Polarization Diversified 16λ Demultiplexer Based on Silicon Wire Delayed Interferometers and Arrayed Waveguide Gratings

We proposed novel 16λ demultiplexer based on cascaded connection of silicon-nanowire waveguide type delayed interferometric filters and arrayed waveguide gratings, and experimentally verified 100-GHz-spaced bandpass filtering operation with nearly identical insertion loss (<6dB) and low crosstalk (<-19.5dB to <-34.6dB for a single channel, <-12.7dB for entire output channels). We also demonstrated polarization diversified operation with 32 Gbps non-return-to-zero (NRZ) signal transmissions in C-band range. We also verified the operation of 140-GHz-spaced bandpass filtering in O-band spectral range.