Near-Infrared 3D Imaging with Upconversion Detection
Abstract
We demonstrate a photon-sensitive, three-dimensional camera by active near-infrared illumination and fast time-of-flight gating. It uses pico-second pump pulses to selectively up-convert the backscattered photons according to their spatiotemporal modes via sum-frequency generation in a \c{hi}2 nonlinear crystal, which are then detected by electron-multiplying CCD with photon sensitive detection. As such, it achieves sub-millimeter depth resolution, exceptional noise suppression, and high detection sensitivity. Our results show that it can accurately reconstruct the surface profiles of occluded targets placed behind highly scattering and lossy obscurants of 14 optical depth (round trip), using only milliwatt illumination power. This technique may find applications in biomedical imaging, environmental monitoring, and wide-field light detection and ranging
Keywords
Cite
@article{arxiv.2210.17286,
title = {Near-Infrared 3D Imaging with Upconversion Detection},
author = {He Zhang and Santosh Kumar and Yong Meng Sua and Shenyu Zhu and Yu-Ping Huang},
journal= {arXiv preprint arXiv:2210.17286},
year = {2022}
}
Comments
8 pages, 7 figures