title: Raman-Free, Noble-Gas-Filled Photonic-Crystal Fiber Source for Ultrafast, Very Bright Twin-Beam Squeezed Vacuum.
abstract: We report a novel source of twin beams based on modulational instability in high-pressure argon-filled hollow-core kagome-style photonic-crystal fiber. The source is Raman-free and manifests strong photon-number correlations for femtosecond pulses of squeezed vacuum with a record brightness of ∼2500 photons per mode. The ultra-broadband (∼50  THz) twin beams are frequency tunable and contain one spatial and less than 5 frequency modes. The presented source outperforms all previously reported squeezed-vacuum twin-beam sources in terms of brightness and low mode content.
authors.affiliation: Max Planck Institute for the Science of Light, Bau 24, 91058 Erlangen, Germany.
authors.forename: Martin A
authors.initials: MA
authors.lastname: Finger
authors.affiliation: Max Planck Institute for the Science of Light, Bau 24, 91058 Erlangen, Germany.
authors.forename: Timur Sh
authors.initials: TSh
authors.lastname: Iskhakov
authors.affiliation: Max Planck Institute for the Science of Light, Bau 24, 91058 Erlangen, Germany.|Department of Physics, University of Erlangen-Nuremberg, Guenther-Scharowsky Strasse 1, Bau 24, 91058 Erlangen, Germany.
authors.forename: Nicolas Y
authors.initials: NY
authors.lastname: Joly
authors.affiliation: Max Planck Institute for the Science of Light, Bau 24, 91058 Erlangen, Germany.|Department of Physics, University of Erlangen-Nuremberg, Guenther-Scharowsky Strasse 1, Bau 24, 91058 Erlangen, Germany.|Physics Department, Lomonosov Moscow State University, Moscow 119991, Russia.
authors.forename: Maria V
authors.initials: MV
authors.lastname: Chekhova
authors.affiliation: Max Planck Institute for the Science of Light, Bau 24, 91058 Erlangen, Germany.|Department of Physics, University of Erlangen-Nuremberg, Guenther-Scharowsky Strasse 1, Bau 24, 91058 Erlangen, Germany.
authors.forename: Philip St J
authors.initials: PS
authors.lastname: Russell