Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 41: Poster: Quantum Sensing

FM 41.13: Poster

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

Characterisation of wavelength-shifted Photon Pairs for Quantum Imaging Applications — •Florian Herbst1, Florian Elsen2, Bernd Jungbluth2, Hans-Dieter Hoffmann2, and Reinhart Poprawe1,21Chair for Laser Technology RWTH Aachen University, Aachen, Germany — 2Fraunhofer Institute for Laser Technology, Aachen, Germany

The mid-infrared spectral range (MIR) is gaining more and more importance for analytics and research, e.g. via spectroscopy and imaging applications. Such techniques usually require both photon generation and photon detection. By utilising spontaneous parametric down-conversion (SPDC), G. B. Lemos et al. (Nature, 2014) have demonstrated the feasibility of imaging with undetected photons. This even allows for imaging in spectral ranges for which detectors are not available. While many previous works that employed this scheme relied on visible (VIS) and near-infrared (NIR) photons, we aim to expand this scheme by using MIR photons instead of NIR ones. For this, our investigations started by examining emission properties of wavelength-shifted photon pairs generated from SPDC in the experimentally easily accessible regime of VIS and NIR, focussing on time-wise correlations. This source was then used to build an NIR-imaging device. With investigations going on, these setups serve as benchmarks for the prospective SPDC-based MIR-imaging prototype.

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