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Q: Fachverband Quantenoptik und Photonik
Q 29: Poster – Quantum Technologies I
Q 29.16: Poster
Tuesday, March 3, 2026, 17:00–19:00, Philo 2. OG
Improving the response of SNSPDs in high brightness environments — •Paul Vatter1, Niklas Lamberty1,2, Timon Schapeler1,2, and Tim Bartley1,2 — 1Department of Physics, Paderborn University, Warburger Str. 100, Paderborn, 33098, Germany — 2Institute for Photonic Quantum Systems (PhoQS), Paderborn University, Warburger Str. 100, Paderborn, 33098, Germany
Superconducting nanowire single-photon detectors (SNSPDs) offer great value as highly efficient single-photon counters and possess a high signal-to-noise ratio even in low-light environments. We investigate possible improvements in the optical response of SNSPDs by varying their efficiency. A lookup table was created, mapping the count rate of an SNSPD to the incoming light intensity and its efficiency, enabling the calculations of signal-to-noise ratios. This data set reveals how the count rate of SNSPDs transitions into plateau and saturation regions at high incoming light intensity. By characterizing the signal-to-noise ratio behaviour across different operating regimes, we quantify how SNSPDs perform at high incoming light intensity when reducing their detection efficiency. These results pave the way for deploying SNSPDs in a broader range of applications, including those involving high brightness environments.
Keywords: SNSPD; efficiency; signal-to-noise ratio; high-brightness