Low noise InGaAs/InP single photon detector with widely tunable repetition rates

InGaAs/InP avalanche photodiodes typically work in the gated Geiger mode to achieve near-infrared single-photon detection. By using ultrashort gates and combining with the robust spike-canceling technique that consists of the capacitance-balancing and low-pass filtering technique, we demonstrate an InGaAs/InP single-photon detector (SPD) with widely tunable repetition rates in this paper. The operation frequency could be tuned conveniently from 100 MHz to 1.25 GHz with the SPD’s performance meas