Abstract

We experimentally demonstrate a demodulation scheme for 20Gbaud/s nonreturn-to-zero differential quadrature phase-shift keying signals using a silicon microring resonator. Either the I or Q channel can be selected by electrical tuning using the carrier depletion effect. Error-free (bit error rate <109) operations can be achieved for both the I and Q channels with 1.5dB power penalty compared with a commercial 20 GHz Mach–Zehnder delay interferometer. The tuning range of the ring resonator can be up to 60 GHz, which enables operation over a wide range of data rates.

© 2012 Optical Society of America

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