Polarization Diversified 16λ Demultiplexer Based on Silicon Wire Delayed Interferometers and Arrayed Waveguide Gratings
Seok–Hwan Jeong, Yosuke Onawa, Daisuke Shimura, Hideaki Okayama, Tsuyoshi Aoki, Hiroki Yaegashi, Tsuyoshi Horikawa, Takahiro Nakamura
Abstract
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 (<; 6 dB) and low crosstalk (<; -19.5 dB to <; -34.6 dB for a single channel, <; -12.7 dB 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.