Experimental demonstration of a silicon-on-insulator high-performance double microring filter using MZI-based coupling.

We have experimentally demonstrated, in silicon, a double microring resonator with Mach-Zehnder interferometer-based coupling that meets many commercial specifications. Our device has a ripple of 0.5 dB, an adjacent channel isolation of at least 41.0 dB, a nonadjacent channel isolation of at least 38.6 dB, an interstitial peak suppression of at least 37.5 dB, an express channel isolation of 10.0 dB, and a free spectral range greater than the span of the C-band of 37.23 nm.