Abstract This paper has highlighted the simulative study and performance evaluation signature of single mode graded index doped fibers based high channel capacity with high speed vertical cavity surface emitting light source for long haul outdoor applications. The signal power attenuation is demonstrated through silica doped fibers against various modulation techniques based on different germanium dopant ratio with various silica doped fiber link lengths. Also the signal fiber dispersion coefficient is measured versus silica doped fiber length at different germanium dopant levels in the presence of various modulation techniques. As well as the overall optical system gain is clarified against Raman pumping power levels and number of Raman pumps at 20 % germanium dopant level in the presence of amplitude shift keying (ASK), frequency shift keying (FSK) and phase shift keying (PSK) modulation technique. Overall signal per noise ratio and overall system bit error rate (BER) are measured effectively against Raman pumping power levels with five and 10 Raman pumps at 20 % germanium dopant level in the presence of ASK optimum modulation technique.
Prabu et al. (Thu,) studied this question.