Stretched-pulse Kerr Mode-locked Generation in Erbium-doped Ring Laser with Highly Nonlinear All-fiber Resonator

We obtained stretched pulse generation with 12 MHz repetition rate, average output power 16.7 mW and 48.1 nm spectral pulse width in the All-fiber Kerr Mode-locked Erbium-doped Ring Laser with a high nonlinear fiber inside the resonator with slightly positive net-cavity GVD.