| 低功率激光在镍合金分光镜上的自聚焦现象 |
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| 引用本文： | 陈小韵,刘守,张向苏,刘川.低功率激光在镍合金分光镜上的自聚焦现象[J].厦门大学学报(自然科学版),2004,43(6):782-785. |
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| 作者姓名： | 陈小韵 刘守 张向苏 刘川 |
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| 作者单位： | 厦门大学物理学系,福建,厦门,361005 |
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| 摘 要： | 功率在几百毫瓦量级的低功率Ar 激光器所发出的488nm激光束,在未聚焦的情况下(光强度在40W/cm2左右),经镍合金镀膜的分光镜后,观察到自聚焦现象.实验结果表明非线性光折射现象产生于膜层与玻璃基底的交界面,证明在此交界处存在一层非线性介质,是一种新的非线性材料.实验结果还表明此非线性现象的产生机理是光 热效应,并给出实验设置和测试资料,分析了实验结果.
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| 关 键 词： | 自聚焦 非线性光折射 非线性光学介质 低功率激光 镍合金分光镜 |
| 文章编号： | 0438-0479(2004)06-0782-04 |
| 修稿时间： | 2003年11月12 |
Self-focusing of Low Power Laser Beam in Nickel Alloy Coated Beam Splitter |
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| CHEN Xiao-yun,LIU Shou,ZHANG Xiang-su,LIU Chuan.Self-focusing of Low Power Laser Beam in Nickel Alloy Coated Beam Splitter[J].Journal of Xiamen University(Natural Science),2004,43(6):782-785. |
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| Authors: | CHEN Xiao-yun LIU Shou ZHANG Xiang-su LIU Chuan |
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| Abstract: | Laser self-focusing has been observed when several hundred milliwatts 488 nm Ar~ laser beam irradiates on a nickel alloy coated beam splitter.The beam was not focused and had the intensity around 40 W/cm~2.The experimental results demonstrate that the nonlinear refraction is induced on the interface between the coating and the glass substrate,indicating that there is a layer of nonlinear medium at the interface.The medium is a new nonlinear material that has not been reported before.The experimental results also show that the mechanism of the nonlinearity is optic-thermal effect.Experimental arrangement and measured data are presented.The experimental results are analyzed. |
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| Keywords: | self-focusing nonlinear refraction nonlinear optical medium low power laser nickel alloy coated beam splitter |
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