Abstract: Wavelength Division Multiplexing (WDM), transmitting signals on different wavelength channels simultaneously through an optical fiber, is rapidly becoming a technology-of-choice to meet the tremendous bandwidth demand of the next generation wide-area networks. Wavelength Converters are still very expensive. Hence, it is desirable that just a limited amount of Wavelength Converters are used in the whole network. In this case, a vital question arises: how many converters are enough and where to place these converters. This motivated to do the research in the wavelength converter placement problem. Hence to define the research solution rather than applying conventional methods, intelligence based approach is taken. Fundamentally the concepts inspired by nature like Evolutionary Computation.