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A new approach to design digitally tunable optical fllter system for DWDM (Dense Wavelength Division Multiplexed) optical networks is presented. This digitally tunable optical fllter system uses semiconductor optical ampliflers (SOAs) and DWDM thin fllm fllter based wavelength selection elements. The design is very easy to conflgure, expand and reduce. This digitally tunable optical fllter system is smaller in size, lesser in weight, cheaper in cost, consumes low power and has better timing performance as compared to digitally tunable optical fllter suggested by researchers recently.

A NEW APPROACH TO DESIGN DIGITALLY TUNABLE OPTICAL FILTER SYSTEM FOR DWDM OPTICAL NETWORKS