Abstract
We propose and experimentally demonstrate a low-power 2×2 silicon electro-optic (EO) switch consisting of a double-ring assisted Mach-Zehnder interferometer (DR-MZI). Active tuning elements based on p-i-n diodes and silicon resistive micro-heaters are embedded in the microrings for high-speed EO switching and low-loss thermo-optic (TO) tuning, respectively. The transmission spectrum shows the device can perform switching in a 60GHz spectral window with a crosstalk less than -20 dB. After phase error correction with 2.31mW TO power, the EO switch power from cross to bar states is only 0.69mW. The rise and fall times of the switch are 405 and 414ps, respectively. The switch operation of the device is verified by high-throughput optical signal transmission up to 25Gbps.
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