Large-mode area (LAM) fibers with high NA have been widely applied into thermal image, laser power delivery, and supercontinuum generation 1-4 due to their increased light coupling ability and enhanced power transmitting threshold. Additionally, their wider core can significantly reduce the impact of nonlinear effects in mid-infrared (MIR) laser transmission that would deteriorate their handing capability of laser delivery. 5,6 Moreover, LMA fibers can effectively restrain the amplified spontaneous emission in laser transmission. 7 Therefore, many laser delivery systems 8-10 need LAM fibers with high NA to increase the fiber power threshold. Currently, many glasses including silica, 11 fluoride, 12 and chalcogenide 13 are introduced to develop LAM fibers for mid-infrared high-power laser transmission. However, the silica-based fiber is disabled because of its strong fundamental vibration absorption in mid-infrared. For fluoride