Single-chip holographic beam steering for lidar by a digital micromirror device with angular and spatial hybrid multiplexing

Brandon Hellman, Chuan Luo, Guanghao Chen, Joshua Rodriguez, Charles Perkins, Jae Hyeung Park, Yuzuru Takashima

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)21993-22011
Number of pages19
JournalOptics Express
Volume28
Issue number15
DOIs
StatePublished - Jul 20 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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