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Published on: April 4, 2017
Demodulation of 20 Gbaud/s differential quadrature phase-shift keying signals using wavelength-tunable silicon
Ke Xu1, Liang Wang, Gordon K P Lei
1Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China. kxu@ee.cuhk.edu.hk
Abstract:
We experimentally demonstrate a demodulation scheme for 20 Gbaud/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 <10(-9)) operations can be achieved for both the I and Q channels with ~1.5 dB 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.
