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

被引：4
作者：
Li DeHua [1 ]
Qi XiaoDong [2 ]
Liu ShengGang [3 ]
机构：
[1] Shandong Univ Sci & Technol, Terahertz Inst, Qingdao 266510, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China
[3] Univ Elect Sci & Technol China, Phys Elect Coll, Terahertz Res Ctr, Chengdu 610054, Peoples R China
来源：
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES | 2008年 / 51卷 / 12期
关键词：
optical rectification; periodically inverted; effective length; conversion efficiency;
D O I：
10.1007/s11431-008-0309-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
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 l (c), 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 neglected. Taking account of the absorption of crystals, effective length of crystal is L (eff)=0.63/alpha, there is no apparent increase of conversion efficiency and the conversion efficiency approaches to a constant eventually when the crystal length is increased.
引用
收藏
页码：2080 / 2088
页数：9
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