Abstract
Low-noise single-photon detection at 1550 nm was demonstrated using an indium–gallium–arsenide avalanche photodiode cooled to 130 K. Discharge pulse counting was adopted for after-pulse-suppressed single-photon detection. The dark-count probability and after-pulse probability were 1.4×10-7 and 6.3×10-4, respectively, when the quantum efficiency was 10%. The repetition frequency of single-photon detection was 100 kHz.
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