supported by the Natural Science Foundation of Shandong Province(Nos.ZR2019MF047,ZR2020MF126,and ZR2019MF043).
Based on the Nd-doped single-mode fiber as the gain medium,an all-fiber 12th harmonic mode-locked(HML)laser operating at the 0.9μm waveband was obtained for the first time,to the best of our knowledge.A mandrel with ...