| 湍流大气中SHG光束和EHG光束的M~2因子的比较 |
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| 引用本文： | 黄永平,曾安平,段志春.湍流大气中SHG光束和EHG光束的M~2因子的比较[J].宜宾师范高等专科学校学报,2010(12). |
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| 作者姓名： | 黄永平 曾安平 段志春 |
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| 作者单位： | 宜宾学院计算物理重点实验室 宜宾学院计算机学院 |
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| 基金项目： | 四川教育厅科研基金(10ZC032);; 宜宾学院自然科学基金项目(2010ZS06) |
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| 摘 要： | 基于广义的惠更斯-菲涅尔原理和Wigner分布函数(WDF)二阶矩的定义,对常规厄米-高斯(SHG)光束和复宗量厄米-高斯(EHG)光束通过湍流大气的M2因子和相对M2因子进行了对比分析.结果表明,大气湍流中在相同条件下的SHG和EHG光束的M2因子存在明显的差异,仅有阶数m=0、m=1时SHG和EHG光束的M2因子的相等,当m≥2时,EHG光束的M2因子比SHG光束显著小,但SHG光束的相对M2因子比EHG光束的显著小,说明SHG光束比EHG光束受湍流大气影响更小.
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| 关 键 词： | 激光光学 SHG光束 EHG光束 大气湍流 M2因子 |
A Comparative Study about the M~2-factor of Standard and Elegant Hermite-Gaussian Beams in a Turbulent Atmosphere |
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| HUANG Yong-pinga; ZENG An-pingb; DUAN Zhi-chun.A Comparative Study about the M~2-factor of Standard and Elegant Hermite-Gaussian Beams in a Turbulent Atmosphere[J].Journal of Yibin Teachers College,2010(12). |
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| Authors: | HUANG Yong-pinga; ZENG An-pingb; DUAN Zhi-chun |
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| Institution: | HUANG Yong-pinga; ZENG An-pingb; DUAN Zhi-chuna(a.Computational Physics Key Laboratory of Sichuan Province; b.School of Computer and Information Engineering; Yibin University; Yibin 644007; China); |
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| Abstract: | Based on the extended Huygens-Fresnel principle and the definition of the second-order moments of the Wigner distribution function(WDF),the M2-factor and relative M2-factor of the standard Hermite-Gaussian(SHG) and elegant Hermite-Gaussian(EHG) beams passing through a turbulent atmosphere were analyzed.The results show that in the turbulent atmosphere,the M2 factor of them have much difference under the same conditions except for their beam order m=0 and m=1.When m ≥ 2,the M2factor of SHG beams is always la... |
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| Keywords: | laser optics SHG beam EHG beam atmospheric turbulence M2 factor |
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