Researching | Raman Noise Analysis and Optimal Band Selection Algorithm for Wavelength Division Multiplexing Quantum Key Distribution

Laser & Optoelectronics Progress, Volume. 59, Issue 5, 0527001(2022)

Raman Noise Analysis and Optimal Band Selection Algorithm for Wavelength Division Multiplexing Quantum Key Distribution

Xiaodong Zhou¹, Songlei Zhang¹, Xiaoming Fang¹, Yuxiang Bian^2,3、*, Bao Feng^2,3, and Zhihao Liu^4、**

Author Affiliations

¹Information and communication branch of State Grid Fujian Electic Power Co., Ltd., Fuzhou , Fujian 350003, China

²Nanjing NARI Information & Communication Technology Co., Ltd., Nanjing , Jiangsu 210003, China

³Nanjing NRGD Quantum Technology Co., Ltd., Nanjing , Jiangsu 210003, China

⁴School of Computer Science and Engineering, Southeast University, Nanjing , Jiangsu 211189, China

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Abstract Get PDF(in Chinese)

Figures&Tables (8)

References (23)

Paper Information

Figures & Tables(8)

Fig. 1. Full-duplex classical-quantum multiplexing channel

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Fig. 2. Coefficients of different band channels affected by Raman noise^[18]

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Fig. 3. Optimal band multiplexing scheme obtained by simulation calculationwhen M=1

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Fig. 4. Optimal band multiplexing scheme obtained by simulation calculationwhen M=4

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Table 0. [in Chinese]

Table 0. [in Chinese]

Algorithm 1　Wavelength selection algorithm

Input：N， M， D， p， $S (i, j) = λ_{j} ρ (λ_{i}, λ_{j})$

Output：

Set A contains the label assigned to the channel by the classical channel

Set U contains the label assigned to the channel by the quantum channel

c=+∞

for t in size-N subsets of ｛1，2，…，D｝

y= $\sum_{j \in t} S (j :)$

I=sort（y）

s=sum（y）

if s<c and max（y）<p then

c=s

A= First M elements in I

U=t

end if

end for

Table 1. Experimental parameters of QKD system

Table 1. Experimental parameters of QKD system

Parameter	Value
Average number of photons per signal pulse	0.48
Quantum efficiency of single-photon detectors	0.3
Error correction inefficiency	1.2
Phase-distortion error probability， e_d	0.01
Time gate interval /ms	0.1
Channel loss coefficient /km^-1	0.046

Table 2. Experimental parameters of DWDM system
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Table 2. Experimental parameters of DWDM system
Parameter Value
NBF bandwidth /GHz 15
Channel spacing， Δ /GHz 200
Directivity of DWDM module /dB 50

Table 3. Key generation rate and improved efficiency of different fiber lengths (N=12, M=1)
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Table 3. Key generation rate and improved efficiency of different fiber lengths (N=12, M=1)
Fiber length /km R₀ /（10⁶ bit·s^-1） R /（10⁶ bit·s^-1） RI
40 14.1 14.9 5.50
45 9.33 10.1 9.69
50 5.27 6.29 19.4
55 1.79 2.93 63.0

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Xiaodong Zhou, Songlei Zhang, Xiaoming Fang, Yuxiang Bian, Bao Feng, Zhihao Liu. Raman Noise Analysis and Optimal Band Selection Algorithm for Wavelength Division Multiplexing Quantum Key Distribution[J]. Laser & Optoelectronics Progress, 2022, 59(5): 0527001

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Paper Information

Category: Quantum Optics

Received: Mar. 16, 2021

Accepted: May. 27, 2021

Published Online: Feb. 22, 2022

The Author Email: Bian Yuxiang (nrgd_lw@163.com), Liu Zhihao (liuzhtopic@163.com)

DOI:10.3788/LOP202259.0527001

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology