Numerical Modeling of $3.5~ {\mu }\text{m}$ Dual-Wavelength Pumped Erbium-Doped Mid-Infrared Fiber Lasers

The performance of mid-infrared Er
³⁺
-doped fiber lasers has dramatically improved in the last few years. In this paper, we present a numerical model that provides valuable insight into the dynamics of a dual-wavelength pumped fiber laser that can operate on the 3.5and 2.8-μm bands. This model is a much needed tool for optimizing and understanding the performance of these laser systems. Comparisons between simulation and experimental results for three different systems are presented.