Dark–bright solitons within an erbium-doped fiber laser based on Cr 2 Ge 2 Te 6 saturable absorber

and studied its morphological and optical properties. As far as we know, the stable dark-bright soliton was generated by an erbium-doped fiber laser based on CGT SA for the first time. That indicates the CGT SA has great potential for investigating the mechanism of dark-bright solitons.