High-average and high-peak output-power terahertz-wave generation by optical parametric down-conversion in MgO:LiNbO3
High-average and high-peak output-power terahertz-wave generation by optical parametric down-conversion in MgO:LiNbO3
复制标题
DOI：
10.1063/1.5046126
复制
发表时间：
2018-09-17
影响因子：
4
通讯作者：
Minamide, Hiroaki
中科院分区：
文献类型：
--
作者：
Moriguchi, Yoshikiyo;Tokizane, Yu;Minamide, Hiroaki
采用MgO：LiNbO 3晶体，通过注入种子技术实现了太赫兹波的参量产生（is-TPG），实现了高重复频率、窄线宽的宽调谐太赫兹波。用脉宽为140 ps、平均功率为5 W的被动调Q掺钕钒酸钇微片激光器泵浦晶体，获得了平均输出功率为30 μ zW、峰值功率为4 W、脉宽为73 ps、脉冲重复频率为100 kHz的太赫兹波输出。为了防止激光对晶体的损伤和光折变损伤，通过改变泵浦参数，对MgO：LiNbO 3晶体的泵浦条件进行了实验研究。结果，我们实现了在100 kHz范围内稳定产生太赫兹波信号。此外，我们进行了太赫兹波成像使用开发的is-TPG源。所获得的太赫兹图像表明，开发的系统具有良好的稳定性，在很长一段时间。(C)2018年作者。
A widely tunable terahertz (THz)-wave generation that has a high repetition rate and a narrow line width is demonstrated in this paper by injection-seeded THz-wave parametric generation (is-TPG) in a MgO:LiNbO3 crystal. By pumping the crystal using a passively Q-switched neodymium-doped yttrium vanadate microchip laser with a time duration of 140 ps and an average power of up to 5 W, a THz-wave output with an average output power of 30 mu zW, a peak power of 4W, a pulse duration of 73 ps, and a pulse-repetition frequency of 100 kHz is obtained. To prevent laser damage and photorefractive damage to the crystal, the constraints on the pumping condition of the MgO:LiNbO3 crystal are experimentally studied by changing the pumping parameters. As a result, we achieved the stable generation of the THz-wave signal in the 100 kHz regime. Moreover, we performed THz-wave imaging by using the developed is-TPG source. The obtained THz image indicated that the developed system has a good stability over long periods of time. (C) 2018 Author(s).