| Off-Axis Astigmatic Gaussian Beam Combination Beyond the Paraxial Approximation |
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| 作者姓名： | GAO Zeng-Hui Lü Bai-Da |
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| 作者单位： | [1]Institute of Optoelectronic Information, Yibin University, Yibin 644000 [2]Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10574097. |
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| 摘 要： | Taking the off-axis astigmatic Gaussian beam combination as an example, the beam-combination concept is extended to the nonparaxial regime. The closed-form propagation expressions for coherent and incoherent combinations of nonparaxial off-axis astigmatic Gaussian beams with rectangular geometry are derived and illustrated with numerical examples. It is shown that the intensity distributions of the resulting beam depend on the combination scheme and beam parameters in general, and in the paraxial approximation （i.e., for the small f-parameter） our results reduce to the paraxial ones.
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| 关 键 词： | 散光 光束 旁轴 近似值 |
| 收稿时间： | 2007-3-28 |
| 修稿时间： | 2007-03-28 |
Off-Axis Astigmatic Gaussian Beam Combination Beyond the Paraxial Approximation |
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| GAO Zeng-Hui, LU Bai-Da.Off-Axis Astigmatic Gaussian Beam Combination Beyond the Paraxial Approximation[J].Chinese Physics Letters,2007,24(9):2575-2578. |
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| Authors: | GAO Zeng-Hui LU Bai-Da |
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| Institution: | 1 Institute of Optoelectronic Information, Yibin University, Yibin 644000; 2 Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064 |
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| Abstract: | Taking the off-axis astigmatic Gaussian beam combination as an example,the beam-combination concept is extended to the nonparaxial regime. Theclosed-form propagation expressions for coherent and incoherent combinations of nonparaxial off-axis astigmatic Gaussian beams with rectangular geometry are derived and illustrated with numerical examples. It is shown that the intensity distributions of the resulting beam depend on the combination scheme and beam parameters in general, and in the paraxial approximation (i.e., for the small f-parameter) our results reduce to the paraxial ones. |
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| Keywords: | 41 85 Ew 41 85 Ja 42 25 Kb |
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