Compact free-running InGaAs/InP single-photon detector with 40% detection efficiency and 2.3 kcps dark count rate

Qi Xu, Chao Yu, Wei Chen +4

Free-running InGaAs/InP single-photon detectors (SPDs) based on negative-feedback avalanche diodes (NFADs) are the key components for applications requiring asynchronous single-pho…