title: Mode locking of an all-fiber laser by acousto-optic superlattice modulation.
abstract: Active mode locking of an erbium-doped all-fiber laser with a Bragg-grating-based acousto-optic modulator is demonstrated. The fiber Bragg grating was acoustically modulated by a standing longitudinal elastic wave, which periodically modulates the sidebands at twice the acoustic frequency. The laser has a Fabry-Perot configuration in which cavity loss modulation is achieved by tuning the output fiber Bragg grating to one of the acoustically induced sidebands. Optical pulses at 9 MHz repetition rate, 120 mW peak power, and 780 ps temporal width were obtained. The output results to be stable and has a timing jitter below 40 ps. The measured linewidth, 2.8 pm, demonstrates that these pulses are transform limited.
authors.affiliation: Departamento de Física Aplicada y Electromagnetismo, ICMUV, Universidad de Valencia, Valencia, Spain. Christian.Cuadrado@uv.es
authors.forename: C
authors.initials: C
authors.lastname: Cuadrado-Laborde
authors.forename: A
authors.initials: A
authors.lastname: Diez
authors.forename: M
authors.initials: M
authors.lastname: Delgado-Pinar
authors.forename: J L
authors.initials: JL
authors.lastname: Cruz
authors.forename: M V
authors.initials: MV
authors.lastname: Andrés