| 余弦-高斯光束的焦平面及其位置 |
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| 引用本文： | 姜向东,吴运梅,王喜庆.余弦-高斯光束的焦平面及其位置[J].光学技术,2006,32(3):419-421. |
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| 作者姓名： | 姜向东 吴运梅 王喜庆 |
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| 作者单位： | 1. 西南交通大学,应用物理系,成都,610031
2. 西南交通大学,峨眉校区,四川,峨眉山,614202 |
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| 基金项目： | 西南交通大学研究基金资助(2004B19) |
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| 摘 要： | 在余弦_高斯光束通过薄透镜聚焦系统的光场分布函数的基础上,利用二阶矩定义导出了聚焦余弦_高斯光束的光斑函数的解析表达式,由此求得束腰宽度及位置,进而给出了余弦_高斯光束的相对焦移的解析表达式。分析了光学系统参数以及光束参数对实际焦平面位置的影响并作了数值计算。
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| 关 键 词： | 余弦-高斯光束 二阶矩法 光斑尺寸 焦平面 焦移 |
| 文章编号： | 1002-1582(2006)03-0419-03 |
| 收稿时间： | 2005/10/21 |
| 修稿时间： | 2005年10月21 |
Focal plane and the position of the plane in cosine-Gaussian beams |
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| JIANG Xiang-dong,WU Yun-mei,WANG Xi-qing.Focal plane and the position of the plane in cosine-Gaussian beams[J].Optical Technique,2006,32(3):419-421. |
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| Authors: | JIANG Xiang-dong WU Yun-mei WANG Xi-qing |
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| Abstract: | Based on the field distributing expression for cosine-Gaussian beams passing through a thin lens system,the analytical formula for beam width of the focused cosine-Gaussian beam was derived using the second-order moment definition.Both waist width and the position of the waist were obtained.The closed-form expression for the relative focal shift of the focused cosine-Gaussian beam was presented.The dependence of the real focal plane position for the focused cosine-Gaussian beams on the optical system parameters and the beam parameters were analyzed and illustrated with numerical examples. |
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| Keywords: | cosine-Gaussian beam second-order moment method beam width focal plane focal shift |
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