A high power, high-conversion-efficiency, and tunable continuous-wave external cavity pump singly resonant optical parametric oscillator (OPO) was proposed in this article. This OPO was based on multi-grating MgO-doped stoichiometric periodically poled LiTaO₃ (MgO:sPPLT) and pumped with 532 nm continuous wave fiber laser. The MgO:sPPLT-OPO could provide near-infrared radiation across 821–879 nm in the signal and 1352–1515 nm in the idler within four grating periods of 8.3–8.6 μm. When the pump power was 5.4 W, the maximum pump-to-signal conversion efficiency could reach 57.5% at 821 nm. The output power extended to 5.9 W in each period when the pump power reaches 13.6 W.

中文翻译：

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基于 MgO:sPPLT 晶体的高功率连续波光学参量振荡器

本文提出了一种高功率、高转换效率、可调谐连续波外腔泵浦单谐振光参量振荡器(OPO)。该 OPO 基于多光栅掺杂 MgO 的化学计量周期性极化 LiTaO ₃ (MgO:sPPLT)，并用 532 nm 连续波光纤激光器泵浦。MgO:sPPLT-OPO 可以在 8.3-8.6 μm 的四个光栅周期内提供信号中 821-879 nm 和惰轮中 1352-1515 nm 的近红外辐射。当泵浦功率为 5.4 W 时，821 nm 处的最大泵浦信号转换效率可达到 57.5%。当泵浦功率达到 13.6 W 时，每个周期的输出功率扩展到 5.9 W。