Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.27: Poster

Thursday, March 26, 2015, 17:00–19:00, C/Foyer

Digital high bandwidth controller for optical traps — •Florian Seidler — Institut für Angewandte Physik, Uni Bonn

Trapped single atoms and atomic ensembles represent a versatile platform for the investigation and application of quantum physics with an extraordinary level of control. One key component to realize coherent manipulation of neutral atoms are versatile control devices. We report on the development of a digital high bandwidth (8 MHz) controller to control optical potentials.

Many parts of control loops used in our research (e.g. AOMs) show nonlinear behaviour that cannot be optimally controlled by inherently linear PID controllers. It requires a great effort to tailor an analog solution to a specific nonlinear control problem. Digital controllers using FPGAs can implement these solutions more easily and rapidly and can be adapted to completely different applications by simply changing the programming. Therefore they might prove superior in many cases.