title: Observation of cw squeezed light at 1550 nm.
abstract: We report on the generation of cw squeezed vacuum states of light at the telecommunication wavelength of 1550 nm. The squeezed vacuum states were produced by type I optical parametric amplification in a standing-wave cavity built around a periodically poled potassium titanyl phosphate crystal. A nonclassical noise reduction of 5.3 dB below the shot noise was observed by means of balanced homodyne detection.
authors.affiliation: Max-Planck-Institut for Gravitationsphysik, Hannover, Germany.
authors.forename: Moritz
authors.initials: M
authors.lastname: Mehmet
authors.forename: Sebastian
authors.initials: S
authors.lastname: Steinlechner
authors.forename: Tobias
authors.initials: T
authors.lastname: Eberle
authors.forename: Henning
authors.initials: H
authors.lastname: Vahlbruch
authors.forename: André
authors.initials: A
authors.lastname: Thüring
authors.forename: Karsten
authors.initials: K
authors.lastname: Danzmann
authors.forename: Roman
authors.initials: R
authors.lastname: Schnabel