| 利用部分相干效应获得局域空心光束 |
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| 引用本文： | 董梅梅,蒲继雄,刘晓云.利用部分相干效应获得局域空心光束[J].华侨大学学报(自然科学版),2006,27(4):365-368. |
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| 作者姓名： | 董梅梅 蒲继雄 刘晓云 |
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| 作者单位： | 华侨大学信息科学与工程学院,福建,泉州,362021 |
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| 基金项目： | 国家自然科学基金;福建省自然科学基金 |
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| 摘 要： | 研究一种特殊的部分相干光束经透镜聚焦后,在几何焦点附近的三维光强分布.结果表明,几何焦点附近的聚焦光强分布不仅依赖于入射部分相干光的光强分布,还依赖于入射光的空间相干度.据此,可以通过选择合适的空间相干度,产生部分相干局域空心光束.此外,还研究入射部分相干光束的相干度和菲涅耳数对局域空心光束的影响.结果显示,对于相干度一定的部分相干光束,当菲涅耳数小到一定程度时,部分相干局域空心光束的现象将消失.
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| 关 键 词： | 部分相干光 空间相干 聚焦 菲涅耳数 局域空心光束 |
| 文章编号： | 1000-5013（2006）04-0365-04 |
| 收稿时间： | 2006-03-11 |
| 修稿时间： | 2006-03-11 |
Generation of Partially Coherent Bottle Beam with Variable Size by Partially Coherent Effect |
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| Dong Meimei,Pu Jixiong,Liu Xiaoyun.Generation of Partially Coherent Bottle Beam with Variable Size by Partially Coherent Effect[J].Journal of Huaqiao University(Natural Science),2006,27(4):365-368. |
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| Authors: | Dong Meimei Pu Jixiong Liu Xiaoyun |
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| Institution: | College of Information Science and Engineering, Huaqiao University, 362021, Quanzhou, China |
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| Abstract: | In this paper,we have investigated a particular class of partially coherent beam focused by a lens.The three-dimensional intensity distribution near geometrical focus is investigated.It is shown that the focused intensity distribution near the geometrical focus is dependent not only on the intensity distribution of the incident partially coherent beam,but also on the degree of coherence.A partially coherent bottle beam can be generated by choosing appropriate degree of spatial coherence.The influence of the Fresnel number and the degree of coherence of the incident partially coherent beam on the partially coherent beam is studied.We find that,for a certain degree of spatial coherence,the partially coherent bottle beam disappears if the Fresnel number is too small. |
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| Keywords: | partially coherent light spatial coherence focus Fresnel number bottle beam |
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