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Off-Axis Astigmatic Gaussian Beam Combination Beyond the Paraxial Approximation
引用本文:GAO Zeng-Hui,Lü Bai-Da. Off-Axis Astigmatic Gaussian Beam Combination Beyond the Paraxial Approximation[J]. 中国物理快报, 2007, 24(9): 2575-2578
作者姓名:GAO Zeng-Hui  Lü Bai-Da
作者单位:[1]Institute of Optoelectronic Information, Yibin University, Yibin 644000 [2]Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064
基金项目:Supported by the National Natural Science Foundation of China under Grant No 10574097.
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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收稿时间:2007-03-28
修稿时间:2007-03-28

Off-Axis Astigmatic Gaussian Beam Combination Beyond the Paraxial Approximation
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
Authors:GAO Zeng-Hui   LU Bai-Da
Affiliation:1 Institute of Optoelectronic Information, Yibin University, Yibin 644000; 2 Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064
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.
Keywords:41.85.Ew  41.85.Ja  42.25.Kb
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