received his Ph.D. in Experimental Physics in 1999 from Van der Waals-Zeeman Institute, University of Amsterdam. Mischa’s background is in optics and soft condensed matter. He came to UC Berkeley to work with Prof. David Horsley as a Senior Research Scientist following seven years as Senior Research Scientist in the Department of Optics and Mechanics at Philips Research in the Netherlands. There, he worked in such diverse fields as biosensors for point-of-care diagnostics, GaN photonic crystal LED light extraction, soft imprint lithography, polymer OLEDs, electrowetting-based beam steering, and ultrasound for cardiac ablation monitoring. He is currently working at BSAC on high-speed optical beam steering using phased arrays of lightweight high-contrast grating mirrors.
10 MHz Optical Phased Array Metrology and Control [BPN642]
Very fast optical beam steering and wave front correction can be achieved by employing phased arrays of lightweight High Contrast Grating (HCG) MEMS mirror etalons. The etalons provide a large phase shift for a small displacement, 100x more than traditional reflective mirror elements. Operating such etalon arrays requires exquisite control of the MEMS mirror displacements. Our aim is to use in-situ stroboscopic interferometric imaging of the etalons to ensure phase accuracy and combat long term-drift, while employing feed-forward electrical input shaping to achieve fast settling time and precise phase tracking in a power-efficient way.