All-Optical Signal Processing and Routing with Spectral Control by a High- Resolution Arrayed-Waveguide Grating

We proposed and designed novel arrayed-waveguide gratings (AWGs) for time-to-space (T-S) conversion-based high-speed optical signal processing. Recently, the frequency selectivity of AWGs has been considerably improved, offering the possibility of powerful tool for the manipulation of optical spectra. An arrayed-waveguide grating was fabricated, integrated with a 90 degree deflecting mirror. Moreover, we developed the AWG with integrated parabolic mirrors in the slab waveguides, suitable for integration into a spatial light modulator. We also developed an arrowhead-shaped AWG with v-bend structures in a waveguide array, effectively reducing the size of an AWG and facilitating the fabrication of a high-resolution AWG. All-optical signal processing, including photonic encoding/decoding for optical code division multiplexing and photonic routing, is described below and theoretically explained. Furthermore, a fully integrated dispersion compensator was developed using an AWG.