High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser

doi:10.1088/1674-1056/ac2d20

中国物理B ›› 2022, Vol. 31 ›› Issue (2): 24204-024204.doi: 10.1088/1674-1056/ac2d20

High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser

Yuye Wang(王与烨)^1,2, Gang Nie(聂港)^1,2, Changhao Hu(胡常灏)^1,2, Kai Chen(陈锴)^1,2, Chao Yan(闫超)^1,2, Bin Wu(吴斌)³, Junfeng Zhu(朱军峰)³, Degang Xu(徐德刚)^1,2,†, and Jianquan Yao(姚建铨)^1,2

1 Institute of Laser and Optoelectronics, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China;
2 Key Laboratory of Optoelectronic Information Technology(Ministry of Education), Tianjin University, Tianjin 300072, China;
3 Science and Technology on Electronic Test & Measurement Laboratory, Qingdao 266555, China

收稿日期:2021-08-18 修回日期:2021-09-16 接受日期:2021-10-06 出版日期:2022-01-13 发布日期:2022-01-25
通讯作者: Degang Xu E-mail:xudegang@tju.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. U1837202, 61775160, 61771332, 62011540006, and 62175182).

High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser

1 Institute of Laser and Optoelectronics, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China;
2 Key Laboratory of Optoelectronic Information Technology(Ministry of Education), Tianjin University, Tianjin 300072, China;
3 Science and Technology on Electronic Test & Measurement Laboratory, Qingdao 266555, China

Received:2021-08-18 Revised:2021-09-16 Accepted:2021-10-06 Online:2022-01-13 Published:2022-01-25
Contact: Degang Xu E-mail:xudegang@tju.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. U1837202, 61775160, 61771332, 62011540006, and 62175182).

摘要/Abstract

摘要： A high-sensitive terahertz detector operating at room temperature was demonstrated based on parametric up-conversion. A nanosecond 1064-nm Nd:YAG laser was used to pump the parametric up-conversion detector and the up-conversion from terahertz wave to NIR laser was realized in a lithium niobate crystal. The minimum detectable terahertz energy of 9 pJ was realized with the detection dynamic range of 54 dB, 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.

关键词: terahertz wave, high-sensitive detection, room temperature operation, parametric up-conversion

Abstract: A high-sensitive terahertz detector operating at room temperature was demonstrated based on parametric up-conversion. A nanosecond 1064-nm Nd:YAG laser was used to pump the parametric up-conversion detector and the up-conversion from terahertz wave to NIR laser was realized in a lithium niobate crystal. The minimum detectable terahertz energy of 9 pJ was realized with the detection dynamic range of 54 dB, 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.

Key words: terahertz wave, high-sensitive detection, room temperature operation, parametric up-conversion

中图分类号: (Stimulated Raman scattering; CARS)

42.65.Dr

42.65.-k (Nonlinear optics) 42.60.-v (Laser optical systems: design and operation)

Yuye Wang(王与烨), Gang Nie(聂港), Changhao Hu(胡常灏), Kai Chen(陈锴), Chao Yan(闫超), Bin Wu(吴斌), Junfeng Zhu(朱军峰), Degang Xu(徐德刚), and Jianquan Yao(姚建铨). High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser[J]. 中国物理B, 2022, 31(2): 24204-024204.

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High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser

High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser

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