摘要
A high-sensitive terahertz detector operating at room temperature was demonstrated based on parametric upconversion.A nanosecond 1064-nm Nd:YAG laser was used to pump the parametric up-conversion detector and the upconversion from terahertz wave to NIR laser was realized in a lithium niobate crystal.The minimum detectable terahertz energy of 9 p J was realized with the detection dynamic range of 54 d B,which was three orders of magnitude higher than that of commercial Golay cell.The detectable terahertz frequency range of the detection system was 0.90 Thz–1.83 THz.Besides,the effects of pump energy and effective gain length on the detection sensitivity were studied in experiment.The results showed that higher pump energy and longer effective gain length are helpful for improving the detection sensitivity of parametric up-conversion detector.
作者
王与烨
聂港
胡常灏
陈锴
闫超
吴斌
朱军峰
徐德刚
姚建铨
Yuye Wang;Gang Nie;Changhao Hu;Kai Chen;Chao Yan;Bin Wu;Junfeng Zhu;Degang Xu;Jianquan Yao(Institute of Laser and Optoelectronics,School of Precision Instruments and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Optoelectronic Information Technology(Ministry of Education),Tianjin University,Tianjin 300072,China;Science and Technology on Electronic Test&Measurement Laboratory,Qingdao 266555,China)
基金
supported by the National Natural Science Foundation of China(Grant Nos.U1837202,61775160,61771332,62011540006,and 62175182)。
