| 环形斑光束在非线性克尔介质中的自聚焦效应 |
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| 引用本文： | 苗润才,沈常宇,叶青,滕晓丽.环形斑光束在非线性克尔介质中的自聚焦效应[J].光子学报,2003,32(2):204-208. |
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| 作者姓名： | 苗润才 沈常宇 叶青 滕晓丽 |
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| 作者单位： | 陕西师范大学物理学与信息技术学院,西安,710062 |
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| 基金项目： | 教育部骨干教师基金 (批准号 :2 0 0 0 6 5 )资助项目 |
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| 摘 要： | 通过数值求解非线性Schrödinger方程,详细讨论了环形斑光束在非线性克尔介质中的传输特性.当入射光超过一定的功率时,光束产生多级自聚焦现象,自聚焦焦点出现在离轴的环上;自聚焦阈值与环形光束的半径有关;传输过程中光斑存在横向分裂现象,并且分裂与聚焦交替进行;当两个半径不同的同轴环状光束同时在非线性介质中传输时产生耦合效应,耦合效应使其自聚焦增强.
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| 关 键 词： | 环形斑激光束 克尔介质 非线性传输 自聚焦 |
| 收稿时间： | 2002/4/23 |
| 修稿时间： | 2002年4月23日 |
Self-Focusing Effect of Circle Spot Laser Beam in Kerr-medium |
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| Miao Runcai,Shen Changyu,Ye Qing,Teng Xiaoli College of Physics and Information Technology,Shaanxi Normal University Xi'an China.Self-Focusing Effect of Circle Spot Laser Beam in Kerr-medium[J].Acta Photonica Sinica,2003,32(2):204-208. |
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| Authors: | Miao Runcai Shen Changyu Ye Qing Teng Xiaoli College of Physics and Information Technology Shaanxi Normal University Xi'an China |
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| Institution: | Miao Runcai,Shen Changyu,Ye Qing,Teng Xiaoli College of Physics and Information Technology,Shaanxi Normal University Xi'an 710062 China |
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| Abstract: | The transmission of circle spot laser beam in Kerr-medium is investigated with solving nonlinear Schrdinger equation numerically. The spot splitting and splitting variation are observed in the transmission process if the laser beam power is above a certain value. The critical power is related with the radius of the circle spot laser beam. It is also discovered the coupling between the double coaxial circles laser beams if they pass through Kerr-medium. |
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| Keywords: | Circle spot laser beam Kerr-medium Nonlinear transmission Self-focusing |
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