Single-photon detector calibration by means of conditional polarization rotation
G. Brida, Marco Genovese, Marco Gramegna, Maria Luisa Rastello, Maria V. Chekhova, Leonid A. Krivitsky · Journal of the Optical Society of America B · 2005
We propose a new scheme for measuring the quantum efficiency of a single-photon detection apparatus by using polarization-entangled states. The scheme consists of measuring the polarization of a member of a polarization-entangled pair after a 90° polarization rotation conditional on the detection of the correlated photon after polarization selection. We present experimental results obtained with this scheme compared with traditional biphoton calibration. Our results show the interesting potentiality of the suggested scheme.