الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The objective of the thesis is to convey information to the recipient through fiber cables with minimal power, elevated quality of factor, and minimal bit error rate over a maximum distance. To accomplish this objective, I duplicated the simulation in a passive optical network using various powers of a continuous wave laser and assessed the Q-factor and BER. The highest connection distance achieved was 20 km at -3 dBm input power with a Q-factor of 2.6583. Extending the connection distance to 30 km or more yields impractical results. In practical terms, the maximum distance used in PON is up to 20 km. Consequently, to achieve system performance with low power, one should utilize an active optical network (AON) due to its elevated Q-factor and minimal BER, particularly for long link distances. Furthermore, I focus on undetectable tapping in the optical fiber if a snooper opposes the US signal by inserting an optical coupler with a 5:95 splitting ratio at a distance of 20 km from the optical line terminal and then utilizing an optical amplifier with a 2.65 dB gain. The snooper can easily obtain a signal of acceptable quality without being detected. As a result, a snooper can intercept signals with a low detection probability.Another aspect is discussed in this thesis, which is improving the quality-of-service support in our proposed Ethernet-based semi-dynamic bandwidth allocation. According to our findings, the implementation of hierarchical frame aggregation in Ethernet passive optical networks and wireless networks with semi-dynamic bandwidth allocation Semi MAAT greatly increases throughput and decreases delay performance with differential serving load traffic. Time delay is reduced by 35% for data, 25% for voice, and 30% for video, and throughput is increased by 25% for voice, 30% for video, and 35% for data with respect to previous work. As a future work, this algorithm could be implemented to include Giga Passive Optical Network instead of Ethernet Passive Optical Network with integrated WiMAX and find the results.