  We experimentally demonstrated a high-order optical vortex pulsed laser based
on a mode selective all-fiber fused coupler composed of a single-mode fiber
(SMF) and a few-mode fiber (FMF). The fused SMF-FMF coupler inserted in the
cavity not only acts as mode converter from LP01 mode to LP11 or LP21 modes
with a broadband width over 100 nm, but also directly delivers femtosecond
vortex pulses out of the mode locked cavity. To the best of our knowledge, this
is the first report on the generation of high-order pulse vortex beams in
mode-locked fiber laser. The generated 140 femtosecond vortex beam has a
spectral width of 67 nm centered at 1544 nm.
