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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster III
Q 42.33: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Implementation of a sub 10 ps RMS jitter TDC for Hanbury Brown Twiss measurements in Astronomy — •Verena Leopold1, Yury Prokazov2, Evgeny Trubin2, Stefan Richter1, and Joachim von Zanthier1 — 1FAU, Erlangen, Germany — 2Photonscore, Magdeburg, Germany
For Hanbury Brown Twiss measurements in Astronomy, it is crucial to detect photon arrival times very precisely from multiple detectors. Usually a TDC (Time-to-Digital- Converter) is used for recording this time stream. However, for these low contrast, long-running measurements, available TDCs show disadvantages. The main challenges are low quality analog inputs and non-linearities on short ps-timescales. We succesfully implemented a TDL (Tapped-Delay-Line) TDC inside an FPGA displaying a RMS jitter of (3.24 ± 0.03) ps with non-linearities on the order of 0.32%. As a next step the TDC will be tested in the lab before measuring a real star in Calern.