中国物理B ›› 2024, Vol. 33 ›› Issue (8): 84203-084203.doi: 10.1088/1674-1056/ad47b0

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Enhanced picosecond terahertz wave generation based on cascade effects in a terahertz parametric generator

Jingxi Zhang(张敬喜)1,2, Yuye Wang(王与烨)1,2,†, Bingfeng Xu(徐炳烽)1,2, Kai Chen(陈锴)1,2, Zikun Liu(刘紫鲲)1,2, Hongru Ma(马鸿儒)1,2, Degang Xu(徐德刚)1,2, and Jianquan Yao(姚建铨)1,2   

  1. 1 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
  • 收稿日期:2024-03-15 修回日期:2024-04-22 出版日期:2024-08-15 发布日期:2024-07-15
  • 通讯作者: Yuye Wang E-mail:yuyewang@tju.edu.cn
  • 基金资助:
    This research was funded by the National Natural Science Foundation of China (Grant Nos. U22A20353, U22A20123, 62175182, and 62275193).

Enhanced picosecond terahertz wave generation based on cascade effects in a terahertz parametric generator

Jingxi Zhang(张敬喜)1,2, Yuye Wang(王与烨)1,2,†, Bingfeng Xu(徐炳烽)1,2, Kai Chen(陈锴)1,2, Zikun Liu(刘紫鲲)1,2, Hongru Ma(马鸿儒)1,2, Degang Xu(徐德刚)1,2, and Jianquan Yao(姚建铨)1,2   

  1. 1 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
  • Received:2024-03-15 Revised:2024-04-22 Online:2024-08-15 Published:2024-07-15
  • Contact: Yuye Wang E-mail:yuyewang@tju.edu.cn
  • Supported by:
    This research was funded by the National Natural Science Foundation of China (Grant Nos. U22A20353, U22A20123, 62175182, and 62275193).

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摘要： Enhanced terahertz wave generation via a Stokes cascade process has been demonstrated using picosecond pulse pumped terahertz parametric generation at 1 kHz repetition rate. Clear cascade saturation of terahertz output was observed, and the corresponding cascade-Stokes spectra were analyzed. The maximum terahertz wave average power was 22 μW under a pump power of 30 W, whereas the maximum power conversion efficiency was 8$\times10^{-7}$ under a pump power of 21 W. The THz power fluctuation was measured to be about 1% in 20 min. This THz parametric source with a relatively stable output is suitable for a variety of practical applications.

关键词: terahertz parametric generation, stimulated polariton, cascade effect, CLN crystal

Abstract: Enhanced terahertz wave generation via a Stokes cascade process has been demonstrated using picosecond pulse pumped terahertz parametric generation at 1 kHz repetition rate. Clear cascade saturation of terahertz output was observed, and the corresponding cascade-Stokes spectra were analyzed. The maximum terahertz wave average power was 22 μW under a pump power of 30 W, whereas the maximum power conversion efficiency was 8$\times10^{-7}$ under a pump power of 21 W. The THz power fluctuation was measured to be about 1% in 20 min. This THz parametric source with a relatively stable output is suitable for a variety of practical applications.

Key words: terahertz parametric generation, stimulated polariton, cascade effect, CLN crystal

中图分类号:  (Laser optical systems: design and operation)

  • 42.60.-v
42.65.-k (Nonlinear optics) 42.65.Dr (Stimulated Raman scattering; CARS)