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Continuous-wave single-frequency 532 nm laser source emitting 130 W into the fundamental transversal mode

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Abstract

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 134W of cw laser light at a wavelength of 532nm from a fundamental power of 149W 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.

© 2010 Optical Society of America

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