A Si Photonic WDM Receiver with Micro-Ring Resonator Crosstalk Cancellation

We present a silicon photonic WDM receiver using micro-ring resonators (MRRs) with on-chip analog crosstalk cancellation. The design enables dense channel spacing, demonstrated at$4\lambda\times {25}$. Gbps with 250 pm (31.2 GHz) separation, by effectively suppressing MRR crosstalk at the receiver front end.