Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.8: Poster

Tuesday, March 18, 2014, 16:30–18:30, Spree-Palais

FPGA based coincidence counter for quantum optics experiments — •Irati Alonso Calafell, Amir Moqanaki, and Philip Walther — University of Vienna, Vienna, Austria

Coincidence counting is a widely used technique in quantum optics for spotting photon correlations. We present a simple FPGA based coincidence counter which allows determining coincidences in a limitless number of detectors by an easy and cheap implementation. In addition, signals can be lengthened or shortened according to the required coincidence window and delayed to correct photon path mismatch. This poster describes the general picture of the coincidence counter as well as the concept of the code written in VHDL. Performance and reliability of the FPGA based coincidence counter has been tested and compared to a circuit based version.