title: Experimental evidence for Raman-induced limits to efficient squeezing in optical fibers.
abstract: We report new experiments on polarization squeezing using ultrashort photonic pulses in a single pass of a birefringent fiber. We measure what is to our knowledge a record squeezing of -6.8+/-0.3 dB in optical fibers, which when corrected for linear losses is -10.4+/-0.8 dB. The measured polarization squeezing as a function of optical pulse energy, which spans a wide range from 3.5-178.8 pJ, shows a very good agreement with the quantum simulations, and for the first time we see the proof experimentally that Raman effects limit and reduce squeezing at high pulse energy.
authors.affiliation: Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg,Günther-Scharowsky-Strasse 1, Bau 24, 91058 Erlangen, Germany. rdong@optik.uni-erlangen.de
authors.forename: Ruifang
authors.initials: R
authors.lastname: Dong
authors.forename: Joel
authors.initials: J
authors.lastname: Heersink
authors.forename: Joel F
authors.initials: JF
authors.lastname: Corney
authors.forename: Peter D
authors.initials: PD
authors.lastname: Drummond
authors.forename: Ulrik L
authors.initials: UL
authors.lastname: Andersen
authors.forename: Gerd
authors.initials: G
authors.lastname: Leuchs