Passive mode locking with an active nonlinear directional coupler: positive group-velocity dispersion.
We show that the active nonlinear coupler laser proposed by us can produce picosecond pulse trains trains in dual-core fiber lasers with positive group-velocity dispersion. These pulses are accurately described by a linearly chirped soliton profile. The linear chrip should make it possible to obtain subpicosecond pulses widths through extracavity chirp compensation.
D T
DT
Walton
H G
HG
Winful