We report an on-chip, acousto-optic beam steering technique that uses only a single gigahertz acoustic transducer to steer light beams into free space. Exploiting the physics of Brillouin scattering, where beams steered at different angles are labeled with unique frequency shifts, this technique uses a single coherent receiver to resolve an object’s angular position in the frequency domain and enables frequency-angular resolving (FAR) LiDAR.
We demonstrate a simple device construction, control system for beam steering, and frequency-domain detection scheme at a low manufacturing cost. The device achieves frequency-modulated continuous-wave (FMCW) ranging with an 18 deg field of view (FOV) and 0.12 deg angular resolution. The device can be scaled up to an array realizing miniature, low-cost FAR LiDAR imaging systems with a wide 2D field of view.
A invited speaker presentation by Professor Mo Li, University of Washington, Seattle.
About Mo Li
Dr. Mo Li is a Professor in the UW Department of Electrical & Computer Engineering and the UW Physics Department.
About University of Washington, Seattle
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Professor Mo Li is invited speaker at the 2024 edition of the European Conference on Integrated Optics.