A serial-cascaded double-microring-based silicon photonic circuit for high-speed on-chip clock-recovery applications

We fabricate a silicon microring-based photonic circuit comprising a passive NRZ-to-PRZ signal-format converter and a serial-cascaded modulator for clock-recovery applications. We demonstrate on the same chip 5-Gbit/s format conversion and 5-GHz sampling with 64-ps-width pulses.