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Near-infrared 3D imaging with upconversion detection 被引量:1

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摘要 We demonstrate a photon-sensitive,three-dimensional(3D)camera by active near-infrared illumination and fast time-of-flight gating.It uses picosecond pump pulses to selectively upconvert the backscattered photons according to their spatiotemporal modes via sum-frequency generation in a χ^(2) nonlinear crystal,which are then detected by an 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 of14 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.
出处 《Photonics Research》 SCIE EI CAS CSCD 2022年第12期2760-2767,共8页 光子学研究(英文版)
基金 U.S.Army Contracting Command,New Jersey(W15QKN-18-D-0040)。
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