Optical Covert Communication System Based on Amplified Spontaneous Emission Light and Chaotic Digital Encryption

Hailong Yang; Bing Lu; Weigang Hou; Wei Huang; Ye Zheng; Pengxing Guo; Bin Li; Lei Guo

doi:10.3788/AOS251051

Acta Optica Sinica, Volume. 45, Issue 16, 1606008(2025)

Optical Covert Communication System Based on Amplified Spontaneous Emission Light and Chaotic Digital Encryption

Hailong Yang^1,2, Bing Lu^1,2、*, Weigang Hou^1,2, Wei Huang^1,2, Ye Zheng^1,2, Pengxing Guo^1,2, Bin Li^1,2, and Lei Guo^1,2

Author Affiliations

¹School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

²Institute of Intelligent Communications and Network Security, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(12)

Fig. 1. Chaotic digital encryption process

Download full size

Fig. 2. Schematic diagram of covert channel transmitter

Download full size

Fig. 3. Schematic diagram of covert communication system

Download full size

Fig. 4. Chaos state and Lyapunov index. (a) Chen’ s chaotic attractor; (b) Lyapunov index of chaotic system

Download full size

Fig. 5. Chaotic sequence values with different initial values

Download full size

Fig. 6. Key sequence distributions. (a) $K_{1}$ distribution; (b) $K_{2}$ distribution; (c) $K_{3}$ distribution

Download full size

Fig. 7. Signal spectra. (a) Signal spectra before entering SMF; (b) spectra before and after filtering

Download full size

Fig. 8. Electrical signal. (a) Time domain waveform; (b) eye diagram

Download full size

Fig. 9. Public signal eye diagrams. (a) Signal eye diagram in presence of covert channels; (b) signal eye diagram when there are only public channels

Download full size

Fig. 10. BER curves. (a) Public channel BER curves; (b) covert channel BER curves

Download full size

Fig. 11. Influence of initial value on BER

Download full size

Table 1. System parameters setting

View table

Table 1. System parameters setting

Parameter	Setting
Center frequency f1 of ASE/ LD	193.5 THz
Power of ASE/ LD	10 dBm
Type of MZM	push-pull
$V_{π D C}$	4 V
$V_{π R F}$	6 V
Insertion loss	3.5 dB
Extinction ratio	35 dB
Length of SMF	50 km
Dispersion coefficient of SMF	16 ps/（nm·km）
Nonlinear index of SMF	$2.6 \times 10^{- 20} m^{2} / W$
Core area of SMF	$80 μ m^{2}$
Output power of EDFA	2 mW
Noise figure of EDFA	4 dB
Noise tilt of EDFA	0 dB/Hz
Photodiode model	PIN
Responsivity of PD	0.8 A/W
Thermal noise of PD	$10 p A / \sqrt[]{H z}$
Dark current of PD	5 nA
Shot noise of PD	On

Tools

Get Citation

Copy Citation Text

Hailong Yang, Bing Lu, Weigang Hou, Wei Huang, Ye Zheng, Pengxing Guo, Bin Li, Lei Guo. Optical Covert Communication System Based on Amplified Spontaneous Emission Light and Chaotic Digital Encryption[J]. Acta Optica Sinica, 2025, 45(16): 1606008

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites

Paper Information

Category: Fiber Optics and Optical Communications

Received: May. 8, 2025

Accepted: May. 29, 2025

Published Online: Aug. 19, 2025

The Author Email: Bing Lu (lubing@cqupt.edu.cn)

DOI:10.3788/AOS251051

CSTR:32393.14.AOS251051

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology