Automated Photonic Tuning of Silicon Microring Resonators Using a 3D-printed Microfluidic Mixer

We demonstrate a novel method to automate tuning of microring resonators using 3D-printed microfluidic control capable of resonance wavelength shifts of 4 nm. We use a custom 3D-printer that can fabricate microfluidic devices with sub-10 μm features and that perform automatic pumping, mixing, and dilution operations.