Passively mode-locked erbium-doped fiber laser via a D-shape-fiber-based MoS2 saturable absorber with a very low nonsaturable loss
Duan Li-Na, Su Yu-Long, Wang Yong-Gang†, 
, Li Lu, Wang Xi, Wang Yi-Shan
, Li Lu, Wang Xi, Wang Yi-Shan SEM image of MoS2 (a), the DF injected with visible light (b), the DF under microscope (c), the DF coated with MoS2 under microscope (d), and the measured saturable absorption curve of the MoS2-DF SA (e).
