Switchable detector array scheme to reduce the effect of single-photon detector's deadtime in a multi-bit/photon quantum link

Cong Liu, Yongxiong Ren, Jiapeng Zhao, Mohammad Mirhosseini, Seyed Mohammad Hashemi Rafsanjani, Guodong Xie, Kai Pang, Haoqian Song, Zhe Zhao, Zhe Wang, Long Li, Joshua C. Bienfang, Alan Migdall, Todd A. Brun, Moshe Tur, Robert W. Boyd, Alan E. Willner

Research output: Contribution to journalArticle

Abstract

We explore the use of a switchable single-photon detector (SPD) array scheme to reduce the effect of a detector's deadtime for a multi-bit/photon quantum link. The case of data encoding using M possible orbital-angular-momentum (OAM) states is specifically studied in this paper. Our method uses N SPDs with a controllable M×N optical switch and we use a Monte Carlo-based method to simulate the quantum detection process. The simulation results show that with the use of the switchable SPD array, the detection system can allow a higher incident photon rate than what might otherwise be limited by detectors’ deadtime. For the case of M=4, N=20, a 50-ns deadtime for the individual SPDs, an average photon number per pulse of 0.1, and under the limit that at most 10 % of the photon-containing pulses are missed, the switchable SPD array will allow an incident photon rate of 2250 million counts/s (Mcts/s). This is 25 times the 90 Mcts/s incident photon rate that a non-switchable, 4-SPD array will allow. The increase in incident photon rate is more than the 5 times increase, which is the simple increase in the number of SPDs and the number of OAM encoding states (e.g., N∕M=20∕4).

Original languageEnglish (US)
Pages (from-to)132-137
Number of pages6
JournalOptics Communications
Volume441
DOIs
StatePublished - Jun 15 2019
Externally publishedYes

Keywords

  • Orbital angular momentum
  • Quantum communication
  • Single photon detection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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  • Cite this

    Liu, C., Ren, Y., Zhao, J., Mirhosseini, M., Hashemi Rafsanjani, S. M., Xie, G., Pang, K., Song, H., Zhao, Z., Wang, Z., Li, L., Bienfang, J. C., Migdall, A., Brun, T. A., Tur, M., Boyd, R. W., & Willner, A. E. (2019). Switchable detector array scheme to reduce the effect of single-photon detector's deadtime in a multi-bit/photon quantum link. Optics Communications, 441, 132-137. https://doi.org/10.1016/j.optcom.2019.01.081