Improving signal integrity using EDFA amplifiers in multi-channel WDM optical systems

Abstract Wavelength division multiplexing (WDM) is a modern technology used in optical fiber communication. It works on multiple data signals with different wavelengths to travel together in one fiber. The paper shows the design and simulation of a WDM system using Opti System software. Our goal is to check how well the system performs by looking at important factors like bit error rate (BER), optical signal-to-noise ratio (OSNR), and Q -factor. The system includes laser sources, modulators, WDM multiplexers, optical fiber, amplifiers (EDFA), and demultiplexers to send and receive multiple signals at once. We will study things like channel spacing, fiber loss, and noise affect the signal quality of a system. Opti system tools like spectrum analyzers, eye diagrams, and BER graphs were used to check the system’s performance. The optical spectrum shows various channels working together in the C-band. BER and Q -factor results show that the received signal is above threshold but can be better with some improvements. The system works well up to 50 km using amplifiers. This project shows that WDM over multiple channels is a good way to send fast and clear data over long distances using optical fiber.