High-efficiency photon-number-resolving multichannel detector
Michal Mičuda, Ondřej Haderka, Miroslav Ježek · Physical Review A · 2008
A balanced eight-port photon-number-resolving detector is developed. The employed scheme is based on an optical-fiber time-multiplexed device with the unique total optical transmittance reaching 93% and a pair of avalanche photodiodes. The balanced operation is achieved even for imperfect unbalanced fiber splitters used in the time-multiplexed device. The complete characterization of the detector for both classical and single-photon signals is presented. High-speed photon counting at the rates of $100\phantom{\rule{0.3em}{0ex}}\mathrm{kHz}$ with the total detection efficiency exceeding 50% is verified.