Silicon 4×4×8λ space-and-wavelength selective optical switch with resonant phase shifters

A silicon $4 \times 4 \times 8 \lambda$ space-and-wavelength selective optical switch in a modified dilated Banyan topology is demonstrated with Mach-Zehnder interferometers and resonant phase shifters. All 128 routing channels exhibit $\gt30 \mathrm{~dB}$ extinction ratio and $\gt60 \mathrm{GHz}$ passband.