Open AccessExperimental and theoretical study on the optimization of the normalized heating parameter in the operating LD side-pumped Nd:YAG ceramic lasers
Author(s) -
Zhu Hong-Tao,
Qihong Lou,
Yunfeng Qi,
Junhang Dong,
Yunrong Wei
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.5221
Subject(s) - materials science , laser , ceramic , energy conversion efficiency , work (physics) , extraction (chemistry) , optics , optoelectronics , thermodynamics , composite material , physics , chemistry , chromatography
The suppressing effect of laser extraction on the non-radiation transition process is taken into account when the heat model of gain media is developed. Based on the developed heat model, the heat generation in the operating LD side-pumped Nd:YAG ceramic lasers is quantified through using the normalized heating parameter, which can be deduced from the experimental results of the slope efficiency and the absorbed pumping power of the gain media. The main factors which influence on the heat generation are investigated by studying the normalized heating parameter, and the results show that the changes of the laser extraction efficiency, the beam overlap efficiency and the Nd3+ concentration will result in obvious variations of the normalized heating parameter. In this work, the laser extraction efficiency increases to 0.905 by the optimization of the transmission of the output coupling, and the normalized heating parameter decrease to 0.474, correspondingly.