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Experimental verification of high spectral entanglement for pulsed waveguided spontaneous parametric down-conversion

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Avenhaus,  Malte
Silberhorn Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Chekhova,  Maria V.
Quantum Radiation, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;
Chekhova Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Optical Technologies, Technology Development and Service Units, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs,  Gerd
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Silberhorn,  Christine
Silberhorn Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Avenhaus, M., Chekhova, M. V., Krivitsky, L. A., Leuchs, G., & Silberhorn, C. (2009). Experimental verification of high spectral entanglement for pulsed waveguided spontaneous parametric down-conversion. PHYSICAL REVIEW A, 79(4): 043836. doi:10.1103/PhysRevA.79.043836.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6BFF-6
Abstract
We study the spectral properties of spontaneous parametric down-conversion (SPDC) in a periodically poled waveguided structure of potassium-titanyl-phosphate (KTP) crystal pumped by ultrashort pulses. Our theoretical analysis reveals a strongly entangled and asymmetric structure of the two-photon spectral amplitude for type-II SPDC. We confirm these predictions experimentally by measuring single-photon spectra, on one hand, and the dependence of Hong-Ou-Mandel interference visibility on the width of spectral filtering, on the other hand.