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:doi:10.1364/PRJ.7.001169

Photonics Research, 2019, 7 (10): 10001169, Published Online: Sep. 27, 2019

LED-based fiber quantum key distribution: toward low-cost applications Download： 842次

Xiu-Xiu Xia ¹Zhen Zhang ²Hong-Bo Xie ^1,3Xiao Yuan ⁴Jin Lin ^1,3Sheng-Kai Liao ^1,3Yang Liu ^1,3Cheng-Zhi Peng ^1,3Qiang Zhang ^1,3,*Jian-Wei Pan ^1,3

Author Affiliations

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

² QuantumCTek Corporation Limited, Hefei 230088, China

³ Shanghai 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

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

Figures & Tables

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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Table1. Experimental Parameters (P) That Are Directly Measured or Calculated of Our QKD System

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

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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[J]. Photonics Research, 2019, 7(10): 10001169.

LED-based fiber quantum key distribution: toward low-cost applications Download： 842次

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

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

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.

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).

Table1. Experimental Parameters (P) That Are Directly Measured or Calculated of Our QKD System

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LED-based fiber quantum key distribution: toward low-cost applications Download： 842次

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

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

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.

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).

Table1. Experimental Parameters (P) That Are Directly Measured or Calculated of Our QKD System

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