Frankfurt 2006 – scientific programme

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Q: Quantenoptik und Photonik

Q 76: Poster Quantenkommunikation

Q 76.6: Poster

Thursday, March 16, 2006, 16:30–18:30, Labsaal

STOKES PARAMETER SQUEEZING IN PHOTONIC CRYSTAL FIBERS — •Josip Milanovic, Ch. Marquardt, J. Heersink, U.L. Andersen, and G. Leuchs — Institute of Optics, Information and Photonics, Max Planck Research Group, University of Erlangen-Nuremberg, Guenther-Scharowsky-Str. 1, 91058 Erlangen

We report the generation of squeezing at 800nm of continuous variable Stokes parameters, i.e. polarization squeezing using a single pass through a photonic crystal fiber (PCF) exploiting the Kerr non-linearity. Squeezing in this case means that the variance of one of the Stokes operators is below the quantum noise limit. This is verified by a Stokes parameter measurement. Because it is an intensity dependent effect we use intense ultra short pulses (120 fs at 810 nm) in our experiments. A similar experiment has been performed at a different wavelength (1500 nm) using a standard step-index fiber (1). In our experiment, new features of the PCF are to be investigated especially the larger non-linearity compared to a standard step-index fiber. The choice of the wavelength is motivated by photodiodes with higher quantum efficiency and therefore better detection efficiency and nearby atomic transitions of alkali atoms.

References: (1) Joel Heersink et al., OPTICS LETTERS / Vol. 30, No. 10 / May 15, (2005)