Analysis and optimization of compact demultiplexer monitor based on photonic-crystal waveguide

A wavelength selective lateral outcoupler based on multimode photonic-crystal waveguides (WGs) is presented. Its fundamental advantages are a small footprint, an inherently flexible and versatile design, and a natural WG integration. Devices can serve demultiplexing or monitoring purposes. We numerically discuss design and optimization issues and corresponding details of experimental investigations.