We report the observation of self-mode-locked laser pulses from in-lin
e coupled-cavity (ILCC) fiber lasers, consisting of an optically pumpe
d Er-doped fiber main cavity and an auxiliary Si fiber cavity formed b
y using three intra-core Bragg gratings, Mode-locked pulses at a repet
ition rate of 100 MHz have been obtained with an input pump threshold
as low as 10 mW.