Erlangen 2018 – scientific programme

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MO: Fachverband Molekülphysik

MO 22: Posters 3: Experimental and Theoretical Techniques and High Resolution Spectroscopy

MO 22.2: Poster

Thursday, March 8, 2018, 16:15–18:15, Zelt West

Cost effective time-to-digital and high repetition rate boxcar averager for efficient signal processing — •Daniel Uhl, Lukas Bruder, Vladyslav Tyzhnevyi, Kambiz Mahboubi, and Frank Stienkemeier — Physikalisches Institut, Universität Freiburg, Hermann-Herder Str. 3, 79104 Freiburg

The development in ultrafast spectroscopy generally tends towards higher laser repetition rates (>100kHz), which requires fast signal processing. Many measurement schemes require boxcar averagers to isolate the spectroscopic signatures of interest. Commercially available devices for high repetition rates are, however, expensive. Likewise, digitizing signal traces, e.g. time-of-flight (TOF) traces, require typically fast (≥ 1GSa/s), fairly expensive digitizers. In addition, fully digitized traces often contain redundant information (many zeros) but produce large datasets that are impractical for real-time signal processing. Here, time-to-digital converters (TDC) provide an optimal solution. We are developing a combined cost-effective solution for TDC and boxcar applications implemented in a field programmable gate array (FPGA). Our device provides TDC with high timing precision and multiple hit modus, as well as a boxcar averager with a high repetition rate and multiple gates.