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A method is proposed for locking the resonance of a high-bandwidth, silicon micro-ring modulator using intrinsic-defect-mediated-photon-absorption. The photo-signal is generated by the modulator, and thus the need for a waveguide tap is negated. A digital PID loop is used for stabilization.
Post-fabrication trimming of a silicon micro-ring resonator is demonstrated using an electrically mediated process. The resonance of a fully fabricated ring is permanently blue-shifted by 240pm after diffusion from local reservoirs of boron dopant. Thermal energy is supplied by an integrated heater.
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