22 February 2018 Highly efficient router-based readout algorithm for single-photon-avalanche-diode imagers for time-correlated experiments
Author Affiliations +
Proceedings Volume 10539, Photonic Instrumentation Engineering V; 105390B (2018) https://doi.org/10.1117/12.2287794
Event: SPIE OPTO, 2018, San Francisco, California, United States
Time-Correlated Single Photon Counting (TCSPC) is a powerful tool that permits to record extremely fast optical signals with a precision down to few picoseconds. On the other hand, it is recognized as a relatively slow technique, especially when a large time-resolved image is acquired exploiting a single acquisition channel and a scanning system.

During the last years, much effort has been made towards the parallelization of many acquisition and conversion chains. In particular, the exploitation of Single-Photon Avalanche Diodes in standard CMOS technology has paved the way to the integration of thousands of independent channels on the same chip.

Unfortunately, the presence of a large number of detectors can give rise to a huge rate of events, which can easily lead to the saturation of the transfer rate toward the elaboration unit. As a result, a smart readout approach is needed to guarantee an efficient exploitation of the limited transfer bandwidth.

We recently introduced a novel readout architecture, aimed at maximizing the counting efficiency of the system in typical TCSPC measurements. It features a limited number of high-performance converters, which are shared with a much larger array, while a smart routing logic provides a dynamic multiplexing between the two parts.

Here we propose a novel routing algorithm, which exploits standard digital gates distributed among a large 32x32 array to ensure a dynamic connection between detectors and external time-measurement circuits.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Cominelli, G. Acconcia, F. Caldi, P. Peronio, M. Ghioni, I. Rech, "Highly efficient router-based readout algorithm for single-photon-avalanche-diode imagers for time-correlated experiments", Proc. SPIE 10539, Photonic Instrumentation Engineering V, 105390B (22 February 2018); doi: 10.1117/12.2287794; https://doi.org/10.1117/12.2287794


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