| BBO晶体倍频中的温度场与光场耦合模拟 |
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| 引用本文： | 黄金哲,王宏,常彦琴,沈涛.BBO晶体倍频中的温度场与光场耦合模拟[J].海洋学报,2010,32(9):6243-6249. |
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| 作者姓名： | 黄金哲 王宏 常彦琴 沈涛 |
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| 作者单位： | 哈尔滨理工大学光信息科学与技术系,哈尔滨 150080;哈尔滨理工大学光信息科学与技术系,哈尔滨 150080;哈尔滨理工大学光信息科学与技术系,哈尔滨 150080;哈尔滨理工大学光信息科学与技术系,哈尔滨 150080 |
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| 基金项目： | 黑龙江省教育厅青年学术骨干项目(批准号:1151G013)和俄罗斯联邦目标计划SSPP项目(批准号:SS-4297.2010.2)资助的课题. |
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| 摘 要： | 首先建立了无限大晶体截面近似下的时-空4维光场和温度场耦合的倍频模型. 并在瓦级功率激光抽运下,利用解析公式和迭代方法数值模拟了BBO晶体内的倍频过程.得到了基频光和倍频光的振幅和转换效率曲线以及温度场分布,展示了温度场及光场的时间演化过程. 其次分析了抽运功率和晶体长度对转换效率和温度场的影响. 结果给出,温度分布对转换效率和光束质量都有较大影响;对热效应引起的相位失配进行补偿能够很好地改善转换效率的下降,因此必须在实际应用中加以考虑.
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| 关 键 词： | 倍频 温度场 BBO晶体 |
Simulation of the temperature-beam coupling in frequency doubling of BBO crystals |
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| Huang Jin-Zhe,Wang Hong,Chang Yan-Qin and Shen Tao.Simulation of the temperature-beam coupling in frequency doubling of BBO crystals[J].Acta Oceanologica Sinica (in Chinese),2010,32(9):6243-6249. |
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| Authors: | Huang Jin-Zhe Wang Hong Chang Yan-Qin and Shen Tao |
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| Institution: | Department of Optical Information Science and Technology, Harbin University of Science and Technology, Harbin 150080, China;Department of Optical Information Science and Technology, Harbin University of Science and Technology, Harbin 150080, China;Department of Optical Information Science and Technology, Harbin University of Science and Technology, Harbin 150080, China;Department of Optical Information Science and Technology, Harbin University of Science and Technology, Harbin 150080, China |
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| Abstract: | First, a frequency doubling model with 4-dimensional temperature-beam coupling was proposed in this paper on the assumption of an infinite transverse crystal section. The frequency doubling process, by using analytical formula and iterative method, was simulated in the BBO crystal pumped by a laser with watt-level power. The amplitudes and conversion efficiencies of the fundamental, and harmonic beams and temperature distributions were obtained, together with the time evolution of temperature field and beam intensities. The influence of the pumping power and crystal length on the conversion efficiency and temperature field was analyzed secondly. The results finally showed that the temperature distribution has great influence on the conversion efficiency and beam quality. A compensation for the phase mismatch induced by temperature can well improve the reduction of conversion efficiency induced by the thermal effect, which thus should be considered in practice. |
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| Keywords: | frequency doubling temperature field BBO crystal |
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