Low-loss and flat/wide-passband CWDM demultiplexer using silica-based AWG with multi-mode output waveguides

We demonstrated compact and cost-effective 8-channel filters for unidirectional and bidirectional CWDM systems with a low loss of 1.7 dB, a wide 1-dB bandwidth of 14 run, and low crosstalk by using an AWG with multi-mode waveguides.