title: Observation of quadrature squeezing in a chi2 nonlinear waveguide using a temporally shaped local oscillator pulse.
abstract: We report on the generation of quadrature squeezed light at 1.535 microm via single-pass optical parametric amplification in a periodically poled MgO:LiNbO(3) waveguide, and detection with a temporally shaped local oscillator. Squeezing of -4.1 dB was directly measured using the shaped local oscillator. Classical parametric gain of the shaped pulse was also investigated; a deamplification gain of -12.1 dB was observed with the amplification gain of only +13.8 dB. We experimentally show that the use of shaped pulse as local oscillator in homodyne detection allows us efficient squeezing detection with near-unit mode-matching efficiency.
authors.affiliation: CREST Research Team for Photonic Quantum Information, Department of Physics, Gakushuin University, Mejiro 1-5-1, Toshima-ku, Tokyo, 171-8588, Japan. eto@qo.phys.gakushuin.ac.jp
authors.forename: Yujiro
authors.initials: Y
authors.lastname: Eto
authors.forename: Takashi
authors.initials: T
authors.lastname: Tajima
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Takuya
authors.initials: T
authors.lastname: Hirano