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

作　　者：Zhongyang Li Qianze Yan Pengxiang Liu Binzhe Jiao Gege Zhang Zhiliang Chen Pibin Bing Sheng Yuan Kai Zhong Jianquan Yao 李忠洋;颜钤泽;刘鹏翔;焦彬哲;张格格;陈治良;邴丕彬;袁胜;钟凯;姚建铨(College of Electric Power,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;College of Precision Instrument and Opto-electronics Engineering,Institute of Laser and Opto-electronics,Tianjin University,Tianjin 300072,China)

机构地区：[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

出　　处：《Chinese Physics B》2022年第7期343-348,共6页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.61735010,31671580,and 61601183);Natural Science Foundation of Henan Province,China(Grant No.162300410190);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/cm^(2).

关 键 词：THz wave generation optimized cascaded difference frequency generation aperiodic periodically poled lithium niobate 

分 类 号：O441.4[理学—电磁学]