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首页> 外文期刊>Optik: Zeitschrift fur Licht- und Elektronenoptik: = Journal for Light-and Electronoptic >High-power tunable terahertz generation from a surface-emitted THz-wave parametric oscillator based on two MgO:LiNbO_3 crystals
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High-power tunable terahertz generation from a surface-emitted THz-wave parametric oscillator based on two MgO:LiNbO_3 crystals

机译：基于两个MgO：LiNbO_3晶体的表面发射THz波参量振荡器产生的高功率可调谐太赫兹

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摘要

A high-powered tunable terahertz wave (THz-wave) has been parametrically generated via a surface-emitted THz-wave parametric oscillator (TPO) pumped by a multi-longitudinal-mode Q-switched Nd:YAG laser. The effective parametric gain length was enlarged by employing two MgO:LiNbO_3 crystals. The tunable THz-wave radiation from 0.8 to 2.8 THz was realized via varying phase-matching angle between the pump wave and the Stokes wave. The maximum THz-wave radiation was 173.9 nJ/pulse at 1.7 THz as the pump energy was 82 mJ, corresponding to an energy conversion efficiency of about 2.12 × 10~(-6) and a photon conversion efficiency of about 0.035%. The first-order, the second-order and the third-order Stokes waves were observed during the experiments.
机译：通过多纵模调Q开关Nd：YAG激光器泵浦的表面发射THz波参量振荡器（TPO），已通过参量产生了大功率可调谐太赫兹波（THz-wave）。通过使用两个MgO：LiNbO_3晶体来扩大有效参数增益长度。通过改变泵浦波和斯托克斯波之间的相位匹配角，可实现0.8至2.8 THz的可调THz波辐射。当泵浦能量为82 mJ时，在1.7 THz时最大THz波辐射为173.9 nJ /脉冲，对应于约2.12×10〜（-6）的能量转换效率和约0.035％的光子转换效率。在实验过程中观察到了一阶，二阶和三阶斯托克斯波。

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