%0 Journal Article %T Numerical Study on the Soliton Mode-Locking of the Er3+-Doped Fluoride Fiber Laser at ~3 ¦Ìm with Nonlinear Polarization Rotation %J Photonics | An Open Access Journal from MDPI %D 2019 %R https://doi.org/10.3390/photonics6010025 %X Recent interest in the application of mid-infrared (mid-IR) lasers has made the generation of ~3 ¦Ìm ultrafast pulses a hot topic. Recently, the generation of femtosecond-scale pulses in Er 3+-doped fluoride fiber lasers has been realized by nonlinear polarization rotation (NPR). However, a numerical study on these fiber lasers has not been reported yet. In this work, the output properties of the NPR passively mode-locked Er 3+-doped fluoride fiber ring laser in ~3 ¦Ìm have been numerically investigated based on the coupled Ginzburg¨CLandu equation. The simulation results indicate that stable uniform solitons (0.75 nJ) with the pulse duration of femtosecond-scale can be generated from this fiber laser. This numerical investigation can provide some reference for developing the high energy femtosecond soliton fiber lasers in the mid-IR. View Full-Tex %U https://www.mdpi.com/2304-6732/6/1/25