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Simple, high-performance type II beta-BaB2O4 optical parametric oscillator

机译:简单,高性能的II型beta-BaB2O4光学参量振荡器

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A visibleear-IR optical parametric oscillator (OPO) based on type II phase matching in beta-BaB2O4 (BBO) is described. Pumped at 355 nm, this OPO covers 410-2500 nm completely with a single set of standard Nd:YAG cavity optics. The output efficiency is >25%, the linewidth of the OPO is narrower than 1-2 cm(-1) without the use of gratings or etalons, and the signal-beam divergence is <400 mu rad. Three type I BBO doubling crystals are used to extend the tuning range from 208 to 415 nm. Doubling efficiencies as high as 40% are easily obtained. The reasons for the high doubling and overall system efficiency are discussed. (C) 1997 Optical Society of America.
机译:描述了基于β-BaB2O4(BBO)中II型相位匹配的可见/近红外光学参量振荡器(OPO)。该OPO泵浦波长为355 nm,可通过一套标准的Nd:YAG腔光学元件完全覆盖410-2500 nm。在不使用光栅或标准具的情况下,输出效率> 25%,OPO的线宽比1-2 cm(-1)窄,并且信号束发散度小于400μrad。三种I型BBO双倍晶体用于将调谐范围从208 nm扩展到415 nm。轻松获得高达40%的加倍效率。讨论了倍增和整体系统效率高的原因。 (C)1997年美国眼镜学会。

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