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Q: Fachverband Quantenoptik und Photonik

Q 23: Quanteninformation: Photonen II

Q 23.3: Vortrag

Dienstag, 3. März 2009, 14:30–14:45, VMP 6 HS-D

A Novel Method for Polarization Squeezing and Polarization Entanglement with Photonic Crystal Fibers — •Josip Milanovic¹, Mikael Lassen^1,2, Christoph Marquardt¹, Ulrik L. Andersen^1,2, and Gerd Leuchs¹ — ¹Max Planck Institute for the Science of Light, University of Erlangen-Nuremberg, Guenther-Scharowsky-Str. 1, 91058 Erlangen, Germany — ²Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark

Photonic Crystal Fibers (PCF) can be tailored to introduce a high nonlinear Kerr effect likewise showing that it is possible to create lower amounts of excess noise compared to standard fibers. Taking advantage of these features and using ultrashort pulses we create polarization squeezed states with notably higher purity than obtained in standard fibers. The squeezed states are produced by pulses of equal polarization counter propagating along the same fiber axis undergoing nearly identical spectral and temporal changes. Overlapping these pulses in modes of mutually orthogonal polarization enables the production of polarization squeezing. By exploiting both polarization axes of the polarization maintaining PCF we can generate two independent polarization squeezed beams thereby creating polarization entanglement. We present results of the PCF squeezer and discuss the progress in creating entanglement with this novel setup.