Liu, C.
, Ren, Y.
, Zhao, J.
, MIRHOSSEINI, M.
, RAFSANJANI, S.
, XIE, G.
, Pang, K.
, Zhao, Z.
, Li, L.
, Bienfang, J.
, Migdall, A.
, Brun, T.
, Tur, M.
, Boyd, R.
and Wilner, A.
(2019),
Switchable detector array scheme to reduce the effect of single-photon detector’s deadtime in a multi-bit/photon quantum link, Optics Communications, [online], https://doi.org/10.1016/j.optcom.2019.01.081
(Accessed October 9, 2025)
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Switchable detector array scheme to reduce the effect of single-photon detector's deadtime in a multi-bit/photon quantum link
Published
Author(s)
Cong Liu, YONGXIONG Ren, Jiapeng Zhao, MOHAMMAD MIRHOSSEINI, SEYED RAFSANJANI, GUODONG XIE, Kai Pang, Zhe Zhao, Long Li, , , Todd Brun, Moshe Tur, Robert Boyd, Alan Wilner
Abstract
We explore the use of a switchable single-photon detector (SPD) array to reduce the effect of individual SPDs' deadtime for a multi-bit/photon quantum link such as M-orbital-angular-momentum (OAM)-encoded one. Our method uses 􀡺 SPDs with a controllable 􀡹 × 􀢭 optical switch. Our Monte Carlo-based simulation model assumes an 􀡹=4-OAM encoded quantum link and a 50-ns deadtime for the individual SPDs. With an average photon number per pulse of 0.1 and under the limit that at most 10% photon-containing pulses are missed, a switchable 􀡺=20-SPD array will allow an incident photon rate of 2250 million counts/s (Mcts/s). However, a nonswitchable, 4-SPD array has a limited rate of 90 Mcts/s under the same assumption. This increase in speed is more than the 5 (􀫛􀫙⁄􀫝) times increase in the number of SPDs. Moreover, when working at the same incident photon rate and the same average photon number per pulse, the missing ratios of photon-containing pulses for the following two detection schemes are comparable: a switchable 16-SPD array having a characteristic deadtime as slow as 50 ns and a non-switchable, 4-SPD array with a deadtime of <10 ns.Citation
Optics Communications
Volume
441
Pub Type
Journals
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Keywords
single photon source, single photon, single photon detector, quantum information, quantum detectors, photon statistics
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Created February 24, 2019, Updated October 12, 2021