“…The research on mid-infrared (mid-IR) supercontinuum (SC) sources has drawn worldwide attention because of their great application potential in many areas such as spectroscopy [1], frequency metrology [2], remote sensing [3], and atom physics [4]. In the past decades, SC generation in silica glass fibers [5][6][7][8][9][10][11][12][13], especially in silica photonic crystal fibers (PCFs) [9][10][11][12][13], has been extensively studied due to the controllable dispersion property and low propagation loss in visible and near-IR regions. Soft glass optical fibers with high nonlinearity and low propagation loss in the mid-IR region, such as chalcogenide [14][15][16][17], tellurite [18][19][20], and fluoride [21][22][23][24][25][26][27][28][29] glasses, are needed for generating mid-IR SC.…”