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截断高斯-谢尔光束在非Kolmogorov湍流中的相对扩展

Relative Spreading of Truncated Gaussian-Shell-Model Beam in Non-Kolmogorov Turbulence

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摘要

为了研究截断高斯-谢尔光束在非Kolmogorov 湍流中的相对扩展。采用广义惠更斯-菲涅耳原理和积分变换技术求解出了光束在非Kolmogorov 湍流中的二阶矩束宽和相对束宽的表达式,并定量地研究了束宽和相对束宽随束腰w0 、相干参数α 、截断参数δ 及湍流广义指数γ 的变化规律。研究发现α 和δ 越小,湍流对光束扩展的影响则越小,湍流对光束扩展的影响随w0 和γ 的增大而先增大后减小,并对主要结果给出了相应的物理解释。

Abstract

To study the relative spreading of truncated Gaussian Shell-model (GSM) beam propagating through non-Kolmogorov turbulence, the extended Huygens-Fresnel principle and integral transform technique are used to derive the expressions for the mean-squared width and relative width of truncated GSM beam propagating through non-Kolmogorov turbulence. The variation of the mean-squared width and relative width versus waist width w0, coherence parameter α , truncation parameter δ and generalized exponent parameter γ are analyzed numerically. The results show the beam spreading is less affected by turbulence with the smaller α and δ , and the influence of non-Kolmogorov turbulence on beam spreading increases first and then decreases due to increasing waist width w0 and γ . The results obtained above are explained physically.

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中图分类号:O436;TN012

DOI:10.3788/lop52.110104

所属栏目:大气光学与海洋光学

基金项目:教育部留学回国人员科研启动基金( 第39 批,教外司[2010]1174 号)、四川省教育厅资助项目(12ZB048,13ZB0244)

收稿日期:2015-05-27

修改稿日期:2015-06-09

网络出版日期:2015-09-02

作者单位    点击查看

陈晓文:川北医学院影像学院, 四川 南充 637000
李宾中:川北医学院基础医学院物理教研室, 四川 南充 637000
汤明玥:川北医学院基础医学院物理教研室, 四川 南充 637000

联系人作者:陈晓文(xw-c@163.com)

备注:陈晓文(1984—),男,硕士,讲师,主要从事激光传输与变换方面的研究。

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引用该论文

Chen Xiaowen,Li Binzhong,Tang Mingyue. Relative Spreading of Truncated Gaussian-Shell-Model Beam in Non-Kolmogorov Turbulence[J]. Laser & Optoelectronics Progress, 2015, 52(11): 110104

陈晓文,李宾中,汤明玥. 截断高斯-谢尔光束在非Kolmogorov湍流中的相对扩展[J]. 激光与光电子学进展, 2015, 52(11): 110104

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