| 超声光栅实验中声致折射率变化的研究 |
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| 引用本文： | 王晓颖,王涛,李武军.超声光栅实验中声致折射率变化的研究[J].大学物理,2012,31(5):50-53. |
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| 作者姓名： | 王晓颖 王涛 李武军 |
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| 作者单位： | 1. 西安工业大学理学院,陕西西安,710032
2. 西安应用光学研究所,陕西西安,710065 |
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| 基金项目： | 西安工业大学2011年教学改革研究项目 |
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| 摘 要： | 为了研究声光效应中声致折射率变化情况,以超声光栅实验为基础,用CCD结合光强分析软件,分析了衍射光的强度分布;通过数值计算衍射光相对强度,比较得到了在超声场频率为10.27 MHz时,介质中的声光相位延迟Δ=1.2855 rad,声致折射率变化量Δn=3.014×10-6;进而讨论了电声换能器的机电耦合效率与超声频率的关系,给出当超声频率为10.33 MHz时,耦合效率最高,介质中折射率变化量最大;结果表明,在超声光栅实验中,引入这些测量内容,不仅能丰富实验内容,更能加深学生理解声光效应,扩展学生的知识面.
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| 关 键 词： | 超声光栅 衍射 强度分析 折射率 |
The study of the refractive index increment on the ultrasonic grating experimentation |
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| WANG Xiao-ying
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WANG Tao
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LI Wu-jun.The study of the refractive index increment on the ultrasonic grating experimentation[J].College Physics,2012,31(5):50-53. |
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| Authors: | WANG Xiao-ying WANG Tao LI Wu-jun |
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| Institution: | 1(1.College of Science,Xi’an Technological University,Xi’an,Shaanxi 710032,China; 2.Xi’an Institute of Applied Optics,Xi’an,Shaanxi 710065,China) |
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| Abstract: | In order to study the refractive index change of the acoustic-optic effect,the intensity distribution of the diffraction spectrum is analyzed by CCD image disposal based on ultrasonic grating experimentation.The phases delay Δ=1.2855 rad and the refractive index increment Δn=3.014×10-6 are obtained by the comparative numerical calculating value on the ultrasonic frequency 10.27MHz.The relation of the piezoelectricity coupling effciency with ultrasonic frequency is discussed,the most coupling efficiency value and the most refractive index increment are obtained for ultrasonic frequency 10.33MHz.The results show that this content can not only enrich experimentation content but can also grow on comprehend acoustic-optic effect on the ultrasonic grating experimentation. |
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| Keywords: | ultrasonic grating diffraction intensity analysis refractive index |
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