Arrayed Waveguide Lens Wavelength Add-Drop in Silica

We present experimental results of an integrated 16-channel, 100-GHz-channel-spacing wavelength add-drop in silica. It consists of two interleave-chirped waveguide grating routers connected by an array of waveguides containing thermooptic phase shifters. The fully packaged device has 6.6-7.6 dB fiber-to-fiber insertion loss and a switching extinction ratio > 27 dB (> 33 dB for a single polarization) when used as an add-drop. It is compact, allowing for at least four such devices per 5-inch-diameter wafer.