▎ 摘　　要

NOVELTY - The laser has a graphite film embedded in a connector. A thulium-doped fiber (3) and a polarization-maintaining optical fiber (7) are connected to a first polarization controller (5), where the polarization-maintaining optical fiber is connected with an end of a second polarization controller (8). A graphene mode-locked device (9) is connected with the optical fiber and an optical splitter (10) through a port (h). The optical fiber is connected with the graphene mode-locked device through a movable joint. The optical splitter is connected to the thulium-doped fiber. USE - 2.0-micron band passive mode-locked ultra-short optical fiber laser. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a 2.0-micron band passive mode-locked ultra-short optical fiber laser. Port (h) Thulium-doped fiber (3) Polarization controllers (5, 8) Polarization-maintaining optical fiber (7) Graphene mode-locked device (9) Optical splitter (10)