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Opt Express. 2013 Jul 15;21(14):16716-21. doi: 10.1364/OE.21.016716.

Improved sinusoidal gating with balanced InGaAs/InP Single Photon Avalanche Diodes.

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  • 1Electrical and Computer Engineering, University of Virginia, Charlottesville, VA 22904, USA.


We report balanced InGaAs/InP single photon avalanche diodes (SPADs) operated in sinusoidal gating mode with a tunable phase shifter to reduce common mode noise. This technique enables detection of small avalanche pulses, which results in reduced afterpulsing. For laser repletion rate of 20 MHz at 240 K, the dark count rate for photon detection efficiency of 10% is 8.9 kHz.

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