Performance Analysis of Dispersion Compensation for Chromatic Dispersion and FWM in WDM-RoF Using DPSK Modulation

Tira Gustina¹, Arjuni Budi Pantjawati¹

1. ¹ Indonesia University of Education

International Symposium on Materials and Electrical Engineering (ISMEE), 2025

Radio over Fiber (RoF) based on Wavelength Division Multiplexing (WDM) is an efficient data transmission technology that supports high capacity and high speed communication networks. However, the system performance is limited by chromatic dispersion and Four-Wave Mixing (FWM) effects, which can cause signal distortion and power degradation. This study analyzes the effectiveness of dispersion compensators in mitigating these impairments using Dispersion Compensating Fiber (DCF) and Chirped Fiber Bragg Grating (CFBG) within a WDM-RoF framework. The impact of varying bit rate, number of channels, and modulation formats Non-Return-to-Zero (NRZ) and Differential Phase Shift Keying (DPSK) is also evaluated through simulations conducted using OptiSystem 7.0. The results show that the use of dispersion compensators significantly improves system performance. CFBG achieves the best performance for short distance transmission due to its precise dispersion control, while DCF performs better over longer distances because of its higher compensation capacity. Increasing the number of WDM channels and bit rate enhances the FWM effect and dispersion accumulation, leading to higher signal distortion and reduced Q factor. Regarding modulation formats, DPSK outperforms NRZ by providing higher resilience to dispersion and nonlinear effects, resulting in improved signal integrity, higher$Q$factor, and lower Bit Error Rate (BER). Conversely, NRZ is simpler to implement but more susceptible to degradation at higher bit rates and channel counts.

DOI10.1109/ismee68179.2025.11472816Copy