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High-power, continuous-wave, second-harmonic generation at 532 nm in periodically poled KTiOPO_(4)

机译:在周期性极化的KTiOPO_(4)中在532 nm处产生大功率连续波二次谐波

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摘要

We report efficient generation of high-power, cw, single-frequency radiation in the green in a simple, compact configuration based on single-pass, second-harmonic generation of a cw ytterbium fiber laser at 1064 nm in periodically poled KTiOPO_(4). Using a crystal containing a 17 mm single grating with period of 9.01 (mu)m, we generate 6.2 W of cw radiation at 532 nm for a fundamental power of 29.75 W at a single-pass conversion efficiency of 20.8percent. Over the entire range of pump powers, the generated green output is single frequency with a linewidth of 8.5 MHz and has a TEM_(00) spatial profile with M~(2) < 1.34. The demonstrated green power can be further improved by proper thermal management of crystal heating effects at higher pump powers and also by optimized design of the grating period to include thermal issues.
机译:我们报告了基于周期性极化KTiOPO_(4)的单通道二次谐波产生的1064 nm连续波长的fiber光纤激光器的简单,紧凑的配置,以简单,紧凑的配置在绿色环境中高效产生了大功率的cw单频辐射。 。使用包含17毫米,周期为9.01μm的单光栅的晶体,我们在532 nm处产生6.2 W的连续波辐射,其基本功率为29.75 W,单程转换效率为20.8%。在泵浦功率的整个范围内,生成的绿色输出为单频,线宽为8.5 MHz,并且具有TEM_(00)空间分布,M〜(2)<1.34。可以通过在较高泵浦功率下对晶体加热效果进行适当的热管理,以及通过优化光栅周期以包括热量问题来进一步改善已证明的绿色功率。

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