Parametric Image Upconversion of 10.6-μm Illuminated Objects

Abstract
Images at 0.96 μm of 10.6‐μm illuminated objects were obtained by the parametric image upconversion technique. The nonlinear material used in this experiment was a single crystal of proustite pumped by 1.06‐μm radiation from a single‐mode Nd:YAG laser. Angular resolution of about 3 mrad and a 12‐deg field of view were obtained. The upconverter was operated in a Fourier‐space configuration and gave nearly diffraction‐limited performance.

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