中国物理B ›› 2022, Vol. 31 ›› Issue (7): 74209-074209.doi: 10.1088/1674-1056/ac5243

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THz wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves

Zhongyang Li(李忠洋)1,†, Qianze Yan(颜钤泽)1, Pengxiang Liu(刘鹏翔)2, Binzhe Jiao(焦彬哲)1, Gege Zhang(张格格)1, Zhiliang Chen(陈治良)1, Pibin Bing(邴丕彬)1, Sheng Yuan(袁胜)1, Kai Zhong(钟凯)3, and Jianquan Yao(姚建铨)3   

  1. 1 College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
    2 Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China;
    3 College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China
  • 收稿日期:2021-12-01 修回日期:2022-01-24 接受日期:2022-02-07 出版日期:2022-06-09 发布日期:2022-06-09
  • 通讯作者: Zhongyang Li E-mail:thzwave@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61735010, 31671580, and 61601183), Natural Science Foundation of Henan Province, China (Grant No. 162300410190), and Program for Science &Technology Innovation Talents in Universities of Henan Province, China (Grant No. 18HASTIT023).

THz wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves

Zhongyang Li(李忠洋)1,†, Qianze Yan(颜钤泽)1, Pengxiang Liu(刘鹏翔)2, Binzhe Jiao(焦彬哲)1, Gege Zhang(张格格)1, Zhiliang Chen(陈治良)1, Pibin Bing(邴丕彬)1, Sheng Yuan(袁胜)1, Kai Zhong(钟凯)3, and Jianquan Yao(姚建铨)3   

  1. 1 College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
    2 Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China;
    3 College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China
  • Received:2021-12-01 Revised:2022-01-24 Accepted:2022-02-07 Online:2022-06-09 Published:2022-06-09
  • Contact: Zhongyang Li E-mail:thzwave@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61735010, 31671580, and 61601183), Natural Science Foundation of Henan Province, China (Grant No. 162300410190), and Program for Science &Technology Innovation Talents in Universities of Henan Province, China (Grant No. 18HASTIT023).

摘要: We propose a novel scheme for THz wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves (HSWs). The repeated frequency conversions are accomplished by oscillations of Stoke waves in resonant cavity (RC) where low-order Stokes waves (LSWs) are converted to high-order Stokes waves again and again. The continuous frequency conversions are accomplished by optimized cascaded difference frequency generation (OCDFG) where the poling periods of the optical crystal are aperiodic leading to the frequency conversions from low-order Stokes waves to high-order Stokes waves uninterruptedly and unidirectionally. Combined with the repeated and continuous frequency conversions, the optical-to-THz energy conversion efficiency (OTECE) exceeds 26% at 300 K and 43% at 100 K with pump intensities of 300 MW/cm2.

关键词: THz wave generation, optimized cascaded difference frequency generation, aperiodic periodically poled lithium niobate

Abstract: We propose a novel scheme for THz wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves (HSWs). The repeated frequency conversions are accomplished by oscillations of Stoke waves in resonant cavity (RC) where low-order Stokes waves (LSWs) are converted to high-order Stokes waves again and again. The continuous frequency conversions are accomplished by optimized cascaded difference frequency generation (OCDFG) where the poling periods of the optical crystal are aperiodic leading to the frequency conversions from low-order Stokes waves to high-order Stokes waves uninterruptedly and unidirectionally. Combined with the repeated and continuous frequency conversions, the optical-to-THz energy conversion efficiency (OTECE) exceeds 26% at 300 K and 43% at 100 K with pump intensities of 300 MW/cm2.

Key words: THz wave generation, optimized cascaded difference frequency generation, aperiodic periodically poled lithium niobate

中图分类号:  (Optical parametric oscillators and amplifiers)

  • 42.65.Yj
42.65.Dr (Stimulated Raman scattering; CARS) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)