| 部分相干涡旋光束在湍流大气中的相干性 |
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| 引用本文： | 杨蓉青.部分相干涡旋光束在湍流大气中的相干性[J].龙岩学院学报,2008,26(6). |
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| 作者姓名： | 杨蓉青 |
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| 作者单位： | 福建信息职业技术学院,福建福州350019 |
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| 摘 要： | 根据广义的惠更斯-菲涅耳原理，得到了部分相干涡旋光束在湍流大气中传输时光谱相干性的理论表达式，然后详细研究了光束在湍流介质中传输时相干性的变化规律。研究表明，部分相干涡旋光束通过湍流介质后，光束的相干性主要受到湍流扰动强弱和光束所带的拓扑电荷数多少的影响，而与光源本身的相干性无关。光源所带的拓扑电荷数越多，光束的相干性越差；湍流扰动越强，光束的相干性越好。
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| 关 键 词： | 部分相干光束 涡旋光束 拓扑电荷 湍流大气 相干性 |
Degree of Coherence of Partially Coherent Vortex Beam Propagating in Turbulent Atmosphere |
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| YANG Rong-qing.Degree of Coherence of Partially Coherent Vortex Beam Propagating in Turbulent Atmosphere[J].Journal of Longyan Univercity,2008,26(6). |
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| Authors: | YANG Rong-qing |
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| Abstract: | Based on the extended Huygens-Fresnel principle,the formula for the change in the degree of coherence of partially coherent vortex beam in turbulent atmosphere has been derived.Then the degree of coherence of such beam propagating in turbulent atmosphere has been studied at great length.It has been shown that the change in the degree of coherence of such a beam is mainly influenced by turbulence and topological charge of source after propagating a long distance in turbulent atmosphere.It has also been found... |
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| Keywords: | partially coherent beam vortex beam topological charge turbulent atmosphere coherence |
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