| 周期极化GaAs晶体中差频产生太赫兹辐射的研究 |
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| 引用本文： | 张成国,姚建铨,钟凯,缪岳洋,孙崇玲,王鹏,李敬辉.周期极化GaAs晶体中差频产生太赫兹辐射的研究[J].激光与红外,2011,41(10):1154-1158. |
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| 作者姓名： | 张成国 姚建铨 钟凯 缪岳洋 孙崇玲 王鹏 李敬辉 |
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| 作者单位： | 1. 天津大学精密仪器与光电子工程学院,天津300072;光电信息技术教育部重点实验室(天津大学),天津300072
2. 天津大学仁爱学院计算机科学与技术系,天津,301636 |
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| 基金项目： | 国家自然科学基金项目（No.61101058）资助；国家重点基础研究发展计划“973”项目（No.2007CB310403)资助 |
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| 摘 要： | 传统的光学差频产生的太赫兹辐射转换效率低，不能获得高功率太赫兹辐射。本文对周期极化GaAs晶体中差频产生太赫兹辐射进行了理论计算，通过温度调谐实现了周期极化GaAs晶体中差频获得可调谐太赫兹波的输出。为了提高差频过程的增益和量子效率，在准相位匹配基础上引进了级联差频机理，并对最佳晶体长度和最佳泵浦频率进行了计算。结果表明，利用周期极化的GaAs晶体可以获得更高能量更高效率的太赫兹波辐射。
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| 关 键 词： | GaAs晶体 准相位匹配 温度调谐 级联差频 太赫兹 |
Terahertz sources based on difference frequency generation in quasi-phase-matched GaAs |
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| ZHANG Cheng-guo,YAO Jian-quan,ZHONG Kai,MIAO Yue-yang,SUN Chong-ling,WANG Peng,LI Jing-hui.Terahertz sources based on difference frequency generation in quasi-phase-matched GaAs[J].Laser & Infrared,2011,41(10):1154-1158. |
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| Authors: | ZHANG Cheng-guo YAO Jian-quan ZHONG Kai MIAO Yue-yang SUN Chong-ling WANG Peng LI Jing-hui |
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| Affiliation: | ZHANG Cheng-guo1,2,YAO Jian-quan1,ZHONG Kai1,MIAO Yue-yang1,SUN Chong-ling1,2 WANG Peng1,LI Jing-hui3(1.College of Precision Instrument and Optoelectronic Engineering,Tianjin University,Tianjin 300072,China,2.Key Laboratory of Opto-electronics Information Technology(Tianjin University),Ministry of Education,3.College of Ren Ai,Department of Computer Science and Technology,Tianjin 301636,China) |
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| Abstract: | The traditional method of optical difference frequency THz radiation with low conversion efficiency can not get high power THz output.In this paper,DFG THz radiation is calculated in quasi-phase-matched(QPM)GaAs.Tunable THz wave is obtained from QPM GaAs crystals using the temperature tuning method.In order to improve the gain of DFG and quantum efficiency,the mechanism of cascaded difference frequency is introduced,and the optimum crystal length and the pump frequency are calculated.It is obviously seen fr... |
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| Keywords: | gallium arsenide quasi-phase-matched(QPM) cascaded difference frequency temperature tuning terahertz(THz) |
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