  We have experimentally demonstrated the all-fiber generation of 1.3-{\mu}m
femtosecond pulses via Cherenkov radiation (CR) from an ultrafast Er-doped
fiber laser. The experiment shows that the pulses maintain below 40 fs in the
range from 1270 to 1315 nm with multi-milliwatt average output power. The
shortest generated pulses can be as short as 29 fs. This ultrashort pulse
source in 1.3-{\mu}m window can bring the benefits to many fields such as the
bio-imaging and the ultrafast spectroscopy, and so on.
