Efficient Mach–Zehnder modulators with high-pumped laser-based multimode doped fibers in high-modulated optical coded systems

This study has clarified the pump laser with Er-doped multimode fibers integrated with modified Mach–Zehnder modulators for medium reach applications. Optimum electrical base band power form amplitude is demonstrated with time durations in the presence of pulse amplitude modulation (PAM) line coding. The max base electrical power form with the spectral frequency based on the NRZ line coding is studied. Max electrical base band power form with the spectral frequency in the presence of PAM line coding is simulated. Total electrical base band power form amplitude in the presence of non-return-to-zero (NRZ) line coding is demonstrated. The total base band electrical form power amplitude based on PAM line coding is illustrated. The max optimum Q base band form Factor-min BER values based on both PAM and NRZ line coding. The base signal base band/base band form noise ratio after APD photodetector with refractive index contrast is simulated numerically. Total lighted signal base band power through measured index multimode fiber with refractive index contrast is demonstrated clearly. Besides, the optimum Q base band factor after APD photodetector with refractive index contrast is studied.