Dr. Youmin Wang
Department of Electrical Engineering and Computer Sciences, UC Berkeley
BSAC Postdoctoral Researcher, Ming Wu Group
June 12, 2018 | 12:00 to 01:00 | 490 Cory Hall
Host: Michael Cable
The focus of the presentation is the development of a MEMS-based optical phased array with an unprecedented aperture size and phased shifter array size. Optical phased array (OPA) are well known and have enabled applications ranging from light detection and ranging (LiDAR), free-space optical communications, optical switches, holographic display, biomedical imaging, etc. The capability of beamsteering under multi-wavelength operation with a compact, agile, low-loss, and low power-consumption solution is always pursued. These requirements demand simultaneously achieving monochromatic two-dimensional (2-D) beamsteering and broadband compatibility. However, short wavelength and broad operation wavelength range place stringent requires for OPA design and fabrication. Dr. Wang will report the demonstration of a largest ever active 2-D OPA, in which 25,600 (160 × 160) nondispersive phase shifters that are densely integrated into an aperture size of 3.2mm × 3.1mm, covering optical wavelength bands that can be operated simultaneously with >85% designed optical efficiency from 1.2um to 1.8um.
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