| Vectorial Nonparaxial Four-Petal Gaussian Beams and Their Propagation in Free Space |
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| 引用本文： | GAO Zeng-Hui,Lü Bai-Da. Vectorial Nonparaxial Four-Petal Gaussian Beams and Their Propagation in Free Space[J]. 中国物理快报, 2006, 23(8): 2070-2073 |
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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： | The vectorial nonparaxial four-petal Gaussian beam （FPGB） is introduced. The closed-form propagation expressions for the free-space propagation of FPGBs are derived and their more general applicable advantages are illustrated analytically and numerically. Some special interesting cases, in particular the paraxial one, are discussed. It is found that the parameter f = 1/kwo with the k being the wave number and wo being the waist width plays a crucial role in determining the nonparaxiallity of FPGBs. For small values of the f parameter the paraxial approximation is allowable. In the nonparaxial regime the beam order n additionally affects the vectorial and nonparaxial behaviour of FPGBs.
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| 关 键 词： | 高斯束 自由空间 FPGB 波数 |
| 收稿时间： | 2006-01-16 |
| 修稿时间： | 2006-01-16 |
Vectorial Nonparaxial Four-Petal Gaussian Beams and Their Propagation in Free Space |
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| GAO Zeng-Hui, LU Bai-Da. Vectorial Nonparaxial Four-Petal Gaussian Beams and Their Propagation in Free Space[J]. Chinese Physics Letters, 2006, 23(8): 2070-2073 |
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| Authors: | GAO Zeng-Hui LU Bai-Da |
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| Affiliation: | 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: | The vectorial nonparaxial four-petal Gaussian beam (FPGB) is introduced. The closed-form propagation expressions for the free-space propagation of FPGBs are derived and their more general applicable advantages are illustrated analytically and numerically. Some special interesting cases, in particular the paraxial one, are discussed. It is found that the parameter f =1/kw0 with the k being the wave number and w0 being the waist width plays a crucial role in determining the nonparaxiallity of FPGBs. For small values of the f parameter the paraxial approximation is allowable. In the nonparaxial regime the beam order n additionally affects the vectorial and nonparaxial behaviour of FPGBs. |
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| Keywords: | 41.85.Ew 42.25.Bs 42.60.Jf |
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