Effect of a codoped interface layer on passively Q-switched laser performance of composite crystals.
Effect of a codoped interface layer on passively Q-switched laser performance of composite crystals.
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DOI：
10.1364/ao.55.006516
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发表时间：
2016-08
期刊：
影响因子：
1.9
通讯作者：
Jie Xu;J. Dong
中科院分区：
文献类型：
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作者：
Jie Xu;J. Dong
采用合适的激光晶体组合，模拟了具有界面层的Yb：YAG/Cr4+：YAG复合晶体。首次研究了界面层对Yb：YAG/Cr4+：YAG复合晶体激光性能的影响。Yb：YAG/Cr4+：YAG复合晶体中界面层的形成对平均输出功率、光学效率以及单脉冲能量和峰值功率都有不利的影响。此外，Cr，Yb：YAG界面层还导致强模式竞争，导致纵模数目减少，纵模间隔变宽，激光脉冲串稳定性变差。研究结果对研制新型Yb：YAG/Cr4+：YAG复合晶体，获得高峰值功率和高光学效率的激光脉冲具有重要的理论和实际意义。
By using combinations of appropriate laser crystals, we simulated a Yb:YAG/Cr4+:YAG composite crystal with a Cr,Yb:YAG interface layer. The effect of the Cr,Yb:YAG interface layer on the laser performance of the Yb:YAG/Cr4+:YAG composite crystal has been investigated for the first time to our best knowledge. The formation of the Cr,Yb:YAG interface layer in the Yb:YAG/Cr4+:YAG composite crystal has a negative impact on average output power, optical efficiency, as well as single pulse energy and peak power. In addition, the Cr,Yb:YAG interface layer also leads to strong mode competition, resulting in the decrease of the longitudinal mode number, the widening of longitudinal mode separations, and the poor stability of laser pulse trains. The results of this study are of theoretical and practical importance to develop novel Yb:YAG/Cr4+:YAG composite crystals that could be used to obtain laser pulses with high peak power and high optical efficiency.