Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 74: Quantum Information: Quantum Communication III
Q 74.4: Talk
Friday, March 27, 2015, 15:15–15:30, K/HS1
Measuring squeezing produced by a type II KTP waveguide downconversion source — •Thomas Dirmeier1,2, Nitin Jain1,2, Georg Harder3, Vahid Ansari3, Gerd Leuchs1,2, Christoph Marquardt1,2, and Christine Silberhorn2,3 — 1Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Germany — 2Max Planck Institute for the Science of Light Erlangen, Germany — 3Applied Physics, Integrated Quantum Optics Group, University of Paderborn, Germany
Squeezed states of light are a basic resource for a number of continuous variable quantum protocols. A commonly used tool to generate such states are sources exploiting the parametric downconversion process as they combine compact source designs with a large number of tuning parameters. ppKTP-based waveguide sources have been shown to be reliable sources of photon pairs and squeezed vacuum states, showing both a well-controlled spatio-spectral mode structure and a reasonable energy efficiency. We present the characterization of our single-mode KTP source and the results of sideband homodyne measurements on the generated squeezed vacuum. Furthermore, we will discuss the progress on the pulse-to-pulse detection and possible applications.