Laser Line Competition in Optically Pumped D2O THz Laser

被引：0
作者：
Pingyuan Liang
Meng Meng
Jiangchu Liang
Xizhang Luo
机构：
[1] Jishou University,School of Information Science & Engineering
[2] Sun Yat-sen University,School of Information Science and Technology
[3] Huizhou University,Department of Electronic Science
来源：
Journal of Infrared, Millimeter, and Terahertz Waves | 2012年 / 33卷
关键词：
THz laser; Laser line competition; Optical pumping; D; O;
D O I：
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中图分类号：
学科分类号：
摘要：
Based on the theory of semi-classical density matrix and a model of double three-energy-level (DTEL) system for laser line competition in optically pumped D2O super-radiant terahertz laser (THz Laser), the mathematical expressions of gain coefficients for pumping signal and THz laser signal are deduced, and the competition between 66 μm and 116 μm laser lines is calculated numerically by means of iteration method. The effects of the operation conditions (including pump power, working gas pressure and the length of cavity) on the competition are analyzed. It is found that 66 μm emission dominated the competition; with the increase of working gas pressure (or the cavity length), the spectrum of 66 μm emission experiences changes from discrete double-peak structure to overlapped double-peak structure and finally to a wide-band structure, and the optimum gas pressure varied conversely with the optimum length of the THZ laser cavity.
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页码：1018 / 1028
页数：10
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