| 非线性介质中会聚高功率激光的焦点位置控制 |
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| 引用本文： | 刘辉,傅喜泉,侯彦超.非线性介质中会聚高功率激光的焦点位置控制[J].光子学报,2014,40(2):267-271. |
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| 作者姓名： | 刘辉 傅喜泉 侯彦超 |
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| 作者单位： | (湖南大学 信息科学与工程学院 微纳光电器件及应用教育部重点实验室,长沙410082) |
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| 基金项目： | 国家自然科学基金委员会与中国工程物理研究院联合基金（No.10776008）、高等学校博士学科点专项科研基金（No.20070532075）和湖南省科学技术厅科技计划（No.2009FJ3112）资助 |
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| 摘 要： | 为了控制激光束的传输,使激光光束能根据实际情况在特定的位置聚焦,并且保证在传输过程中光束质量不退化,根据透镜聚焦和非线性介质的自聚焦理论,研究了高功率会聚激光光束在两者共同作用下焦点位置的变化.分析了各种因素对高功率激光光束的焦点位置的影响,并通过数值求解光束在非线性Kerr介质中所遵循的非线性薛定谔方程,得到焦点的位置变化和光束初始束宽,输入功率以及透镜焦距的关系,从而找到了控制焦点位置的方法.基于非线性薛定谔方程,对理论分析进行了相应的模拟验证,结果相互吻合.
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| 关 键 词： | 高功率激光 非线性传输 自聚焦 光束束宽 聚焦长度 |
| 收稿时间： | 2010-08-09 |
Control of High-power Laser Focal Position in Nonlinear Media |
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| LIU Hui,FU Xi-quan,HOU Yan-chao.Control of High-power Laser Focal Position in Nonlinear Media[J].Acta Photonica Sinica,2014,40(2):267-271. |
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| Authors: | LIU Hui FU Xi-quan HOU Yan-chao |
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| Institution: | (Key Laboratory for Micro/Nano Optoelectronic Devices(Ministry of Education),School of Information Science and Engineering,Hunan University,Changsha 410082,China) |
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| Abstract: | In order to control the propagation of high power laser beam and make the laser beam focus at any position without quality degradation,the change of high-power laser focal positions was investigated.The proposed research was based on the theory of lens-focusing and laser self-focusing in nonlinear media.Influences of different kinds of factors on the focal position were analyzed.Through numerical solution of the nonlinear Schrdinger equation,the relationships of the focal position with input power,initial waist and focal length of lens were obtained,and thus the method to control the beam focal position was found.The numerical simulations coincide with the theoretical analysis. |
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| Keywords: | High-power laser Nonlinear propagation Self-focusing Beam waist Focusing length |
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