الفهرس 
Chapter 1: IntroductionOnly 14 pages are availabe for public view
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Abstract
In the following and based on the simulation results, we briefly display the conclusion of procedure steps in each model and the main conclusions of the designed fiber-based model.
In summary, the main conclusions of this study could be stated as follows:
1. from the simulation results of the dispersion model in single mode silica doped fiber we found that, there is an inverse relation between chromatic dispersion coefficients and the ambient temperature, weight percentage of germania and the relative refractive index. In contrast, the relation is direct between chromatic dispersion coefficients and the input signal wavelength.
2. The determined optimum operating parameters for minimum attenuation and chromatic dispersion coefficients are λs of 1.70 μm, Δλ of 0.1 nm, Δ of 0.001, T of 283 K and x of 0.1.
3. Concerning the soliton and MTDM models, each model has three cases. The three cases are: case one effect of relative refractive index, case two effect of ambient temperature and case three effect of weight percentage of germania. We note that the two models have the same response to the dependent and independent parameters. The soliton model simulation results show that, the raised cosine apodized identical 4-stages cascaded AUFBGs with soliton is the best scheme. It has a maximum Br of 1.9932 Gbps.
4. The MTDM model showed better performance than soliton model. The best MTDM scheme is the raised cosine apodized identical 4-stages cascaded AUFBGs with MTDM at maximum Br of 7.6973 Gbps.
5. SSMF-based model is the second model proposed to enhance the chromatic dispersion compensation in a SSMF. We only consider the schemes that meet the minimum operational requirements (i.e. Q-factor > 6 and BER < 10-9) The best scheme is the one has the maximum Q-factor and the minimum BER. The best scheme is the tanh apodization in symmetrical compensation scheme that gives the maximum reasonable results with Q-factor of 6.39 and BER of 8.4×10-11.
6. The second SSMF-based model is the DPSK-based model. The simulation results show that, using CFBG under DPSK achieves the best results: maximum Q-factor of 7.22 at minimum BER of 2.56×10-13.
7. The best proposed model of the two main models is the SSMF-based model under DPSK modulation using a 4-stages identical cascaded tanh-apodized CFBGs in post-compensation scheme. This model achieves a percentage of improvement in the system performance over the related work at least 97%.
5.2 Recommendations for Future Work
In this section, we outline suggestions for future work, that follows the subject of this study. We can consider the following points:
1. Using hybrid modulation formats (e.g., DPSK/OQPSK) to enhance chromatic dispersion compensation in the optical fiber.
2. Using cascaded FBG with stages of nonlinear distribution.
3. Implementing an embedded system for dispersion compensation using FBG.
4. Using cascaded FBG with Orthogonal Frequency Division Multiplexing (OFDM).