| For the upcoming decade,fibre-optic and wireless communications are constantly growing in data rates.However,with the current enlargement in wireless communication,the dynamic spectrum access is majorly limited because of the wide use of today's conventional frequency range.Optical fibre networks offer a great capacity and wireless networks provide easy to access and mobile connections.By employing a blend of these advantages,a viable platform can be developed that has great potential for upcoming novel services and applications.Producing,modulating,and detecting signals with the help of photonic techniques has multiple advantages including improvement of bandwidth or the rate of data and integrating fibre optics into wireless networks.This thesis studies the cost-effective solution to upgrade capacity to use 10G-class optical devices at the transmitter by using advanced modulation formats with high spectral efficiency.We take the power of the four-level pulse amplitude modulation(PAM-4)format to achieve 25-Gb/s transmission per wavelength.We proposed and experimentally demonstrated data transmission over wireless and wired connection.The methodology can minimize cost and complexity in the optical domain by using heterodyne photonic up conversion and employing an EML for signal generation and taking the power of the digital signal processing for digital down conversion.The results of this study show a performance improvement over existing systems.From the results the proposed structure would be a practical and low-cost solution for typical high speed wired and wireless transmission that is EML-based four-channel PAM-4 combined with heterodyne photonic up-conversion and Volterra filter. |
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