LED-based fiber quantum key distribution: toward low-cost applications

Xiu-Xiu Xia; Zhen Zhang; Hong-Bo Xie; Xiao Yuan; Jin Lin; Sheng-Kai Liao; Yang Liu; Cheng-Zhi Peng; Qiang Zhang; Jian-Wei Pan

doi:10.1364/PRJ.7.001169

Journals >Photonics Research >Volume 7 >Issue 10 >Page 1169 > Article

Photonics Research
Vol. 7, Issue 10, 1169 (2019)

LED-based fiber quantum key distribution: toward low-cost applications

Xiu-Xiu Xia¹, Zhen Zhang², Hong-Bo Xie^1、3, Xiao Yuan⁴, Jin Lin^1、3, Sheng-Kai Liao^1、3, Yang Liu^1、3, Cheng-Zhi Peng^1、3, Qiang Zhang^1、3、*, and Jian-Wei Pan^1、3

Author Affiliations

¹National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China

²QuantumCTek Corporation Limited, Hefei 230088, China

³Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China

⁴Department of Materials, University of Oxford, Oxford OX1 3PH, UK

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DOI: 10.1364/PRJ.7.001169 Cite this Article Set citation alerts

Xiu-Xiu Xia, Zhen Zhang, Hong-Bo Xie, Xiao Yuan, Jin Lin, Sheng-Kai Liao, Yang Liu, Cheng-Zhi Peng, Qiang Zhang, Jian-Wei Pan, "LED-based fiber quantum key distribution: toward low-cost applications," Photonics Res. 7, 1169 (2019) Copy Citation Text

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Fig. 1. Optical spectra of the LEDs employed in our system after they are filtered by an FBG.

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Fig. 2. Temporal patterns of optical pulses from different LEDs.

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Fig. 3. Schematic of our QKD system. PMBS, polarization-maintaining beam splitter; PMPBS, polarization-maintaining polarization beam splitter; BS, beam splitter; FBG, fiber Bragg grating; SMBS, single-mode beam splitter; PBS, polarization beam splitter; TDC, time-to-digital converter.

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Fig. 4. Theoretical simulation result of the key rate versus the transmission distance (dark gray filled cubes) and the experimental result of the key rate at the transmission distance of 1 km (red filled circle).

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$P$	Value	$P$	Value
$Q_{μ}^{z}$	$5.5636 \times 10^{- 3}$	$E_{μ}^{z}$	0.0189
$Q_{ν}^{x}$	$2.2766 \times 10^{- 4}$	$E_{ν}^{x}$	0.2654
$Q_{ν}^{z}$	$1.62 \times 10^{- 3}$	$Y_{0}^{z}$	$8.3728 \times 10^{- 5}$
$Y_{0}^{x}$	$1.2197 \times 10^{- 4}$	$Y_{1}^{z}$	$1.5519 \times 10^{- 2}$
$Y_{1}^{x}$	$1.7243 \times 10^{- 3}$	$Q_{1}^{z}$	$4.1609 \times 10^{- 3}$
$e_{1}^{b x}$	$1.0351 \times 10^{- 1}$	$e_{1}^{p z}$	$1.0378 \times 10^{- 1}$