TITLE:
Numerical Study of Transient Temperature Distribution in Passively Q-Switched Yb:YAG Solid-State Laser
AUTHORS:
Jala M. El-Azab, Hamed M. Kandel, Mohamed A. Khedr, Hatem M. El-Ghandoor
KEYWORDS:
Q-Switched Laser; Temperature Distribution; Thermal Lensing
JOURNAL NAME:
Optics and Photonics Journal,
Vol.4 No.3,
March
27,
2014
ABSTRACT: 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.