A passively mode-locked fiber ring laser (LAS) is disclosed for generating optical pulses whose repetition frequency is settable. The mode-locked fiber ring laser (LAS) contains an erbium-doped fiber (ER), a ring resonator (RES), a pump-light source (PUMP), an optical modulator (MOD), and a feedback...http://www.google.fr/patents/US5546414?utm_source=gb-gplus-shareBrevet US5546414 - Mode-locked fiber ring laser
