The increasing diffusion of WDM communication systems requires low cost and efficient optical add-drop devices to add or drop channels at predefined wavelengths with reduced insertion loss and cross-interference. Although many fiber based devices have already been proposed, the integrated solution is very attractive since it allows an increase in the compactness and in the mechanical stability. In this paper we propose an innovative integrated OADM based on a grating assisted coupler that exhibit a theoretically null back-reflection at all the ports and does not require a critical grating longitudinal positioning. Simulations done assuming a glass on silica technology show that excellent performances of the proposed device.
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