Max-Planck-Institute for Gravitational Physics, Albert-Einstein-Institute, and Institut für Gravitationsphysik, Leibniz Universität Hannover, Callinstrasse 38, D-30167 Hannover, Germany.
Opt Lett. 2010 Nov 15;35(22):3742-4. doi: 10.1364/OL.35.003742.
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.
二次谐波产生的非线性效应是实现高功率绿光激光源的有效方法。但是，当提高谐波光功率时，文献中报道的许多装置都受到转换效率降低或基频激光功率的限制。在这里，我们报告了在由三硼酸锂晶体构成的外光学谐振腔内，通过二次谐波产生，从 149 W 的基频功率获得 532nm 连续波 134W 激光的实验结果。外转换效率为 90%。谐波光由单根谱线组成，至少 97%的光以基频横模形式输出。
