title: Electric field sampling of modelocked pulses from a quantum cascade laser.
abstract: We measure the electric field of a train of modelocked pulses from a quantum cascade laser in the time-domain by electro-optic sampling. The method relies on synchronizing the modelocked pulses to a reference laser and is applied to 15-ps pulses generated by a 2-THz quantum cascade laser. The pulses from the actively modelocked laser are completely characterized in field and in time with a sub-ps resolution, allowing us to determine the amplitude and phase of each cavity mode. The technique can also give access to the carrier-envelope phase of each pulse.
authors.affiliation: Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS (UMR 8551), Université P. et M. Curie, Université D. Diderot, 75231 Paris Cedex 05, France. freeman@lpa.ens.fr
authors.forename: Joshua R
authors.initials: JR
authors.lastname: Freeman
authors.forename: Jean
authors.initials: J
authors.lastname: Maysonnave
authors.forename: Harvey E
authors.initials: HE
authors.lastname: Beere
authors.forename: David A
authors.initials: DA
authors.lastname: Ritchie
authors.forename: Jérôme
authors.initials: J
authors.lastname: Tignon
authors.forename: Sukhdeep S
authors.initials: SS
authors.lastname: Dhillon