标题：Terahertz parametric oscillator with the surface-emitted configuration in RbTiOPO4 crystal
作者：Gao, Feilong; Zhang, Xingyu; Cong, Zhenhua; Qin, Zengguang; Chen, Xiaohan; Liu, Zhaojun; Lu, Jianren; Li, Yuan; Zang, Jie; Wu, Dong; 更多 作者机构：[Gao, Feilong; Zhang, Xingyu; Cong, Zhenhua; Qin, Zengguang; Chen, Xiaohan; Liu, Zhaojun; Lu, Jianren; Li, Yuan; Zang, Jie; Wu, Dong; Jia, Chenyang; J 更多
通讯作者：Zhang, XY;Zhang, XY
通讯作者地址：[Zhang, XY]Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Shandong, Peoples R China;[Zhang, XY]Shandong Univ, Shandong Prov Key Lab Laser Techn 更多
来源：OPTICS AND LASER TECHNOLOGY
关键词：Terahertz parametric oscillator; Stimulated polariton scattering;; RbTiOPO4 crystal
摘要：Terahertz parametric oscillator based on RbTiOPO4 (RTP) crystal utilizing the surface-emitted configuration under high pumping pulse energy and low pulse repetition rate is investigated. The obtained THz wave was discontinuously tuned from 3.01 to 3.09 THz, from 3.53 to 4.17 THz, from 4.54 to 4.66 THz, and from 5.35 to 5.89 THz, respectively. The maximum output THz wave pulse energy was 1.77 mu J at 3.85 THz. It was obtained when the pumping pulse energy was 120 mJ and the pumping beam diameter was 3.0 mm. The polarization of THz wave was along the z axis of the RTP crystal. The THz beam on its output surface was approximately elliptical with a major axis of 6.5 mm and a minor axis of 3.5 mm. The divergence angles were 2.45 degrees in the horizontal direction, and 3.88 degrees in the vertical direction. (C) 2018 Elsevier Ltd. All rights reserved.