Assessment of Highly Performance Secure Optical Communication Systems based on Chaotic Design

  • Nesreen M. Al-Saidi Computer Engineering Department, College of Engineering, Al-Iraqia University, Baghdad, Iraq
  • Mudhafar H. Ali Computer Engineering Department, College of Engineering, Al-Iraqia University, Baghdad, Iraq
الكلمات المفتاحية: Fiber optic, DWDM, chaotic stream segmentation (CSS), stream ciphers, Optisystem simulation programs

الملخص

As optical communication system deployment is expensive, and reconfiguration is occasionally impossible or costly, system experiments and simulations have become necessary for predicting and optimizing system performance. OptiSystem is a cutting-edge optical communication simulation tool for designing, testing, and optimizing nearly any kind of optical connection in the physical layer of a wide range of optical systems. This paper proposed single-mode fiber as a transmitting medium for encrypted data. We examined a Dense Wavelength Division Multiplexing (DWDM) system with eight channels operating at 10 Gbps. A large capacity 80 Gbps system with a frequency range of 193.1 THz–193.8 THz and a Non-Return to Zero (NRZ) modulation format is analyzed in the proposed design. The results show that the proposed scheme can effectively transmit secure data based on new chaotic systems. MATLAB is used to implement the encryption and decryption processes, whereas some statistical analysis and OptiSystem 7 are used to assess the signal transmission in optical fibers. The performance of the proposed system is evaluated in terms of Quality Factor (Q-factor), Bit Error Rate (BER) and eye .diagram. It is observed that by varying the input power from -15 dBm to 15 dBm with step of 5 dBm, a low BER with a high Q-factor has the best values at 5 dBm of input signal power , where the maximum Q-factor is 42.2797, and the minimum BER of 0 is obtained for 100 km of optical fiber length. A slightly degradation in system performance was abserved with increasing of fiber length from 50 km to 125 km.

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منشور
2022-09-17
القسم
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