In this study, a fluorotellurite glass fiber with relatively good thermal and chemical stability was developed. Using this glass fiber as a nonlinear medium, the broadband supercontinuum (SC) generation of 0.6-5.4 μm was experimentally obtained. An SC light source with an average power of about 20 W and a spectral range of 1-4 μm was also obtained. This study mainly focuses on the recent progress on the high-power mid-infrared SC light sources, including the material characteristics of fluoride glass fibers and fluorotellurite glass fibers and the SC laser sources based on the former. The future development of such SC laser sources is prospected.