| 一种产生平顶光束的新方法:厄米-高斯光束的合成 |
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| 引用本文： | 吴平,庄建,吕百达.一种产生平顶光束的新方法:厄米-高斯光束的合成[J].中国激光,2004,31(1):8-52. |
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| 作者姓名： | 吴平 庄建 吕百达 |
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| 作者单位： | 1. 西南交通大学应用物理系,四川,成都,610031
2. 西南交通大学应用物理系,四川,成都,610031;四川大学激光物理与化学研究所,四川,成都,610064;华中科技大学激光技术国家重点实验室,湖北,武汉,430074 |
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| 基金项目： | 西南交通大学校科学研究基金，国家高技术光束控制重点实验室基金资助项目 |
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| 摘 要： | 提出了用多束厄米-高斯光束相干合成产生平顶光束的方法。借助Wigner分布函数和强度矩方法推导出在普遍情况下合成光束M^2因子和K参数的解析公式。研究结果表明，通过适当选取厄米-高斯光束的参数，在某一传输平面可以得到平顶的光强剖面。给出了数值计算例以说明合成平顶光束的特性。
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| 关 键 词： | 几何光学 平顶光束 光束合成 Wigner分布函数 强度矩 厄米-高斯光束 |
| 收稿时间： | 2002/6/4 |
A New Method for Producing Flat-topped Beams:Hermite-Gaussian Beam Combination |
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| WU Ping ,ZHUANG Jian ,Lu Bai-da , Dept. of Applied Physics,Southwest Jiaotong University,Chengdu,Sichuan ,China Institute of Laser Physics & Chemistry,Sichuan University,Chengdu,Sichuan ,China State Key Laboratory of Laser Technology,Huazhong University of Science & Technology,Wuhan,Hubei ,China.A New Method for Producing Flat-topped Beams:Hermite-Gaussian Beam Combination[J].Chinese Journal of Lasers,2004,31(1):8-52. |
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| Authors: | WU Ping ZHUANG Jian Lu Bai-da Dept of Applied Physics Southwest Jiaotong University Chengdu Sichuan China Institute of Laser Physics & Chemistry Sichuan University Chengdu Sichuan China State Key Laboratory of Laser Technology Huazhong University of Science & Technology Wuhan Hubei China |
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| Affiliation: | WU Ping 1,ZHUANG Jian 1,Lu Bai-da 1,2,3 1Dept. of Applied Physics,Southwest Jiaotong University,Chengdu,Sichuan 610031,China 2Institute of Laser Physics & Chemistry,Sichuan University,Chengdu,Sichuan 610064,China 3State Key Laboratory of Laser Technology,Huazhong University of Science & Technology,Wuhan,Hubei 430074,China |
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| Abstract: | The coherent combination of multi-Hermite-Gaussian beams is proposed to describe the flat-topped beams. Based on the Wigner distribution function and intensity moments methods, the analytical equations of beam propagation factor (M 2 factor) and kurtosis parameter (K parameter) of the resulting beam are derived in the general case. It is shown that a flat-topped intensity profile of the resulting beam can be obtained at a certain plane by an appropriate choice of the parameters of Hermite-Gaussian beams. Numerical examples are given to illustrate properties of the resulting beam. |
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| Keywords: | geometrical optics flat-topped beam beam combination Wigner distribution function intensity moment |
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