Author Affiliations
Abstract
1 Laboratory of Terahertz Solid-state Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
A real-time imaging system based on a compact terahertz laser is constructed by employing one off-axis parabolic mirror and one silicon lens. Terahertz imaging of water, water stains, leaf veins, human hairs, and metal wire is demonstrated. An imaging resolution of 68 µm is achieved. The experiments show that this compact and simplified imaging system is suitable for penetration demonstration of terahertz light, water distribution measurement, and imaging analysis of thin samples.
terahertz real-time imaging subwavelength resolution compact laser Chinese Optics Letters
2022, 20(9): 091101
华北光电技术研究所固体激光技术重点实验室， 北京 100015
报道了谐振腔长达7.5 m的紧凑型被动锁模激光器，通过谐振腔的折叠设计，整个激光器被压缩为55 cm长，15 cm宽。采用二极管端面抽运Nd:YVO4晶体，经半导体可饱和吸收镜被动锁模后激光再一次通过增益晶体放大后输出。在重复频率为20 MHz时，输出激光脉冲宽度为14.2 ps，最大输出功率6.14 W,输出激光为1064 nm的基横模(TEM00)；单脉冲能量达0.3 μJ。较长的谐振腔保证了良好的光束质量，光束质量因子M2在X方向为1.17，Y方向为1.06，功率不稳定性为0.5%。
激光器 紧凑型激光器 被动锁模激光器 半导体可饱和吸收镜 二极管端面抽运 中国激光
2013, 40(10): 1002004
