Análise experimental de transmissão óptica com detecção direta em sistemas limitados em banda.

Abstract

Optical communication systems have become the predominant solution for high-speed, longdistance data transmission, thanks to their wide bandwidth capacity and low attenuation. Among the various modulation techniques available, direct modulation stands out for its simplicity, allowing the information signal to be directly modulated in the amplitude of the light. This characteristic simplifies both the transmitter and receiver implementation, resulting in a lower-cost system compared to coherent modulation methods, making it an attractive option for various practical applications. With the increasing demand for bandwidth and the expansion of communication networks, the efficiency and robustness of this technique become even more relevant. However, although optical devices offer a wide available bandwidth, electronic equipment can become a bottleneck in the performance of these systems. Therefore, channel estimation and equalization techniques are crucial. This work presents an experimental analysis of an optical communication system with direct modulation, utilizing pre-equalization to enable high-speed data transmission.