  We fabricate a saturable absorber mirror by coating a graphene film on an
output coupler mirror. This is then used to obtain Q-switched mode-locking from
a diode pumped linear cavity waveguide laser inscribed in Ytterbium-doped
Bismuthate Glass, with high slope and optical conversion efficiencies. The
laser produces mode-locked pulses at 1039nm, with 1.5GHz repetition rate at an
average 202mW output power. This performance is due to the combination of the
graphene saturable absorber with the high quality laser glass.
