Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.27: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG2

Demonstration of an all digital optical phase-lock for precision measurements. — •Alexandros Papakonstantinou, Thijs Wendrich, Wolfgang Bartosch, Ernst Rasel, and Wolfgang Ertmer — Institut für Quantenoptik, Universität Hannover

For many applications in quantum optics involving for example an atom interferometer, one will need lasers with a precise phase relation. The residual phase noise transfers directly to the performance of an atom interferometer. In this poster we present an all-digital optical phase-lock implemented in an FPGA. The FPGA receives a pre-scaled beat signal between two lasers and outputs an analog signal that directly drives the laser. Its firmware includes the phase frequency detector as well as the loop filter and enables an easy, software based, optimization of loop parameters for best performance in different tasks. This new phase-lock technique can enable phase-locks for tasks in quantum optics that previously used less advanced techniques, and can be used to further improve experiments like the MAIUS missions.

This work is part of the Quantus/Maius project which is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economic Affairs and Energy (BMWi) under grant number 50WM1239.