中国物理B ›› 2011, Vol. 20 ›› Issue (5): 54207-054207.doi: 10.1088/1674-1056/20/5/054207

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High-power terahertz radiation from surface-emitted THz-wave parametric oscillator

李忠洋, 姚建铨, 徐德刚, 钟凯, 汪静丽, 邴丕彬   

  1. College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China;Key Laboratory of Opto-electronics Information Science and Technology of Ministry of Education, Tianjin University, Tianjin 300072, China
  • 收稿日期:2010-11-18 修回日期:2011-01-17 出版日期:2011-05-15 发布日期:2011-05-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2007CB310403), the National Natural Science Foundation of China (Grant No. 60801017), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070

High-power terahertz radiation from surface-emitted THz-wave parametric oscillator

Li Zhong-Yang(李忠洋)a)b)†, Yao Jian-Quan(姚建铨)a)b), Xu De-Gang(徐德刚) a)b), Zhong Kai(钟凯)a)b), Wang Jing-Li(汪静丽) a)b), and Bing Pi-Bin(邴丕彬)a)b)   

  1. a College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China; b Key Laboratory of Opto-electronics Information Science and Technology of Ministry of Education, Tianjin University, Tianjin 300072, China
  • Received:2010-11-18 Revised:2011-01-17 Online:2011-05-15 Published:2011-05-15
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2007CB310403), the National Natural Science Foundation of China (Grant No. 60801017), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070420118).

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摘要： We report a pulsed surface-emitted THz-wave parametric oscillator based on two MgO:LiNbO3 crystals pumped by a multi-longitudinal mode Q-switched Nd:YAG laser. Through varying the phase matching angle, the tunable THz-wave output from 0.79 THz to 2.84 THz is realized. The maximum THz-wave output was 193.2 nJ/pulse at 1.84 THz as the pump power density was 212.5 MW/cm2, corresponding to the energy conversion efficiency of 2.42×10-6 and the photon conversion efficiency of about 0.037%. When the pump power density changed from 123 MW/cm2 to 148 MW/cm2 and 164 MW/cm2, the maximum output of the THz-wave moved to the high frequency band. We give a reasonable explanation for this phenomenon.

关键词: THz-wave parametric oscillator, noncollinear phase matching, THz-wave polarization, frequency tunable output

Abstract: We report a pulsed surface-emitted THz-wave parametric oscillator based on two MgO:LiNbO3 crystals pumped by a multi-longitudinal mode Q-switched Nd:YAG laser. Through varying the phase matching angle, the tunable THz-wave output from 0.79 THz to 2.84 THz is realized. The maximum THz-wave output was 193.2 nJ/pulse at 1.84 THz as the pump power density was 212.5 MW/cm2, corresponding to the energy conversion efficiency of 2.42×10-6 and the photon conversion efficiency of about 0.037%. When the pump power density changed from 123 MW/cm2 to 148 MW/cm2 and 164 MW/cm2, the maximum output of the THz-wave moved to the high frequency band. We give a reasonable explanation for this phenomenon.

Key words: THz-wave parametric oscillator, noncollinear phase matching, THz-wave polarization, frequency tunable output

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)