Year: 2025
Type: preprint
Abstract: SPAD arrays are becoming a popular choice for measuring two-photon interference effects thanks to their high timing precision, fast readout, and high quantum efficiency. However, such sensors are affected by cross-talk that may mimic the useful signal. Even with a low probability of seeing cross-talk effect between neighboring SPADs, it was found that it still may reach the farther channels up to a half of millimeter away. Moreover, the use of microlenses that help SPADs achieve even better efficiency further boosts the cross-talk effect. In this work, we characterize the cross-talk effect and compare it to the Hanbury Brown-Twiss effect in the LinoSPAD2 camera, which has a linear sensor of 512 SPADs. Additionally, we compare the results between sensors with and without the microlenses. Finally, we present a timing calibration technique for the detector that utilizes the cross-talk effect.
Source: arXiv (Cornell University)
Authors: Kulkov, Sergei, Radmacherova, Lada, Matousek, Ondrej, De Sousa, Lou-Ann Pestana, Bernasconi, Ermanno, Bruschini, Claudio, Milanese, Tommaso, Charbon, Edoardo, Nomerotski, Andrei, Svihra, Peter
Language: English
Subfield: Instrumentation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6979269132
Cites:
Cited by:
Related to: