▎ 摘　　要

NOVELTY - The laser has a pumping source (1) connected to a wavelength division multiplexer (2). A pump input end of the wavelength division multiplexer is connected to a common end of an optical fiber grating (3). Another end of the optical fiber grating is connected to one end of a co-doped fiber (4). Another end of the co-doped fiber is connected to a graphite saturable absorber (5). The graphite saturable absorber is formed between a linear laser cavity and laser modulation Q device and made from oxidized graphite alkene and graphite alkene polymer. USE - Graphene passive Q-nanosecond impulse fiber laser for a non-linear optical field. ADVANTAGE - The laser is easy to manufacture and inexpensive, and has wide saturable absorption spectrum range. The laser easily utilizes a graphene saturable absorber with wide industrial application range. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene passive Q-nanosecond impulse fiber laser.'(Drawing includes non-English language text)' Pumping source (1) Wavelength division multiplexer (2) Optical fiber grating (3) Co-doped fiber (4) Graphite saturable absorber (5)