Noise of a regeneratively synchronized GHz passively modelocked fiber laser

Summary form only given. Erbium-doped fiber lasers (EDFL) are attractive as high repetition rate (rep-rate) sources for many applications such as telecommunications and A-D converters. Passively modelocked lasers can provide short pulses but usually have low reprate. Though passive harmonic modelocking or external TDM can increase the rep-rate of such lasers, they require extensive stabilization and/or suffer from poor timing jitter and supermode suppression. Recently we have demonstrated that by incorporating phase modulation (PM) and additive pulse modelocking (APM) in an EDFL, 480 fs transform limited pulses at 1 GHz can be produced with >60 dB supermode suppression.