SELF-PULSING IN ER3+-DOPED FIBER LASER

The output intensity of an erbium-doped fibre laser was studied. Exper iments were performed with three pumping wavelengths: 514.5 nm, 810 nm and 980 nm. The laser output intensity exhibits three different dynam ical behaviours: steady-state, sinusoidal variation or self-pulsing. I n particular, in a bad (high-loss) cavity configuration, when the pump ing ratio is increased above the lasing threshold the output intensity changes continuously from a steady-state to an infinite train of puls es. We also show that, depending on the cavity configuration, the tran sient oscillations display different forms.