Abstract

We report the demonstration of an OR/NOR directed logic device, which consists of two cascaded micro-ring resonators (MRRs) modulated through electric-field-induced carrier depletion in reverse-biased PN junctions embedded in the ring waveguides. The resonance wavelength mismatch between the two nominally identical MRRs, caused by fabrication error, is compensated by thermal tuning. Two high-speed electrical signals applied to the PN junctions act as the operands, and the logical operation results are represented by the optical powers detected at the two output ports of the device. The working parameters of the device, including the working wavelength, the voltage applied to the micro-heater, and the voltages applied to the two PN junctions are extracted from the static response spectra of the device. Dynamic experimental results show that the OR/NOR logical operations can be achieved at the speed of 10 GHz.

© 2014 Optical Society of America

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