Study on the generation of high-power terahertz wave from surface-emitted THz-wave parametric oscillator with MgO:LiNbO3 crystal

被引：1
|
作者：
Li, Zhongyang [1 ]
Yao, Jianquan [1 ]
Xu, Degang [1 ]
Zhong, Kai [1 ]
Bing, Pibin [1 ]
Wang, Jingli [1 ]
机构：
[1] Tianjin Univ, Inst Laser & Optoelect, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China
来源：
INFRARED, MILLIMETER WAVE, AND TERAHERTZ TECHNOLOGIES | 2010年 / 7854卷
关键词：
terahertz-wave parametric oscillator; noncollinear phase matching; frequency tuning output; LINEWIDTH;
D O I：
10.1117/12.868880
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
High-power nanosecond pulsed THz-wave radiation was achieved via a surface-emitted THz-wave parametric oscillator (TPO). The effective parametric gain length under the condition of noncollinear phase matching was calculated to optimize the parameters of the TPO. Only one MgO:LiNbO(3) crystal with large volume was used as gain medium. THz-wave radiation from 0.8 to 2.9 THz was obtained. The maximum THz-wave output was 289.9 nJ/pulse at 1.94 THz when pump power density was 211 MW/cm(2), corresponding to the energy conversion efficiency of 3.43x10(-6) and the photon conversion efficiency of about 0.05%. The far-field divergence angle of THz-wave radiation was 0.0204 rad at vertical direction and 0.0068 rad at horizontal direction.
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页数：9
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