| 部分相干椭球光笼 |
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| 引用本文： | 刘晓云,蒲继雄.部分相干椭球光笼[J].强激光与粒子束,2005,17(6):821-824. |
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| 作者姓名： | 刘晓云 蒲继雄 |
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| 作者单位： | 华侨大学,电子科学与技术系,福建,泉州,362021;华侨大学,电子科学与技术系,福建,泉州,362021 |
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| 基金项目： | 国家自然科学基金资助课题(60477041)，国务院侨务办公室科研基金资助课题(03QZR4) |
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| 摘 要： | 从理论上研究部分相干光束经透镜聚焦的三维光强分布。研究结果表明，在几何焦点附近的光强分布不仅依赖于入射部分相干光束的光强分布，而且还依赖于入射光束的空间相干度。基于这一点，提出了一种控制部分相干光束的空间相干度，在几何焦点附近获得了类似椭球光笼形状的光强分布的新方法。通过控制入射部分相干光的空间相干度，来改变聚焦在几何焦点附近的三维光强分布，从而获得希望得到的光强分布。
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| 关 键 词： | 部分相干光 空间相干 聚焦 光束整形 |
| 文章编号： | 1001-4322(2005)06-0821-04 |
| 收稿时间： | 2004/10/19 |
| 修稿时间： | 2004年10月19 |
Partially coherent ellipsoid light cage |
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| LIU Xiao-yun,PU Ji-xiong.Partially coherent ellipsoid light cage[J].High Power Laser and Particle Beams,2005,17(6):821-824. |
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| Authors: | LIU Xiao-yun PU Ji-xiong |
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| Affiliation: | Department of Electronic Science and Technology, Huaqiao University, Quanzhou 362021,China |
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| Abstract: | The three-dimensional intensity distribution of the partially coherent beams focused by a lens 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. Based on this point, a novel method is presented for achieving a quasi-ellipsoid light cage profile near the geometric focus by modulating the spectral degree of coherence of the incident partially coherent beam. The modulation, can obtain the desired three-dimensional intensity distribution and control the aperture of the ellipsoid light cage by choosing the appropriate parameters of spectral degree at the lens plane without changing the incident beam. The method is of the potential use value. |
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| Keywords: | Partially coherent light Spatial coherence Focus Beam shaping |
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