Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 41: Poster: Quantum Optics and Photonics II
Q 41.40: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik
Probing the modal structure of squeezed pulses via homodyne detection — •Thomas Dirmeier1,2, Johannes Tiedau3, Vahid Ansari3, Christine Silberhorn3, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max Planck Institut für die Physik des Lichts, Staudstr. 2, 91058 Erlangen — 2Institut für Optik, Information und Photonik, FAU Erlangen-Nürnberg, Staudstr. 7, 91058 Erlangen — 3Integrierte Quantenoptik, Angewandte Physik, Universität Paderborn, Warburgerstr. 100, 33098 Paderborn
Squeezed states are valuable resource states for quantum technologies stretching from metrology to information processing applications. In parametric down-conversion, they are often generated as states multimode in the time-frequency domain which makes separating and detecting them by ordinary optical techniques a challenge.
Optical homodyne detection, the method typically used to detect changes in the quadrature variances, is by its nature a mode-selective measurement procedure that only selects those parts of the modal spectrum that overlap with the signal field while being blind to all other modes. In our experiment, we use this feature to probe the time-frequency Schmidt mode distributions of squeezed fs pulses generated in a PPKTP waveguide down-conversion source at telecommunication frequencies. We use the unique tuning features of this source to generate pulses with varying Schmidt mode distributions and compare our homodyne results with the distributions retrieved from g(2)-measurements.