Design of RoF-VLC based WDM Communication System based on Pre-DCF Technique

Abstract

Radio over Fiber with Visible Light Communication system (RoF-VLC) is a promising technology that integrates the benefits of optical fiber communication and wireless transmission. This abstract presents a novel approach to enhance the RoF system by integrating VLC with millimeter-wave (mmWave) technology, leveraging the advantages of both systems. The proposed system utilizes mmWave signals over a single optical fiber link through a Wavelength Division Multiplexing (WDM) technology to enable the simultaneous transmission of multiple VLC system. However, challenges arise when extending the reach of VLC systems over long distances due to optical fiber dispersion. This paper explores the application of pre-Dispersion Compensation Fiber (pre-DCF) techniques to address dispersion issues in RoF-VLC systems. The study begins with an overview of RoF and VLC technologies, highlighting their respective strengths. RoF enables the seamless transmission of wireless signals over optical fibers, while VLC harnesses the visible light spectrum for data communication. The integration of these technologies holds potential for enhanced coverage and reliability. Dispersion, a critical concern in optical fiber communication, can degrade the quality of transmitted signals. Pre-DCF techniques are introduced as a proactive solution to mitigate dispersion effects before they compromise signal integrity. By combining these technologies, the proposed system achieves high-speed data transmission and increased network capacity. WDM technology plays a crucial role in the proposed system by enabling the simultaneous transmission of VLC and mm Wave signals over a single optical fiber. The RoF-VLC system based on WDM technology is built and simulated using OptiSystem software, with four WDM channels at 450 nm, 450.8 nm, 451.6 nm, and 452.4 nm as an optical source of VLC system and a photodetector as a receiver. Each channel with a 40 GHz radio signal is transmitted over a 40 km of fiber link and a 3 m of VLC channel. This proposed design of RoF-VLC system based on WDM has been analyzed based on the effect of propagation distance (km), modulation format, data rate, and input power. The performance analysis show that this system is achieved by using the values of BER at 2.6355e-009 for channel 1, 7.54389e-010 for channel 2, 5.39904e-010 for channel 3, and 2.45532e-010 for channel 4.