Passively mode-locked erbium-doped fiber laser via a D-shape-fiber-based MoS<sub>2</sub> saturable absorber with a very low nonsaturable loss

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

Optical spectrum (a), pulse shape (b), oscilloscope trace (c), and RF spectrum (d) of the mode-locked DS.