We report the first characterization results of an optical time-stamping camera based on the Timepix4 chip coupled to a fully depleted optical silicon sensor and fast image intensifier, enabling sub-nanosecond scale, time-resolved imaging for single photons. The system achieves an RMS time resolution of 0.3 ns in direct detection mode without the intensifier and from 0.6 to 1.5 ns in the single-photon regime with an intensifier for different amplitude-based signal selections. This shows that Timepix4 provides a significant improvement over previous Timepix3-based cameras in terms of timing precision, and also in pixel count and data throughput. We analyze key factors that affect performance, including sensor bias and timewalk effect, and demonstrate effective correction methods to recover high temporal accuracy. The camera's temporal resolution, event-driven readout and high rate capability make it a scalable platform for a wide range of applications, including quantum optics, ultrafast imaging, and time-correlated photon counting experiments.
@article{arxiv.2509.14649,
title = {Intensified optical camera with Timepix4 readout},
author = {Erik Hogenbirk and Andrei Nomerotski and Bram Bouwens and Gabriel Diaz and Shazia Farooq and Sergei Kulkov and Erik Maddox and Ondrej Matousek and Peter Svihra and Henrique Zanoli},
journal= {arXiv preprint arXiv:2509.14649},
year = {2025}
}