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Q: Fachverband Quantenoptik und Photonik

Q 56: Quanteninformation (Photonen und nichtklassisches Licht I)

Q 56.6: Talk

Friday, March 14, 2008, 12:15–12:30, 1A

Observation of polarization squeezing in PPKTP waveguides — Malte Avenhaus¹, Maria Chekhova², •Leonid Krivitsky¹, Gerd Leuchs¹, and Christine Silberhorn¹ — ¹University of Erlangen-Nurnberg, Institute for Optics Information and Photonics — ²M.V. Lomonosov Moscow State University

We study the experimental configuration of generation of polarization-squeezed states based on interference effect involving two nonlinear crystals. Our experiment represents a generalization of the well developed method of polarization-entangled state generation at the single photon level for the case of high parametric gain. The high gain regime is achieved by using an efficient source based on periodically poled KTP crystal waveguide pumped by a femtosecond laser. We show that the effect of polarization entanglement observed at a single photon level transforms in observation of polarization squeezing at a high gain regime.