Equal Output Optical Power Raman Multi-wavelength Converter Based On Chalcogenide Fiber

With the advent of the Internet age, in order to meet the demand for a huge amount of information, the network is moving a large capacity, high-speed development. Currently, the construction of all-optical network is considered to be the preferred solution to the network to the high-capacity, high-speed development. The intelligent all-optical network as a next-generation optical networks, as it can be more efficient bandwidth utilization to improve the system, greatly enhance the capacity of the system, and gradually become the future direction of development of communication technology, and as one of the intelligent network key technology, multi-wavelength conversion has become a hot attention and research.First of all, the purpose and significance of research for the all-optical wavelength conversion technology is introduced. Based on a broad research on the literature, all-optical wavelength converters (AOWCs) are introduced in classification according to the working principle. And this thesis gives a brief introduction of the application of AOWCs and multi wavelength converters in the all-optical network. Then, when the stimulated Raman scattering (SRS) is studied in optical fibers, we envision that the Raman amplification characteristics can be used to modulate multiple continuous probe light and the information can be converted into multi-wavelength. So that the all-optical multi-wavelength conversion is realized.Secondly, the article use the analytical solution under conditions of Raman amplification from the transient SRS coupled wave equations for the fiber N-channel non-dispersive limit. The theoretical mode of realizing Raman multi-wavelength conversion is established in optical fiber. It provides theoretical basis for design and simulation. To obtain high Raman gain, the As-S fiber, which has large nonlinear coefficient and two orders of magnitude higher Raman gain coefficient than that of silicon fiber, is used as the gain medium to achieve Raman multi-wavelength conversion. Based on the theory of multi-wavelength conversion, MATLAB is used to numerical analysis. The main factors which affect the conversion process, such as the power of pump optical signal, are analyzed and discussed. This proves the feasibility of the theory.Finally, the phenomenon of unequal converted output optical power is analyzed. In order to achieved gain flattened, the method of cased same As-S fiber or different As-Se fiber is proposed after multi-wavelength conversion. Then the feasibility of two methods is verified by the numerical analysis, and the influencing factors of gain compensation is analyzed. It provides theoretical basis for the multi-wavelength converters in future 400G/1T&Beyond all-optical network...