Quantum efficiency measurements by bidirectional coincidence counting of correlated photon pairs
Satoru Odate, Akio Yoshizawa, Daiji Fukuda, Hidemi Tsuchida · Optics Letters · 2007
We propose and demonstrate a procedure for characterizing the quantum efficiency of a single-photon detector in the telecommunication wavelength band. Our procedure employs a bidirectional coincidence counting technique to distinguish optical component losses from the detection efficiency. The standard deviations of the measured quantum efficiencies were nearly identical to the standard deviations derived from a detection probability having a Poisson distribution.