title: Subpicosecond pulse generation from a 1.56 μm mode-locked VECSEL.
abstract: Near-transform-limited subpicosecond pulses at 1.56 μm were generated from an optically pumped InP-based vertical-external-cavity surface-emitting laser (VECSEL) passively mode-locked at 2 GHz repetition rate with a fast InGaAsNSb/GaAs semiconductor saturable absorber mirror (SESAM). The SESAM microcavity resonance was adjusted via a selective etching of phase layers specifically designed to control the magnitude of both the modulation depth and the intracavity group delay dispersion of the SESAM. Using the same VECSEL chip, we observed that the mode-locked pulse duration could be reduced from several picoseconds to less than 1 ps with a detuned resonant SESAM.
authors.affiliation: Laboratoire de Photonique et de Nanostructures, LPN-CNRS, Marcoussis, France. zhuang.zhao@lpn.cnrs.fr
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Zhao
authors.forename: Sophie
authors.initials: S
authors.lastname: Bouchoule
authors.forename: Jinyan
authors.initials: J
authors.lastname: Song
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Galopin
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Harmand
authors.forename: Jean
authors.initials: J
authors.lastname: Decobert
authors.forename: Guy
authors.initials: G
authors.lastname: Aubin
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Oudar