Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 41: Poster: Quantum Sensing

FM 41.14: Poster

Dienstag, 24. September 2019, 16:30–18:30, Tents

Modeling and simulation of SPDC sources for quantum imaging experiments — •Felix Riexinger1,2, Patricia Bickert1, Björn Haase1,2, Mirco Kutas1,2, Daniel Molter1, Michael Bortz1, and Georg von Freymann1,21Fraunhofer-Institute for Industrial Mathematics ITWM, Fraunhofer-Platz 1, 67663 Kaiserslautern, Germany — 2Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663 Kaiserslautern, Germany

Quantum imaging is a promising method to improve imaging applications in many sectors. Most setups use nonlinear crystals pumped in the low-gain regime as a source for entangled photons. We developed and implemented a general model for these SPDC sources, taking into account the finite extent of the crystal. This model allows us to explore the source characteristics without relying on certain approximations.

To allow for a comparison with the experimental spectra we also modeled the optical system of the experiment. The model agrees well with experimental results for various lithium niobate crystals pumped at 660nm. We applied our model to predict relevant quantities for imaging experiments, e.g., visibility and field of view.

Understanding the influence of the source parameters on the emitted photons allows for the design of optimal sources leading to improved imaging setups. Our work is an important step towards an improved development cycle for quantum imaging experiments and applications.

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