Single-photon infrared waveguide-based upconversion imaging

Ruaridh Smith,Bienvenu I. Ndagano, Guillaume Redonnet-Brown, Amelia Weaver, Andy Astill, Henry White,Corin Gawith,Loyd J. McKnight

Electro-optical and Infrared Systems: Technology and Applications XIX（2022）

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摘要

We report a nonlinear optical upconversion 3D imaging system for infrared radiation enabled by zinc indiffused MgO:PPLN waveguides. While raster-scanning a scene with an 1800 nm pulsed-laser source, we record time-of-flight information, thus probing the 3D structure of various objects in the scene of interest. Through upconversion, the 3D information is transferred from 1800 nm to 795 nm, a wavelength accessible to single-photon avalanche diode (SPAD).

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关键词

Nonlinear optics, Waveguides, Upconversion, Infrared imaging, Single-photon imaging

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