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30 May 2022 A novel 32x32 InP/ InGaAs SPAD array for multi-channel time-gated diffuse correlation spectroscopy
Marco Renna, Jonathan M. Richardson, George Jordy, Tom Cheng, Eric Ringdahl, Mitchell Robinson, Nisan Ozana, Niyom Lue, Brian Aull, Stefan Carp, Erik Duerr, Maria Angela Franceschini, Megan Blackwell
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Proceedings Volume PC12089, Advanced Photon Counting Techniques XVI; PC120890E (2022) https://doi.org/10.1117/12.2619112
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States
Abstract
We present the design of an innovative time-gated 32×32 InP/InGaAs-based Single Photon Avalanche Diode (SPAD) array with sub-nanosecond gating capabilities operating up to 10MHz repetition rate specifically designed for time-domain diffuse correlation spectroscopy at 1064nm. We present the detector design, experimental characterization and preliminary validations on a liquid phantom. This testing is informing us for a revision of the photodetector which will allow to reach up to 192 optical channels towards functional blood flow changes measurements with full head coverage with improved brain sensitivity thanks to early-photons rejection.
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Marco Renna, Jonathan M. Richardson, George Jordy, Tom Cheng, Eric Ringdahl, Mitchell Robinson, Nisan Ozana, Niyom Lue, Brian Aull, Stefan Carp, Erik Duerr, Maria Angela Franceschini, and Megan Blackwell "A novel 32x32 InP/ InGaAs SPAD array for multi-channel time-gated diffuse correlation spectroscopy", Proc. SPIE PC12089, Advanced Photon Counting Techniques XVI, PC120890E (30 May 2022); https://doi.org/10.1117/12.2619112
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KEYWORDS
Indium gallium arsenide
Photons
Sensors
Spectroscopes
Brain
Head
Imaging systems
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