title: 3 dB squeezing by single-pass parametric amplification in a periodically poled KTiOPO4 crystal.
abstract: We present the experimental observation of pulsed squeezed light from a degenerate optical parametric amplifier pumped by a second harmonic of a continuous-wave mode-locked Nd:YVO4 laser. With a single pass through a 10 mm long periodically poled KTiOPO4 crystal, the classical parametric gain of 11 is observed. The measured noise reduction in the quiet quadrature is 3.2 dB below the shot-noise level.
authors.affiliation: Department of Physics, Gokushuin University, Toshima-ku, Tokyo 171-8588, Japan. Takuya.Hirano@gakushuin.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Hirano
authors.forename: K
authors.initials: K
authors.lastname: Kotani
authors.forename: T
authors.initials: T
authors.lastname: Ishibashi
authors.forename: S
authors.initials: S
authors.lastname: Okude
authors.forename: T
authors.initials: T
authors.lastname: Kuwamoto