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Proceedings Paper

Development and characterization of an 8x8 SPAD-array module for gigacount per second applications
Author(s): Francesco Ceccarelli; Angelo Gulinatti; Ivan Labanca; Ivan Rech; Massimo Ghioni
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Paper Abstract

In recent years the development of Single-Photon Avalanche Diodes (SPADs) had a big impact on single-photon counting applications requiring high-performance detectors in terms of Dark Count Rate (DCR), Photon Detection Efficiency (PDE), afterpulsing probability, etc. Among these, it is possible to find applications in singlemolecule fluorescence spectroscopy that suffer from long-time measurements. In these cases SPAD arrays can be a solution in order to shorten the measurement time, thanks to the high grade of parallelism they can provide. Moreover, applications in other fields (e.g. astronomy) demand for large-area single-photon detectors, able also to handle very high count rates. For these reasons we developed a new single-photon detection module, featuring an 8×8 SPAD array. Thanks to a dedicated silicon technology, the performance of the detector have been finely optimized, reaching a 49% detection efficiency at 550 nm, as well as low dark counts (2 kcount/s maximum all over the array). This module can be used in two different modes: the first is a multi-spot configuration, allowing the acquisition of 64 optical signals at the same time and considerably reducing the time needed for a measurement. The second operation mode instead exploits all the pixels in a combined mode, allowing the detection of a 64-times higher maximum photon rate (up to 2 Gcount/s). In addition, this configuration provides also an extended dynamic range and allows to attain photon number resolving capabilities. Dark counts, detection efficiency, linearity, afterpulsing and crosstalk probability have been characterized at different operating conditions.

Paper Details

Date Published: 15 May 2017
PDF: 9 pages
Proc. SPIE 10229, Photon Counting Applications 2017, 102290E (15 May 2017); doi: 10.1117/12.2265785
Show Author Affiliations
Francesco Ceccarelli, Politecnico di Milano (Italy)
Angelo Gulinatti, Politecnico di Milano (Italy)
Ivan Labanca, Politecnico di Milano (Italy)
Ivan Rech, Politecnico di Milano (Italy)
Massimo Ghioni, Politecnico di Milano (Italy)
Micro Photon Devices S.r.l. (Italy)


Published in SPIE Proceedings Vol. 10229:
Photon Counting Applications 2017
Ivan Prochazka; Roman Sobolewski; Ralph B. James, Editor(s)

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