title: Generation of <7 fs pulses at 800 nm from a blue-pumped optical parametric amplifier at degeneracy.
abstract: We generate ultrabroadband pulses at 800 nm from an optical parametric amplifier (OPA) pumped by the second harmonic of a Ti:sapphire system and working at degeneracy. The OPA is seeded by a white-light continuum generated from a near-IR OPA pumped by the same laser. Nearly transform-limited <7 fs pulses, fully characterized in amplitude and phase, are obtained with a chirped mirror compressor. The system fills the gap around 800 nm for broadband continuum seeded OPAs pumped by Ti:sapphire-based sources.
authors.affiliation: Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: A M
authors.initials: AM
authors.lastname: Siddiqui
authors.forename: G
authors.initials: G
authors.lastname: Cirmi
authors.forename: D
authors.initials: D
authors.lastname: Brida
authors.forename: F X
authors.initials: FX
authors.lastname: Kärtner
authors.forename: G
authors.initials: G
authors.lastname: Cerullo