A theoretical analysis of optical-to-THz conversion efficiency via optical rectification

作     者：LI DeHua1,QI XiaoDong2 & LIU ShengGang3 1 Terahertz Institute of Shandong University of Science & Technology,Qingdao 266510,China 2 Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China 3 Terahertz research center,Physical Electronics College,University of Electronics Science,Chengdu 610054,China 

作者机构：Terahertz Institute of Shandong University of Science & Technology Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Terahertz research center Physical Electronics College University of Electronics Science 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2008年第51卷第12期

页      面：2080-2088页

核心收录：

学科分类：0810[工学-信息与通信工程] 070207[理学-光学] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：optical rectification periodically inverted effective length conversion efficiency 

摘      要：A theoretical analysis of an ultra-short pulse converted to Terahertz radiation via optical rectification in nonlinear optical crystal is presented here;several factors that affect optical-to-THz conversion efficiencies are discussed;pulse durations affect the conversion efficiency effectively:when crystal length is equal to the optimal crystal length lc,optical-to-THz conversion efficiency is the highest,but for the periodically-inverted electro-optic crystals,conversion efficiency is almost proportional to the crystal length when absorption can be *** account of the absorption of crystals,effective length of crystal is Leff=0.63/α,there is no apparent increase of conversion efficiency and the conversion efficiency approaches to a constant eventually when the crystal length is increased.