Abstract
Due to the progress of modern technologies in covert communication, in this work a new communication system is proposed using the chaotic system resulting from optoelectronic feedback of semiconductor laser. Where the sinusoidal signal (amplitude A and frequency f were 0.0 and 0.1 a.u, respectively) was used to examine the transmission efficiency of the signal and it was found that the purity of the received signal at the receiving unit depends on the amount of synchronization between the two systems, i.e., on the coupling factor between the transmitting and receiving systems. It was found that the ideal value of the coupling factor was 270 a.u at initial condition xi1, yi1, zi1, xi2, yi2, and zi2 are 1, 1, 0.005, 1, 1, and 0.05, respectively, as the two systems showed full synchronization between them. Through the results obtained, it was found that the chaotic system resulting from the optoelectronic feedback (OEFB) presents a modern technique for encoding the signal to send it with high confidentiality, and the reason is due to the wide bandwidth of the spectrum of the chaotic system, which allows easy selection of the appropriate frequency for encoding information, and in this way it was possible to open a new field in secret communications. In fact, the percentage matches between the transmitted signal and the received signal reach 99.99%.
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Each co-author has made specific unique contributions to the work. The authors EAA prepared special program for solving the differential equations of the secure communication using optoelectronic feedback in semiconductor laser using the Berkeley Madonna program. SMK contributed to conceptualizations, writing—original draft. The author RKJ contributed to supervision and editing analysis.
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Abed, E.A., Mousa, S.K. & Jamal, R.K. A novel secure communication system using optoelectronic feedback in semiconductor laser. J Opt 53, 913–922 (2024). https://doi.org/10.1007/s12596-023-01182-1
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DOI: https://doi.org/10.1007/s12596-023-01182-1