▎ 摘　　要

NOVELTY - The laser has a pumping source (1) connected with a wavelength division multiplex optical fiber coupler (2) that is connected with a gain fiber (3). An end part of the gain fiber is connected with an output coupler (4). A single-mode optical fiber (5) is connected with an input end of a circulator (6). A graphite saturable absorber (7) is connected with an annular device. An end of the circulator is connected with a polarization controller (8) that is connected with a multiplex optical fiber coupler of the wavelength division multiplex optical fiber coupler. USE - Graphene passive mode-locked fiber laser. ADVANTAGE - The laser avoids additional external modulation source so as to realize high stability, high power, high energy and high efficiency of ultra-short pulse laser output. The laser has inexpensive production, saturable absorption spectrum range and high practical mold device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene passive mode-locked fiber laser. Pumping source (1) Wavelength division multiplex optical fiber coupler (2) Gain fiber (3) Output coupler (4) Single-mode optical fiber (5) Circulator (6) Graphite saturable absorber (7) Polarization controller (8)