| 厄米-拉盖尔-高斯光束的传输特性 |
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| 引用本文： | 郑振,刘永欣,吕百达.厄米-拉盖尔-高斯光束的传输特性[J].激光技术,2005,29(6):641-644. |
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| 作者姓名： | 郑振 刘永欣 吕百达 |
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| 作者单位： | 四川大学,激光物理与化学研究所,成都,610064;四川大学,激光物理与化学研究所,成都,610064;四川大学,激光物理与化学研究所,成都,610064 |
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| 摘 要： | 利用Collins公式,推导出厄米-拉盖尔-高斯(HLG)光束通过近轴ABCD光学系统的解析传输公式,并用来研究通过自由空间和薄透镜的传输特性.结果表明,除模指数m,n之外,对HLG光束新引入的α参数,它影响光强分布和对称性;HLG光束在传输中保持形状不变;HLG光束的焦移与模指数m,n和α参数无关,这意味着m,n和α不同的HLG光束聚焦在同一位置.并给出了HLG光束的M2因子.
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| 关 键 词： | 厄米-拉盖尔-高斯光束 传输特性 ABCD系统 α参数 M2因子 |
| 文章编号： | 1001-3806(2005)06-0641-04 |
| 收稿时间： | 2004-09-06 |
| 修稿时间： | 2004-11-05 |
Propagation properties of Hermite-Laguerre-Gaussian beams |
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| ZHENG Zhen,LIU Yong-xin,L Bai-da.Propagation properties of Hermite-Laguerre-Gaussian beams[J].Laser Technology,2005,29(6):641-644. |
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| Authors: | ZHENG Zhen LIU Yong-xin L Bai-da |
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| Affiliation: | Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China |
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| Abstract: | Based on Collins formula,an analytical propagation expression for Hermite-Laguerre-Gaussian(HLG) beams through a paraxial optical ABCD system is derived and used to study their propagation properties in free-space and through a thin lens.The results show that,apart from the mode indices m,n,it is necessary for HLG beams to introduce a new parameter α,which affects their intensity distribution and symmetry property.HLG beams preserve their shape upon propagation.There is a focal shift in HLG beams which is independent of the parameters m,n,and α,which means that HLG beams with different values of m,n,α are focused at the same place.The M2 factor of HLG beams is also given. |
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| Keywords: | Hermite-Laguerre-Gaussian(HLG) beam propagation property ABCD system parameter α " target="_blank">2factorzz')" href="#"> M2factor |
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