摘要
本文研究激光通过超声光栅形成的拉曼-纳斯声光衍射,发现衍射级次的出现随超声波频率的改变而呈现周期性的变化,然后从理论上分析这种周期性变化的形成机理。实验结果给出:拉曼-纳斯声光衍射的一级衍射角是一固定值。当超声波频率的改变范围不大时,一级衍射角不随超声波频率的改变而改变。这与理论预期有偏差,理论上给出衍射角与超声波频率有关。这一发现对声光效应在光束偏转等方面的应用有重要的意义。
Based on the analysis of the ultrasonic grating formed by laser,the diffraction angle of the typical Naman-Nath diffraction was studied.The experiment result indicates that the diffraction orders change in cyclic rule with changing of ultrasound frequency,and the position of the diffraction order keeps fixation which is different from the theoretical form.A diffraction angle is a certain value which does not change with the ultrasound frequency.
出处
《贵州大学学报（自然科学版）》
2012年第1期27-29,共3页
Journal of Guizhou University:Natural Sciences
基金
国家自然科学基金资助项目(60966002)
贵州大学研究生创新基金资助课题(2011005)
