Detection efficiency measurement for single photon detectors based on correlated photon pairs and superconducting photon detectors

摘要

Quantum-correlated photon pairs generated by four-wave mixing in dispersion-shifted fiber were utilized to determine detection efficiency for superconducting transition edge single photon detectors. High detection efficiency of the detectors enables a high coincident count rate of 3 kHz at 76 μW pump laser power. Deduced detection efficiency in this method was well consistent with the value obtained with conventional method. This method has high flexibility to optical fiber-based devices used at telecommunication wavelength.