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3 November 2016 THz wave parametric oscillator with a surface-emitted ring-cavity configuration
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A surface-emitted ring-cavity terahertz (THz) wave parametric oscillator has been demonstrated for high-energy THz output and fast frequency tuning. Through the special optical design with a Galvano optical scanner and four-mirror ring-cavity structure, a maximum THz output of 12.9 μJ/pulse is achieved at 1.359 THz under the pump pulse energy of 172.8 mJ with the repetition rate of 10 Hz. A further research on the performance of the SE ring-cavity TPO has done to explore more characteristics of THz output. The THz pulse instability and the influence of cavity loss has analyzed. Moreover, the pump depletion rate of the ring-cavity configuration is much lower than the conventional surface-emitted terahertz wave parametric oscillator at the same experimental conditions.
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Zhen Yang, Yuye Wang, Degang Xu, Longhuang Tang, Wentao Xu, Pan Duan, Chao Yan, and Jianquan Yao "THz wave parametric oscillator with a surface-emitted ring-cavity configuration", Proc. SPIE 10030, Infrared, Millimeter-Wave, and Terahertz Technologies IV, 100300C (3 November 2016);

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