3 March 2016 Actively stabilized silicon microring resonator switch arrays for optical interconnects
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We report our progress towards actively stabilized silicon microring switch arrays for optical interconnects using our recently proposed slope-detection method. The stabilization scheme utilizes an in-resonator all-silicon photomonitor that detects the detuning of the microring resonance wavelength from a carrier wavelength at 1550 nm. The photomonitor utilizes linear sub-bandgap surface-state absorption (SSA) on the unpassivated air-silicon waveguide interfaces. Our experiments demonstrate SSA-based photomonitors with a cavity-enhanced responsivity of ~ 1.9- 2.3 mA/W upon a bias voltage of -1 V. We demonstrate actively stablized 2-by-2 microring switch fabrics with intensity variations of ~1 dB over a temperature modulation of ~7 °C among the four transmission channels.
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Yu Li, Yu Li, Andrew W. Poon, Andrew W. Poon, } "Actively stabilized silicon microring resonator switch arrays for optical interconnects", Proc. SPIE 9751, Smart Photonic and Optoelectronic Integrated Circuits XVIII, 97510Q (3 March 2016); doi: 10.1117/12.2214536; https://doi.org/10.1117/12.2214536

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