• SAMAN AHMED S. SAFFAR College of Engineering, University of Duhok, Kurdistan Region- Iraq
  • SALIH MUSTAFA S. ATROSHEY College of Engineering, University of Duhok, Kurdistan Region- Iraq
Keywords: ROF, Transmission Medium Enhancement Techniques, FBG, DCF, OA, Base Station (BS), Central Station (CS).


 It is well-known that the wireless communications cannot provide long distances, because the radio signals have a limited bandwidth and are susceptible to atmospheric noise and distortion. Recently, the Radio over Fiber (RoF) has become a matured technology in terms of coverage, security, and performance since it utilizes the fiber optic cable as the transmission medium. The RoF is a technology that modulates the optical signal by radio signal and transmit it across a fiber optic cable to extend the transmission length and wireless access. Currently, this technology is used to provide enhanced performance wireless systems due to its large advantages of optical fiber medium and flexibility of wireless communication. This paper provides the implementation, simulation, and enhancement of a currently existing RoF system using Optisystem 14 software to improve the length and performance of a system that is designed to transmit 2 Gbps data rate on single channel of 1300 nm wavelength using an external MZM with an input power of 10 dBm, from 5000 Km with a Bit Error Rate (BER) of 4.3 × and Quality Factor (QF) of 12.6667 to 7000 Km with a BER of 3.34  ×  and QF of 15.74. In addition, these improvements are achieved through enhancing the main system parameter such as Continuous Wave Laser (CWL) and Extinction Ratio (ER) of the MZM as well as utilizing several transmission enhancement techniques such as Dispersion Compensation Fiber (DCF), Fiber Bragg Grating (FBG) and optical amplifier (OA). As a result, the length and performance of the proposed system in term of BER and QF are improved with a range of 40 %, 51.35 %, and 24.26 % for system length, BER and QF respectively as compared to the length and performance of the previous system.




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