%0 Journal Article
%T Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation<br>
%A Zeng Qin-Yong
%A Wan Yong
%A Xiong Ji-Chuan
%A Zhu Da-Yong
%A <br>
%J 中国物理 B
%D 2011
%I 
%X To account for the effect of lower-level relaxation, we have derived a characteristic equation for describing the laser pulse from the modified rate equations for Q-switched lasers. The pulse temporal profile is related to the ratio of the lower-level lifetime to the cavity lifetime and the number of times the population inversion density is above the threshold. By solving the coupled rate equations numerically, the effect of terminal-level lifetime on pulse temporal behaviour is analysed. The mode is applied to the case of a diode-pumped Nd:YAG laser that is passively Q-switched by a Cr4+:YAG absorber. Theoretical results show good agreement with the experiments.
%K solid state laser
%K passive Q-switch
%K Cr4+:YAG absorber<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=366D0D9E7A5C46023AE86FB661F2BC99&yid=9377ED8094509821&vid=A04140E723CB732E&iid=38B194292C032A66&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=19