中国物理B ›› 2023, Vol. 32 ›› Issue (11): 114210-114210.doi: 10.1088/1674-1056/acc2b0

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Terahertz shaping technology based on coherent beam combining

Xiao-Ran Zheng(郑晓冉)1, Dan-Ni Ma(马丹妮)2, Guang-Tong Jiang(蒋广通)3,†, Cun-Lin Zhang(张存林)1, and Liang-Liang Zhang(张亮亮)1,‡   

  1. 1 Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, and Beijing Advanced Innovation Center for Imaging Technology, Department of Physics, Capital Normal University, Beijing 100048, China;
    2 Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China;
    3 Laser Industries Research Academy-Beijing, Hubei Huazhong Changjiang Photoelectric Science and Technology Ltd, Beijing 102209, China
  • 收稿日期:2022-12-30 修回日期:2023-03-04 接受日期:2023-03-09 出版日期:2023-10-16 发布日期:2023-10-31
  • 通讯作者: Guang-Tong Jiang, Liang-Liang Zhang E-mail:jgtop@qq.com;zhlliang@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074272 and 61905271), the National Defense Science and Technology Innovation Special Zone Project of China (Grant No. 20-163-02-ZT-008-009-01) and Guangdong Basic and Applied Basic Research Foundation (Grant No. 2020A1515011083).

Terahertz shaping technology based on coherent beam combining

Xiao-Ran Zheng(郑晓冉)1, Dan-Ni Ma(马丹妮)2, Guang-Tong Jiang(蒋广通)3,†, Cun-Lin Zhang(张存林)1, and Liang-Liang Zhang(张亮亮)1,‡   

  1. 1 Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, and Beijing Advanced Innovation Center for Imaging Technology, Department of Physics, Capital Normal University, Beijing 100048, China;
    2 Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China;
    3 Laser Industries Research Academy-Beijing, Hubei Huazhong Changjiang Photoelectric Science and Technology Ltd, Beijing 102209, China
  • Received:2022-12-30 Revised:2023-03-04 Accepted:2023-03-09 Online:2023-10-16 Published:2023-10-31
  • Contact: Guang-Tong Jiang, Liang-Liang Zhang E-mail:jgtop@qq.com;zhlliang@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074272 and 61905271), the National Defense Science and Technology Innovation Special Zone Project of China (Grant No. 20-163-02-ZT-008-009-01) and Guangdong Basic and Applied Basic Research Foundation (Grant No. 2020A1515011083).

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摘要： The generation of terahertz (THz) waves by focusing a femtosecond pulsed laser beam at a distance is able to overcome the strong absorption properties of air and has rapidly attracted the attention of industry. However, the poor directionality of the THz wave radiation generated by this method is not conducive to THz wave applications. By controlling the morphology of the ultrafast laser-excited plasma filament and its electron density distribution through coherent beam combining technology, we achieve direct THz beam shaping and are able to obtain THz wave radiation of Gaussian or arbitrary transverse distribution. The novel experimental approach proposed in this paper opens up the research field of direct THz wave shaping using plasma. Moreover, it innovates multi-parameter convergence algorithms and, by doing so, has the potential to find beam patterns with higher energy conversion efficiency and break the energy limit of THz waves emitted by lasers at high power.

关键词: femtosecond pulsed laser, coherent beam combining, terahertz wave, beam shaping, plasma

Abstract: The generation of terahertz (THz) waves by focusing a femtosecond pulsed laser beam at a distance is able to overcome the strong absorption properties of air and has rapidly attracted the attention of industry. However, the poor directionality of the THz wave radiation generated by this method is not conducive to THz wave applications. By controlling the morphology of the ultrafast laser-excited plasma filament and its electron density distribution through coherent beam combining technology, we achieve direct THz beam shaping and are able to obtain THz wave radiation of Gaussian or arbitrary transverse distribution. The novel experimental approach proposed in this paper opens up the research field of direct THz wave shaping using plasma. Moreover, it innovates multi-parameter convergence algorithms and, by doing so, has the potential to find beam patterns with higher energy conversion efficiency and break the energy limit of THz waves emitted by lasers at high power.

Key words: femtosecond pulsed laser, coherent beam combining, terahertz wave, beam shaping, plasma

中图分类号:  (Wave propagation, transmission and absorption)

  • 42.25.Bs
42.25.Kb (Coherence) 52.38.-r (Laser-plasma interactions)