强激光与粒子束, 2011, 23 (10): 2565, 网络出版: 2011-11-18
200 mJ光泵浦氨气太赫兹激光器
200 mJ optically pumped ammonia terahertz laser
光泵浦太赫兹激光器 TEA CO2 激光器 氨气 透射成像 optically pumped terahertz laser TEA CO2 laser ammonia transmission imaging
摘要
利用光栅选支调谐的TEA CO2激光器作为泵浦源设计了高能量脉冲光泵浦太赫兹激光器。太赫兹激光谐振腔由2 m长的石英玻璃管、GaAs泵浦光输入窗和SiO2太赫兹光输出窗组成,氨气充入谐振腔内作为增益介质。太赫兹激光的波长由自主设计的金属线栅F-P干涉仪测量。实验中在多个波长处都获得了强烈的太赫兹光输出,其中151.5 μm太赫兹光的输出脉冲能量高达204 mJ,对应的泵浦光能量为32 J。最后,还给出了利用151.5 μm太赫兹光进行透视成像的实验结果。
Abstract
An optically pumped pulsed terahertz laser is presented. The pump laser is a line-tunable TEA CO2 laser. The terahertz cavity consists of a 2 m-long quartz glass tube, a GaAs input coupler and a SiO2 output coupler, and is filled with ammonia gas as terahertz active medium. Intense terahertz radiation is emitted at different wavelengths from the terahertz laser. The terahertz wavelengths are measured by a Fabry-Perot interferometer which is composed of two metal grids. As high as 204 mJ pulse energy is obtained at 151.5 μm wavelength when the cavity is pumped by a 32 J CO2 laser. The terahertz laser is applied in transmission imaging, and some preliminary imaging results are presented.
苗亮, 左都罗, 纠智先, 程祖海. 200 mJ光泵浦氨气太赫兹激光器[J]. 强激光与粒子束, 2011, 23(10): 2565. Miao Liang, Zuo Duluo, Jiu Zhixian, Cheng Zuhai. 200 mJ optically pumped ammonia terahertz laser[J]. High Power Laser and Particle Beams, 2011, 23(10): 2565.