SYSTEM DESIGN AND PERFORMANCE ANALYSIS OF HIGHLY CONCENTRATED WDM SYSTEMS

This paper presents the design and simulation of a high-capacity 32-channel Dense Wavelength Division Multiplexing (DWDM) system using OptiSystem software. Each channel transmits a 10 Gbps signal modulated onto optical carriers spaced at 100 GHz intervals, enabling efficient multiplexing into a single-mode fiber. The study addresses critical challenges in DWDM transmission, including chromatic dispersion, attenuation losses, and inter-symbol interference. To mitigate these impairments, the system incorporates Erbium-Doped Fiber Amplifiers (EDFAs) for signal amplification and Dispersion Compensating Fiber (DCF) to counteract pulse broadening. Through optimized placement of EDFAs and precise dispersion compensation, the proposed architecture successfully recovers all 32 transmitted signals at the receiver with high fidelity, demonstrating a low bit error rate (BER) and robust performance. The results validate the effectiveness of the design in achieving reliable, high-speed optical communication, while also highlighting potential areas for future refinement in spectral efficiency and nonlinearity management.