Low-crosstalk silicon-photonics arrayed waveguide gratings integrated with micro-ring filter

Abstract

A low-crosstalk compact arrayed waveguide grating integrated with a tunable micro-ring resonator is demonstrated on silicon-on-insulator platform, The side-lobe of the silicon nanowire AWG, introduced by fabrication errors, can be effectively suppressed by the Ring Filter, The crosstalk level of the side-lobe can be reduced from -16.3 dB to -26.8dB, in addition, the crosstalk of integrate AWG have improved over the entire 3 dB bandwidth, with a maximum crosstalk improvement of 8.9 dB at the left and right wavelengths of the 3 dB bandwidth, and the excess loss from the ring resonator can be ignorable in principle.