This paper reports an intracavity terahertz parametric source based on the stimulated polariton scattering in RbTiOPO4 crystal with a high repetition rate and a high average power. The side pumping for the gain medium by laser diodes is adopted to get a higher fundamental power and a larger fundamental laser beam size than those in the diode-end-pumping in order to improve the THz output power. A non-collinear convex-plane fundamental cavity is adopted so that the thermal effect can be offset in some degree and the fundamental beam size is further increased. The obtained maximum average THz output power is 367 μW at 3.88 THz when the diode pump power is 105 W and the pulse repetition frequency (PRF) is 7 kHz. The terahertz power of 367 μW is the highest ever obtained in SPS sources.

中文翻译：

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基于RbTiOPO4晶体受激极化子散射的高平均功率二极管侧泵浦腔内太赫兹参量源

本文报道了一种基于 RbTiOPO4 晶体中受激极化子散射的腔内太赫兹参量源，具有高重复率和高平均功率。采用激光二极管对增益介质进行侧泵浦，以获得比二极管端泵浦更高的基波功率和更大的基波激光束尺寸，以提高太赫兹输出功率。采用不共线的凸面基腔，可以在一定程度上抵消热效应，进一步增大基波束尺寸。当二极管泵浦功率为 105 W 且脉冲重复频率 (PRF) 为 7 kHz 时，在 3.88 THz 处获得的最大平均 THz 输出功率为 367 μW。367 μW 的太赫兹功率是 SPS 光源中最高的。