Abstract

A theoretical study of the spectroscopic properties of the low-phonon LaF₃:Er³⁺ crystals determining their laser capabilities in the mid-infrared wavelength range (2.62–4.97 μm) was carried out. The wave functions of the Stark sublevels of ⁴S_3/2, ⁴F_9/2, ⁴I_9/2, ⁴I_11/2, and ⁴I_13/2 of Er³⁺ ion are constructed by the LSJM-representation. The line strengths of the indirect electric dipole and magnetic dipole inter-Stark transitions are computed and the main spectroscopic and kinetic characteristics of the optical spectrum of the impurity ion are determined.

中文翻译：

---

LaF 3：Er 3+晶体的MIR激光器级联操作的光谱能力

摘要

对低声子LaF ₃：Er ³⁺晶体的光谱性质进行了理论研究，确定了它们在中红外波长范围（2.62-4.97μm）中的激光能力。斯塔克能级的波函数⁴小号_3/2，⁴ ˚F _9/2，⁴余_9/2，⁴我_11/2，和⁴我_13/2铒³⁺离子由LSJM表示构造。计算了间接电偶极子和磁偶极子之间的Stark跃迁的线强度，并确定了杂质离子光谱的主要光谱和动力学特性。