An Ultra-Compact 4 × 4 and 8 × 8 Optical Switch Based on Dual-Microring Resonators

We demonstrate an optical switch array based on the topology of Butterfly by using dual-microring resonators which can be used in the ultra-compact network. The proposed switch is composed of 12 basic switch elements tuned by thermo-optic (TO) effect, which can build links freely without any blocking. Due to the advantages of microring resonators, the footprint switch array is smaller than 0.2 mm2. The optical structure can complete 4- and 8-ports signal routing. It shows a large bandwidth over 50GHz, thereby performing well under condition of high-speed data transmission.

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