| TEA CO2激光在AgGaSe2晶体中的倍频实验研究 |
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| 引用本文： | 黄金哲,任德明,张莉莉,王宇虹,曲彦臣,胡孝勇.TEA CO2激光在AgGaSe2晶体中的倍频实验研究[J].中国激光,2004,31(5):559-562. |
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| 作者姓名： | 黄金哲 任德明 张莉莉 王宇虹 曲彦臣 胡孝勇 |
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| 作者单位： | 1. 哈尔滨工业大学光电子技术研究所,黑龙江,哈尔滨,150001;哈尔滨理工大学西区电子科学与技术系,黑龙江,哈尔滨,150080
2. 哈尔滨工业大学光电子技术研究所,黑龙江,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金 (编号 :6 9870 0 5 )资助项目 |
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| 摘 要： | 实验上实现了TEACO2 激光在AgGaSe2 非线性光学晶体中的倍频光产生。着重研究了TEACO2 激光的能量、脉冲重复频率以及基波的焦点位置对于倍频光输出的影响。实验中得到了倍频光的角度调谐曲线 ,将入射光聚焦在晶体的中心区域 ,获得最大倍频光输出能量为 1 32mJ。脉冲能量转换效率为 2 4 % ,主脉冲的最大转换效率为 4 %。还分析了脉冲重复频率的变化 ( <10Hz)对倍频转换效率的影响。实验结果发现抑制倍频转换效率的主要因素为晶体的光学质量、激光脉冲低功率密度的拖尾以及激光脉冲的不稳定。特别由于脉冲附带长的拖尾加剧了热透镜效应 ,使得脉冲重复频率的增加引起转换效率的降低。
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| 关 键 词： | 非线性光学 倍频 TEA CO2激光 AgGaSe2晶体 |
| 收稿时间： | 2003/1/8 |
Experimental Research on the Second Harmonic Generation of TEA CO2 Laser in AgGaSe2 Crystal |
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| HUANG Jin zhe ,REN De ming ,ZHANG Li li ,WANG Yu hong ,QU Yan chen ,HU Xiao yong Institute of Optoelectronics,Harbin Institute of Technology,Harbin,Helongjiang ,China.Experimental Research on the Second Harmonic Generation of TEA CO2 Laser in AgGaSe2 Crystal[J].Chinese Journal of Lasers,2004,31(5):559-562. |
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| Authors: | HUANG Jin zhe REN De ming ZHANG Li li WANG Yu hong QU Yan chen HU Xiao yong Institute of Optoelectronics Harbin Institute of Technology Harbin Helongjiang China |
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| Institution: | HUANG Jin zhe 1,2,REN De ming 1,ZHANG Li li 1,WANG Yu hong 1,QU Yan chen 1,HU Xiao yong 1 1Institute of Optoelectronics,Harbin Institute of Technology,Harbin,Helongjiang 150001,China 2Department of Electronic Science and Technology,Harbin University of Science and Technology,West Campus,Harbin,Helongjiang 150080,China) |
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| Abstract: | In this paper, the second harmonic generation (SHG) of the TEA CO2 laser in an AgGaSe2 nonlinear crystal is realized. How energy of TEA CO2 laser, repetition frequency of pulse and focal position affect SHG is studied emphatically. The tuning curve upon incident angle is obtained and the maximal second harmonic energy 1.32 mJ is measured with the energy conversion efficiency 2.4% for total and 4% for main peak. Besides, the influence of pulse repetition rate (<10 Hz) on SHG conversion efficiency is analyzed. From the experimental results, it is found that the main factors restraining conversion efficiency are the crystal′s optical quality, the low power intensity tail of lasing pulse and the instability of pulse radiation. Specially, the thermal lens effect is intensified due to the long tail attached to pulse, which leads to decreasing of conversion efficiency if pulse repetition rate is enhanced. |
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| Keywords: | nonlinear optics SHG TEA CO 2 laser AgGaSe 2 crystal |
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