摘要
稀土Er3+离子以其能级结构丰富、可产生多种辐射波长而受到广泛的研究,在4I11/2态和4I13/2态之间跃迁产生的辐射波长位于2.7～3μm范围内,中心波长2.79μm的激光由于其波长的特殊性,此类激光器在医疗、非线性光学以及军事等方面具有重要的应用价值。选择Er,Yb:GSGG作为产生2.79μm激光的增益介质,通过一组联立速率方程组可以精确地描述其激光特性,在Er3+-Yb3+能级跃迁结构图的基础上,构建了该能级跃迁速率方程理论模型,为研究光场与物质原子体系相互作用提供了有效的方法,且因其简单直观而广泛应用于激光器特性研究中。最后,在此模型基础上进行了一定的数值模拟。
Rare earth ion Er3＋ has been extensively studied since it can produce a wide range of wavelengths with its rich variety of energy level structure. 2.7-3 p,m stimulated emission has been obtained from transition （4I11/2-4113/2）, of which the central wavelength 2.79 p,m is useful for medical applications, pumping sources for infrared optical parametric oscillators and military. Er,Yb：GSGG was selected as gain material of 2.79 /xm laser, and the behavior of a laser could be described with the reasonable presicion by a set of coupled rate equation. Therefore, based on the Er~＋-Yba＋ energy-level diagrams, the rate-equation theory model of rate equation of Er3＋-Yb3＋ level transition was built. This model is an effective way to study the light field interacting with the material atoms. Moreover, it has been widely used in the study of laser behavior because it is so simple and intuitive. At last, a certain numerical simulation was done based on the model.
出处
《红外与激光工程》
EI
CSCD
北大核心
2012年第5期1168-1173,共6页
Infrared and Laser Engineering
