Fast-Gated 16 × 1 SPAD Array for Non-Line-of-Sight Imaging Applications
Abstract
In this paper we present a novel single-photon detector specifically designed for Non-Line-Of-Sight (NLOS) imaging applications within the framework of the DARPA REVEAL program. The instrument is based on a linear 16 × 1 Complementary Metal-Oxide-Semiconductor (CMOS) Single-Photon Avalanche Diode (SPAD) array operated in fast-gated mode by a novel fast-gating Active Quenching Circuit (AQC) array, which enables the detectors with sub-ns transitions thanks to a SPAD-dummy approach. The detector exhibits a timing resolution better than 50 ps (Full Width at Half Maximum - FWHM) at a measurement repetition rate up to 40 MHz, and provides 16 independent outputs compatible with commercial Time-Correlated Single-Photon Counting (TCSPC) instrumentation. The instrument has been experimentally characterized and operated in preliminary NLOS imaging acquisitions where a 40 × 60 cm hidden object is successfully reconstructed by scanning over a grid of 150 × 150 positions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 25, 2020
- Source ID
- 10.3390/instruments4020014
Entities
People
- Alberto Tosi
- Andreas Velten
- Federica Villa
- Ji Hyun Nam
- Marco Renna
- Mauro Buttafava
Organizations
- Defense Advanced Research Projects Agency