| 低频声表面波对细激光束的衍射效应 |
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| 引用本文： | 苗润才,李芳菊,董军,祁建霞.低频声表面波对细激光束的衍射效应[J].光子学报,2007,36(5):877-880. |
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| 作者姓名： | 苗润才 李芳菊 董军 祁建霞 |
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| 作者单位： | 1. 陕西师范大学,物理学与技术信息学院,西安,710062;榆林学院,物理系,陕西榆林,719000
2. 陕西师范大学,物理学与技术信息学院,西安,710062 |
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| 基金项目： | 教育部教师重点资金(02068)资助 |
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| 摘 要： | 对于频率为几十赫兹的液体表面声波,实验上观察到反射光所形成的稳定、清晰的激光干涉图样.改变表面声波振幅,进一步发现了干涉图样的调制效应.调制效应明显地表现为干涉条纹的缺级,并且随表面声波振幅变化.依据波动光学原理,分析了调制作用下光束干涉所产生的光强解析分布及条纹特征,得到了干涉条纹角宽度与表面声波之间的解析关系,并据此对表面声波的特性参量波长和振幅及各级条纹相对光强分布规律进行了测定.
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| 关 键 词： | 双光束干涉 SAW 衍射 |
| 文章编号： | 1004-4213（2007）05-0877-4 |
| 收稿时间： | 2005-10-24 |
| 修稿时间： | 2005-10-25 |
Diffraction Effect of Thin Laser Beam from Liquid Surface Waves at Low-Frequency |
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| MIAO Run-cai,LI Fang-ju,DONG Jun,QI Jian-xia.Diffraction Effect of Thin Laser Beam from Liquid Surface Waves at Low-Frequency[J].Acta Photonica Sinica,2007,36(5):877-880. |
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| Authors: | MIAO Run-cai LI Fang-ju DONG Jun QI Jian-xia |
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| Abstract: | High visible laser interference patterns from liquid surface acoustic waves (SAW) at a few tens Hertz were obtained experimentally.Modulation effect of interference patterns was observed and appeared as the disappearance of interference fringe in company with the variation of SAW amplitude.The intensity distribution of light,interference fringe and its characters were analyzed and the angle width of the interference fringe range with SAW was derived by theory of wave optics under the action of modulation. Moreover,based on the discovery,wavelength and amplitude of SAW and the distuibutive regularity of fringes light intensity were determined. |
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| Keywords: | Interference of double beams Surface acoustic wave Diffraction |
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