| 超短脉冲贝塞尔光束的非近轴效应对传输的影响 |
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| 引用本文： | 刘志军,吕百达.超短脉冲贝塞尔光束的非近轴效应对传输的影响[J].强激光与粒子束,2004,16(1):5-8. |
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| 作者姓名： | 刘志军 吕百达 |
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| 作者单位： | 1. 四川大学 激光物理与化学研究所，四川 成都 610064; 2. 华中科技大学 激光技术国家重点实验室，湖北 武汉 430074 |
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| 基金项目： | 华中科技大学激光技术国家重点实验室基金资助课题 |
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| 摘 要： | 对超短脉冲贝塞尔光束在近轴近似和非近轴情况下自由空间中的传输作了研究。结果表明，其空间波形在传输中保持贝塞尔形状不变，不受非近轴效应影响；然而当空间参数较大时，非近轴效应影响超短脉冲贝塞尔光束的时间波形。
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| 关 键 词： | 非近轴效应 脉冲贝塞尔光束 自由空间传输 |
| 文章编号： | 1001-4322(2004)01-0005-04 |
| 收稿时间： | 2002/12/27 |
| 修稿时间： | 2002年12月27 |
Non-paraxial effect of ultrashort pulsed Bessel beams on their propagation |
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| liu zhijun,lv baida.Non-paraxial effect of ultrashort pulsed Bessel beams on their propagation[J].High Power Laser and Particle Beams,2004,16(1):5-8. |
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| Authors: | liu zhijun lv baida |
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| Institution: | 1. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China;2. State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | The propagation of ultrashort pulsed Bessel beams in free space within and beyond the paraxial approximation is studied. It is shown that the non-paraxial effect does not affect their spatial pulse profile, which retains the Bessel shape unchanged upon propagation, whereas it affects their temporal pulse form if the spatial parameter α becomes relatively large. The condition, under which the paraxial approximation is valid, is found to be α<ω_(min)/2c, where ω_(min) denotes the minimum frequency of the pulse spectrum and c is the velocity of light. |
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| Keywords: | Non-paraxial effect Pulsed Bessel beam Propagation in free space |
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