A Hybrid Electrooptic Microring Resonator-Based $1 \times 4\times 1$ ROADM for Wafer Scale Optical Interconnects

Pairing high-quality factor (Q) silicon-on-insulator microring resonators with rapidly tunable organic electrooptic claddings has allowed the first demonstration of a silicon-organic hybrid electrooptic reconfigurable optical add/drop multiplexer (ROADM). A coplanar electrode geometry provides up to 0.36 GHz/V of electrooptic voltage tuning for each channel, corresponding to an electrooptic coefficient of r33 = 64 pm/V at wavelengths around 1550 nm. Individual ring resonator devices have 40- mum ring radii, 2.7-nm free spectral range, and tuning ranges of 180 GHz. The 1 times 4 times1 ROADM has a footprint of less than 1 mm2 and has been shown to reconfigure in less than a microsecond.

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