We demonstrate the integration of a 30% efficient grating coupler with a compact photonic crystal wavelength demultiplexer (DeMUX). The DeMUX has seven output channels that are spaced apart and is aimed at coarse WDM applications. The integrated devices are realized on a high-index-contrast membrane using a simple benzocyclobutene wafer bonding technique. Cross talks of to for four channels apart are obtained without optimization.
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