摘要
基于LiNbO3晶体垂直表面输出技术,设计了一台小型化外腔THz参量振荡器。利用小型化灯1064nm脉冲激光器泵浦MgO:LiNbO3,通过优化设计三波非共线相位匹配的光学参量振荡腔结构,实现THz垂直晶体表面输出,减少LiNbO3晶体对THz波的吸收,提高了THz波输出光束质量。当在泵浦光能量为128mJ、重复频率为10Hz时,获得THz波的调谐范围为0.69～3.01THz,在1.6THz处获得THz波最大平均功率为10.8μW,脉冲宽度为10ns,对应THz波能量转换效率为8.43×10-6。
A miniature extracavity terahertz（THz） parametric oscillator is proposed based on surface-emitted technology. Using a small sized pulsed laser to pump MgO：LiNbO3 crystal, the THz-wave is emitted perpendicularly to the crystal surface by optimization design of three-wave non-collinear phase-matching optical parametric oscillation structure. This configuration can reduce the absorption of the THz-wave and improve the beam quality. The THz-wave can be tuned from 0.69 THz to 3.01 THz. When the pump energy is 128 mJ, the maximum average power of the THz-wave is 10.8 μW at 1.6 THz , corresponding to an energy conversion efficiency of 8.43×10-6. This room-temperature-operated, miniature system is suited to a variety of applications such as spectral analysis and THz communications.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第6期1465-1468,共4页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目
国家自然科学基金项目(61172010
61101058
61107086)
关键词
光学太赫兹
光学参量振荡
可调谐
表面垂直输出
optical terahertz, optical parametric oscillator, tunable, surface emitted
