title: Ultrashort pulses from an all-fiber ring laser incorporating a pair of chirped fiber Bragg gratings.
abstract: By incorporating two linearly chirped ultrabroadband fiber Bragg gratings of opposite dispersion in an all-fiber ring laser, we demonstrate a mode-locking regime in which a femtosecond pulse evolving in the normal dispersion gain segment is locally transformed into a highly chirped picosecond pulse that propagates in the remaining section of the cavity. By minimizing nonlinear effects and avoiding soliton pulse shaping in this anomalous-dispersion section, low repetition rate fiber lasers can be made to produce high-energy ultrashort pulses. Using this approach, 98 fs pulses with 0.96 nJ of energy are obtained from an erbium-doped fiber laser operated in the highly anomalous dispersion regime at a repetition rate of 9.4 MHz.
authors.forename: Simon
authors.initials: S
authors.lastname: Duval
authors.forename: Michel
authors.initials: M
authors.lastname: Olivier
authors.forename: Martin
authors.initials: M
authors.lastname: Bernier
authors.forename: Réal
authors.initials: R
authors.lastname: Vallée
authors.forename: Michel
authors.initials: M
authors.lastname: Piché