Numerical Study of Transient Temperature Distribution in Passively Q-Switched Yb:YAG Solid-State Laser

作     者：Jala M. El-Azab Hamed M. Kandel Mohamed A. Khedr Hatem M. El-Ghandoor 

作者机构：National Institute of Laser Enhanced Sciences Cairo University Cairo Egypt Physics Department Faculty of Science Ain Shams University Cairo Egypt 

出 版 物：《Optics and Photonics Journal》 (光学与光子学期刊（英文）)

年 卷 期：2014年第4卷第3期

页      面：46-53页

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

主　　题：Q-Switched Laser Temperature Distribution Thermal Lensing 

摘      要：In this work, the thermal characterization of continuously pumped passively Q-switched laser is quantitatively represented. The system under investigation is end-pumped Yb:YAG passively Q-switched by Cr4+:YAG as saturable absorber. The rate equations describing the dynamics of laser action are numerically solved simultaneously with the temperature conductivity heat equation to depict the transient temperature distribution. The study has been performed in the cylindrical coordinates to characterize the temperature distribution in the axial and radial directions. The thermal transient time in both directions as well as the thermal focal length are calculated. The temporal behavior of the temperature distribution has been illustrated in a 3-dimensional diagram.