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arXiv · 2301.09781

Parallel random LiDAR with spatial multiplexing of a many-mode laser

Kyungduk Kim·Yaniv Eliezer·Olivier Spitz·Hui Cao
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Abstract

We propose and experimentally demonstrate parallel LiDAR using random intensity fluctuations from a highly multimode laser. We optimize a degenerate cavity to have many spatial modes lasing simultaneously with different frequencies. Their spatio-temporal beating creates ultrafast random intensity fluctuations, which are spatially demultiplexed to generate hundreds of uncorrelated time traces for parallel ranging. The bandwidth of each channel exceeds 10 GHz, leading to a ranging resolution better than 1 cm. Our parallel random LiDAR is robust to cross-channel interference, and will facilitate high-speed 3D sensing and imaging.

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Kyungduk Kim, Yaniv Eliezer, Olivier Spitz, Hui Cao. 2023-01-24. Parallel random LiDAR with spatial multiplexing of a many-mode laser. https://doi.org/10.1364/oe.486348

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