High speed pulse generators with electro-optic modulators based on different bit sequence for the digital fiber optic communication links

Mahmoud M. A. Eid (Taif University)
Ashraf S. Seliem (Benha University)
Ahmed Nabih Zaki Rashed (Menoufia University)
Abd El-Naser A. Mohammed (Menoufia University)
Mohamed Yassin Ali (Benha University)
Shaimaa S. Abaza (Benha University)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 21, No 2: February 2021

The paper outlines the simulation of various pulse generators for the enhancement of optical fiber access transmission networks within flow rate of 10 Gbps and transmission range of 100 km. The pulse generators are gaussian, hyperbolic secant, triangle, sine, raised cosine in the transmission stage. Proposed pulse generators are mixed with both electro-absorption modulator (EAM) and mach-zehnder modulator (MZM) for efficient transmission. We have compared the max.  the quality factor with using proposed pulse generators against nonreturn to zero (NRZ) return to zero (RZ) pulse generators in the previous research works for different bit sequences. The signal power amplitude is tested for both optical fiber and PIN photodetector optical time-domain visualizer and RF spectrum analyzer by using in the optimum cases for different bit sequence. It is observed that proposed pulse generators/EAM have presented an efficient increase in Q-factor value compared with proposed pulse generators/MZM for different bit sequences.