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Multicrystal, continuous-wave, single-pass second-harmonic generation with 56percent efficiency

机译:效率高达56%的多晶,连续波,单通二次谐波发生器

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摘要

We report a simple and compact implementation for single-pass second-harmonic-generation (SP-SHG) of cw laser radiation, based on a cascaded multicrystal (MC) scheme, that can provide the highest conversion efficiency at any given fundamental power. By deploying a suitable number of identical 30-mm-long MgO:sPPLT crystals in a cascade and a 30 W cw Yb-fiber laser at 1064 nm as the fundamental source, we demonstrate SP-SHG into the green with a conversion efficiency as high as 56percent in the low-power as well as the high-power regime, providing 5.6 W of green output for 10 W and 13 W of green output for 25.1 W of input pump power. The MC scheme permits substantial increase in cw SP-SHG efficiency compared to the conventional single-crystal scheme without compromising performance with regard to power stability and beam quality.
机译:我们报告了一种基于级联多晶(MC)方案的连续波激光辐射单次谐波谐波(SP-SHG)的简单且紧凑的实现,该方案可以在任何给定的基本功率下提供最​​高的转换效率。通过在级联中部署适当数量的相同的30毫米长的MgO:sPPLT晶体和1064 nm的30 W cw Yb光纤激光器作为基本光源,我们将SP-SHG转换为绿色,转换效率很高在低功率和高功率状态下,其功率为56%,为10 W提供了5.6 W的绿色输出,为25.1 W的输入泵浦功率提供了13 W的绿色输出。与传统的单晶方案相比,MC方案可以显着提高cw SP-SHG效率,而不会影响功率稳定性和光束质量。

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