| 高斯光束通过像散透镜后光束参数的变化 |
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| 引用本文： | 孟祥龙, 赵保银, 聂义友, 等. 高斯光束通过像散透镜后光束参数的变化[J]. 强激光与粒子束, 2007, 19(01). |
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| 作者姓名： | 孟祥龙 赵保银 聂义友 吕百达 |
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| 作者单位： | 1.江西师范大学 物理与通信电子学院,南昌 330027;;;2.四川大学 激光物理与化学研究所,成都 61 0064 |
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| 摘 要： | 以二阶矩和环围功率作为束宽定义，对高斯光束通过像散透镜后光束参数，包括束宽和远场发散角作了解析和数值研究。结果表明：因像散引入束宽和远场发散角的相对误差与像散因子、瑞利尺寸、透镜焦距有关。对于束宽而言，相对误差还与传输距离z有关。在几何焦面处x和y方向束宽的相对误差相等。
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| 关 键 词： | 高斯光束 像散 相对误差 二阶矩 环围功率 |
Parameter changes of Gaussian beams after passing through astigmatic lens |
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| meng xiang-long, zhao bao-yin, nie yi-you, et al. Parameter changes of Gaussian beams after passing through astigmatic lens[J]. High Power Laser and Particle Beams, 2007, 19. |
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| Authors: | meng xiang-long zhao bao-yin nie yi-you lu bai-da |
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| Affiliation: | 1. College of Physics and Communication Electronics,Jiangxi Normal University,Nanchang 330027,China;;;2. Institute of Laser Physics and Chemistry,Sichuan University,Chengdu 610064,China |
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| Abstract: | Taking the second-order-moment and power of the bucket as the beam width definition, changes of the beam parameters such as the beam width and far field divergence angle of Gaussian beams after passing through an astigmatic lens are studied both analytically and numerically. It is found that the relative errors of the beam width and far-field divergence angle introduced by the astigmatism depend on the astigmatic coefficient, the Rayleigh range and the focal length of the lens. For the beam width, the errors also depend on the propagation distance. At the geometrical focal plane the relative errors in the x and y directions are equal. The results are of practical interest for the design of laser optics systems. |
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| Keywords: | gaussian beams astigmatism relative error second-order moment power in the bucket |
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