journal
OPTICS LETTERS
Volume 35, Issue 22, Pages 3742-3744Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.003742
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- Centre for Quantum Engineering and Space-Time Research (QUEST)
- International Max Planck Research School for Gravitational Wave Astronomy
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The nonlinear effect of second-harmonic generation is an efficient way to realize high-power green laser sources. But when scaling up the harmonic power, many setups reported in the literature have been limited by conversion efficiency degradation or the fundamental laser power. Here we report on the generation of 134 W of cw laser light at a wavelength of 532 nm from a fundamental power of 149 W by second-harmonic generation in an external optical resonator comprising a lithium triborate crystal. The external conversion efficiency was 90%. The harmonic light consisted of a single spectral line. At least 97% of it was emitted into the fundamental transversal mode. (C) 2010 Optical Society of America
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