Abstract
In this paper, a new optical transmission model was investigated and developed in order to improve the performance of Wavelength Division Multiplexing optical transmission systems. For this purpose, an efficient theoretical method combining a Fiber Bragg Grating (FBG) and Erbium Doped Fiber Amplifier (EDFA) was implemented. Enhancements on the transmitted signal amplitudes with important compensation of the chromatic dispersions and large reduction on the nonlinear effects were obtained. The reflectivity peak, the full width at half maximum bandwidth, and the side lobe level have been studied in depth to demonstrate the efficiency of the proposed method. To apply the new method, we considered a complicated system of 16-channel wavelengths, where the split-step fourier method was used to solve the nonlinear Schrödinger equations, and the transfer matrix method was applied to describe the coupled mode equations. The wavelengths corresponding to different values of reflectivity peaks calculated previously in the FBG outputs section were injected as EDFA inputs to determine the output power and the gain of the new transmission system. All results are analyzed using Matlab program.
Highlights
In recent years, Wavelength Division Multiplexing communication systems have been widely used as a solution to the increasing demand of high bit rate speed networks, which employ optical fiber as a medium for telecommunication and networking [1]
We propose a new optical transmission model to improve the performance of WDM optical transmission systems using Fiber Bragg Grating (FBG) and Erbium Doped Fiber Amplifier (EDFA) based on the Split-Step Fourier Method (SSFM)
The wavelengths corresponding to different values of reflectivity peaks calculated previously in the FBG output were used as EDFA inputs to determine the output power and the gain of the transmission system. e optical transmission system under study has been compared with a similar work published previously by other authors [13]
Summary
Wavelength Division Multiplexing communication systems have been widely used as a solution to the increasing demand of high bit rate speed networks, which employ optical fiber as a medium for telecommunication and networking [1]. Raman amplifiers improve the noise figure and reduce the nonlinear penalty of fiber systems, and this improves the overall system performance allowing longer amplifier spans, higher bit rates, and closer channel spacing [5] Another option for amplifications is EDFA, which results in an overall superior performance due to low loss optical window of silica-based fiber. We propose a new optical transmission model to improve the performance of WDM optical transmission systems using Fiber Bragg Grating (FBG) and EDFA based on the Split-Step Fourier Method (SSFM). For this purpose, a new code has been developed to simulate in details and evaluate the performance of optical WDM transmission system of 16 channels in terms of nonlinear and dispersion parameters. Results obtained from the study in the paper demonstrate a very high efficiency of the developed method
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