In this paper, an optical transmission link at 10 Gb/s is experimented with Non -Return to -Zero (NRZ) modulated input source with the help of OptSim-software. The performance of the system has been measured in terms of BER for optical link developed using various types-of-fibers at reference loss and wavelength of 1550 nm along with dispersion and nonlinearities whose tolerances have been assessed up to 400 kms. Results have been obtained and compared by considering the impact of second and third order dispersion terms with and without dispersion compensation for different fibers. It has been observed that DS_Anomalous (DSA) fiber shows the best practical results with 10‒10 BER value at 246 kms of transmission -distance without dispersion compensation and 340 kms with dispersion compensation.

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