الفهرس 
Chapter One: IntroductionOnly 14 pages are availabe for public view
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Abstract
The objective of this work is to compensate chromatic dispersion in standard single mode optical fibers (SSMFs). To achieve this, two dispersion compensation models are proposed. A 4- identical stages cascaded apodized linear chirped fiber Bragg gratings (CFBGs) is used in the first proposed model in post-compensation scheme under Maximum Time Division Multiplexing (MTDM) transmission technique. Through a comparative study the proposed model performance is evaluated using different connections and the most common apodization functions. This comparative study includes three cases based on the used connection scheme. Under common operating parameters a WDM link of 70 km length with data rate of 10 Gbps is simulated. For the evaluation and simulation Optisystem 7.0 is used, in terms of quality factor (Q-factor) and bit error rate (BER). The proposed model achieves the highest results in the pre-compensation scheme with a Q-factor equal 7.664 and a BER equal 8.99×10-15, using the raised cosine apodization function. Using the raised sine apodization in the post-compensation connection realizes the best performance, Q-factor equal 8.58 and a BER equal 4.77×10-18. In the symmetrical-compensation scheme and using the raised sine apodization the proposed model attains the highest results with Q-factor equal 7.49 and BER equal 3.53×10-14.
The second model consists of a Dispersion Compensation Fiber (DCF) and a 4- identical stages cascaded apodized linear CFBGs in a pre-compensation scheme under MTDM. Based on different connection schemes and apodization functions, a comparative study is conducting for the proposed model evaluation. The model is inserted in a10 Gbps WDM link of 110 km length and a DCF of 10 km length is simulated using the common operating parameters. Also, Optisystem 7.0 is used for simulating and evaluating the connected model and using the Q-factor and BER as indices. The raised sine apodization function attains the highest results in all considered connections. The best performance raised in case of the pre-compensation scheme with Q-factor equal 7.3 and BER equal 1.5×10-13. In the post-compensation connection, the results are: Q-factor of 6.1 and a BER of 4.2×10-10. The obtained results in symmetrical-compensation scheme are: Q-factor equal 6.8 and a BER equal 6×10-12.
The best proposed model of the two models is the first proposed model in post-compensation scheme with raised sine apodization. Compared to the related previous work, this model achieves a performance enhancement percentage at least 92%.