Non-collinear upconversion of infrared light.
Two dimensional mid-infrared upconversion imaging provides unique spectral and spatial information showing good potential for mid-infrared spectroscopy and hyperspectral imaging. However, to extract spectral or spatial information from the upconverted images an elaborate model is needed, which includes non-collinear interaction. We derive here a general theory providing the far field of the upconverted light when two arbitrary fields interact inside a nonlinear crystal. Theoretical predictions are experimentally verified for incoherent radiation and subsequently applied to previously published data with good agreement.
Christian
C
Pedersen
Qi
Q
Hu
Lasse
L
Høgstedt
Peter
P
Tidemand-Lichtenberg
Jeppe Seidelin
JS
Dam
D060733:Electromagnetic Radiation; D004867:Equipment Design; D007259:Infrared Rays; D008962:Models, Theoretical; D013055:Spectrophotometry, Infrared / Q000295:instrumentation*