摘要
使用磷酸钛氧钾(KTiOPO4,KTP)晶体,采用斯托克斯参量振荡器与太赫兹波表面垂直出射的斯托克斯参量放大器相结合的实验方案,获得了大能量的太赫兹波输出。抽运源是调Q脉冲激光器,输出波长为1064.2nm,脉宽为7.5ns,脉冲重复频率为1Hz。斯托克斯光波长为1086.2nm,抽运光与斯托克斯光的夹角为4.4°,太赫兹波频率为5.7THz。抽运光路上的延时装置可以保证抽运光脉冲与待放大斯托克斯光脉冲有很好的时间重合性。当抽运光脉冲能量为770mJ、待放大斯托克斯光脉冲能量为16.8mJ时,放大后斯托克斯光脉冲能量为185.4mJ,太赫兹波脉冲能量最大为6.4μJ。
In this study,the high-energy terahertz-wave pulses were generated using apotassium titanyl phosphate (KTiOPO4,KTP)crystal and an experimental scheme that combines a Stokes parametric oscillator and a Stokes parametric amplifier involving the vertical surface emission of terahertz waves.The pump source was a Q-switched laser with an output wavelength of 1064.2nm,apulse width of 7.5ns,and a pulse repetition rate of 1Hz.The Stokes light wavelength is 1086.2nm,the angle between the pump and Stokes beams is 4.4°,and the terahertz wave frequency is 5.7THz.The time-delay device on the pump-light path can ensure that the pump light pulse has agood time coincidence with the Stokes light pulse to be amplified.When the pump light pulse energy is 770mJ and the Stokes light pulse energy to be amplified is 16.8mJ,the amplified Stokes light pulse energy is 185.4mJ and the maximum terahertz wave pulse energy is 6.4μJ.
作者
贾晨阳
张行愚
丛振华
秦增光
刘兆军
陈晓寒
臧婕
李圆
高飞龙
焦月
王伟涛
张少军
Jia Chenyang;Zhang Xingyu;Cong Zhenhua;Qin Zengguang;Liu Zhaojun;Chen Xiaohan;Zang Jie;Li Yuan;Gao Feilong;Jiao Yue;Wang Weitao;Zhang Shaojun(Shandong Provincial Key Laboratory of Laser Technology and Application,School of Information Science and Engineering,Shandong University,Qingdao,Shandong 266237,China;Laser Institute of Shandong Academy of Sciences,Jinan,Shandong 250014,China;State Key Laboratory of Crystal Materials,Shandong University,Jinan,Shandong 250100,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2019年第6期260-265,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(61775122,61475087,61605103)
山东省重点研发计划(2017CXGC0809,2017GGX10103)
山东省自然科学基金(ZR2014FM024)
关键词
太赫兹技术
太赫兹波
受激电磁耦子散射
磷酸钛氧钾晶体
terahertz technology
terahertz wave
stimulated polariton scattering
potassium titanyl phosphate crystal
