Open AccessSingle-chip holographic beam steering for lidar by a digital micromirror device with angular and spatial hybrid multiplexing
Author(s) -
Brandon Hellman,
Chuan Luo,
Guanghao Chen,
J.J. Rodriguez,
Charles Perkins,
JaeHyeung Park,
Yuzuru Takashima
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.394114
Subject(s) - digital micromirror device , optics , spatial light modulator , beam steering , holography , lidar , grating , physics , beam (structure) , phase modulation , multiplexing , chip , materials science , computer science , telecommunications , phase noise
A digital micromirror device (DMD) based holographic beam steering technique is reported that multiplexes fine-steering binary amplitude gratings with a coarse-steering programmable blazed grating. The angular spatial light modulation (ASLM) technique encodes the spatial pattern of the binary amplitude grating at the same plane as the angular modulation set by a phase map of the DMD-based beam steering technique. The beam steering technique is demonstrated at 532 nm and implemented into a 905 nm lidar system. The results of the lidar system tests are presented, achieving a 44° field-of-view, 0.9°×0.4° (H×V) angular resolution, 1 m max distance, 1.5 kHz sampling, and 7.8 FPS video. Scalability techniques are proposed, including max distance increases to over 100 m.