title: Temporal and spatial multiplexed infrared single-photon counter based on high-speed avalanche photodiode.
abstract: We report on a high-speed temporal and spatial multiplexed single-photon counter with photon-number-resolving capability up to four photons. The infrared detector combines a fiber loop to split, delay and recombine optical pulses and a 200 MHz dual-channel single-photon detector based on InGaAs/InP avalanche photodiode. To fully characterize the photon-number-resolving capability, we perform quantum detector tomography and then reconstruct its positive-operator-valued measure and the associated Wigner functions. The result shows that, despite of the afterpulsing noise and limited system detection efficiency, this temporal and spatial multiplexed single-photon counter can already find applications for large repetition rate quantum information schemes.
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200062, China.
authors.forename: Xiuliang
authors.initials: X
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200062, China.
authors.forename: Chengjie
authors.initials: C
authors.lastname: Ding
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200062, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Pan
authors.affiliation: Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, 4 Place Jussieu, 75005 Paris, France.
authors.forename: Kun
authors.initials: K
authors.lastname: Huang
authors.affiliation: Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, 4 Place Jussieu, 75005 Paris, France.
authors.forename: Julien
authors.initials: J
authors.lastname: Laurat
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200062, China.
authors.forename: Guang
authors.initials: G
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200062, China.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China.
authors.forename: E
authors.initials: E
authors.lastname: Wu