Mid-Infrared Upconversion Imaging Under Different Illumination Conditions

TL;DR

This paper develops a comprehensive theory for mid-infrared to visible image upconversion under various illumination conditions, analyzing system parameters and comparing coherent and incoherent light imaging performance.

Contribution

It introduces a detailed theoretical framework for image upconversion, linking experimental parameters to imaging performance and comparing different illumination types.

Findings

Good agreement between theoretical predictions and experimental results

Analysis of coherent vs incoherent illumination performance

Guidance for designing practical upconversion imaging systems

Abstract

Converting the medium 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 of upconversion imaging results 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 analysed. This work provides a study of the upconversion 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.