Proposal for 1×4 ultracompact arrayed waveguide grating based on Si-nanowire spirals

Abstract

A 1×4 ultracompact AWG, based on Si-nanowires is proposed. In this configuration waveguides with couple of spirals are used instead of conventional AWG systems. Arrangement of spirals is in such a way that, not only makes it possible to reach a large lightpath in a small area, but also there is more freedom in size adjustment. Presented AWG has 4 channels with channel spacing of 0.2 nm and total size of less than 250×290 µm2.