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).
The alert did not successfully save. Please try again later.
R. Smith, B. Ndagano, G. Redonnet-Brown, A. Weaver, A. Astill, H. White, C. B. E. Gawith, L. J. McKnight, "Single-photon infrared waveguide-based upconversion imaging," Proc. SPIE 12271, Electro-optical and Infrared Systems: Technology and Applications XIX, 1227103 (2 November 2022); https://doi.org/10.1117/12.2636260