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Geiger-mode avalanche photodiodes for laser communications and laser radar

By: Groves, S.H.; Hopman, P.I.; Frechette, J.P.; Funk, J.E.; Duerr, E.K.; Donnelly, J.P.; Dauler, E.A.; Aversa, J.C.; Aull, B.F.; Vineis, C.J.; Verghese, S.; Smith, G.M.; Shaver, D.C.; Ouellette, E.J.; Oakley, D.C.; Napoleone, A.; McIntosh, K.A.; Mahoney, L.J.; Mahan, J.M.; Liau, Z.-L.; Jensen, K.E.;

2006 / IEEE / 1-4244-0090-2

Description

This item was taken from the IEEE Conference ' Geiger-mode avalanche photodiodes for laser communications and laser radar ' Arrays of photon-counting avalanche photodiodes (APDs) enable laser-communications and laser-radar receivers with unprecedented sensitivity at 1.06-/spl mu/m wavelength. Near room temperature, the best detectors have: 50% photon detection efficiency, 30-kHz dark count rate, and a 1-/spl mu/s reset time to avoid after-pulsing. Arrays with 64 elements were fabricated in the InGaAsP/InP materials system and were bump-bonded to a custom CMOS integrated circuit (IC) with a novel nonblocking architecture to continuously report both time-of-arrival for incoming photons as well as their spatial location on the array. Larger arrays with 1024 elements were mated to custom read-out ICs that report time and location data at lower duty cycles (typically 1-5%) and are appropriate for pulsed laser-radar systems.