Midinfrared up-conversion imaging under different illumination conditions

Abstract

Converting the medium-emitting infrared field to the visible band is an effective image-detection method. We propose a comprehensive theory of image up-conversion under continuous optical pumping, and discuss the relationship between the experimental parameters and imaging field of view, resolution, quantum efficiency, and conversion bandwidth. Theoretical predictions are given based on numerical simulations, which show good agreement with experimental results. In particular, coherent and incoherent light illumination are studied separately and the advantages and disadvantages of their imaging performance are compared and analyzed. This work provides a detailed study of the up-conversion image detection performance of the system, which is of great value in guiding the design of the detection system and bringing it to practical applications.