High bandwidth networks are indispensable to support the present ever increasing demand for various services on internet and to cater highly bandwidth extensive application such as video streaming and multimedia conferences. Dense Wavelength Division Multiplexing (DWDM) technology based optical networks provide potentially large transmission capacity that has an obvious advantage from both technical and economic perspectives.DWDM network design and optimization tools are developed to aid the designing and deployment of networks. Design tools play an important role in facilitating routing and wavelength assignment, filter placement, DCM and amplifier placement with the aim of minimizing the overall cost of network, in minimum amount of time. Designing and optimizing large networks require lot more processing power than a single desktop machine can actually provide. This scarcity of processing power results in either sub-optimal or infeasible solutions. This paper presents the grid enabled architecture for DWDM network design and optimization tool, which aims to harness the processing power of existing idle resources in an organization to quickly provide the optimized design for huge networks.