Modeling a Passively Q-Switched Nd:YVO4 Laser with an Application to Spatio-Temporal Instability

被引:4
作者
Wei, Ming-Dar [1 ]
机构
[1] Natl Cheng Kung Univ, Dept Electroopt Engn, Tainan 70101, Taiwan
关键词
ND-YAG LASER; SATURABLE ABSORBER; CHAOS; OSCILLATION; FREQUENCY; CRYSTAL;
D O I
10.1143/JJAP.49.072701
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this study, a numerical model of a passively Q-switched laser system to concerning the transverse distribution of the optical field is presented. Applying this numerical model to examine the dynamics of a passively Q-switched Nd:YVO4 laser with a Cr4+-doped yttrium aluminum garnet (Cr4+:YAG) saturable absorber, a spatio-temporal instability is evident when this laser is operated in the transverse degenerate configuration. The mechanism of instability is mainly governed by the transverse mode competition among the degenerate modes. Results of this study demonstrate that there are two bifurcating branches corresponding to the different spatio-temporal evolutions as the pump power increases. Moreover, each bifurcation is accompanied by the excitation of the higher-order degenerate transverse modes. (C) 2010 The Japan Society of Applied Physics
引用
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页码:0727011 / 0727015
页数:5
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