声光Q开关衍射特性的空间分布  

Special distribution of diffraction efficiency in the acousto-optic Q-switch

作　　者：叶艳[1] 王石语[1] 文建国[1] 蔡德芳[1] 过振[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《西安电子科技大学学报》2003年第3期391-393,共3页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60078022)

摘　　要：利用声光Q开关中衍射效率最大的位置调Q可以发挥其最佳的性能.在传统点声源叠加模型的基础上,考虑了介质中的声衰减因素,通过数值计算研究了声光Q开关晶体中超声场的空间分布,得到了晶体中衍射效率的空间分布规律,从而确定了衍射效率最大的位置,并在实验中得到了一致的结果.该结果有助于提高大功率激光二极管泵浦调Q固体激光器输出脉冲的峰值功率,压缩激光脉冲脉宽.Acoustooptic can be optimized by utilizing the site of maximum diffraction efficiency to the Qswitch. Based on the model of the point acousto source, spatial distribution of ultrasound field spatial distribution of the ultrasound field in the acoustooptic crystal is studied by numerical calculation through the consideration of the factor of acousto attenuation. Distribution of diffraction efficiency in the acoustooptic crystal is obtained by analyzing it. So the site of maximum diffraction efficiency is found, and the same outcome is gained in experiment. It is beneficial to gaining optimal parameters(which include the peak power, pulse width, etc.) in DPL.

关 键 词：声光Q开关 衍射效率 空间分布 超声场 位置调Q 激光二极管泵浦固体激光器 

分 类 号：TN248.1[电子电信—物理电子学]