Experimental Upconversion of Images
  We experimentally demonstrate the up-conversion of light carrying an image from the infrared spectrum to the visible spectrum using four-wave mixing via a ladder-type configuration in an atomic vapor. The results we obtained show the high correlation between the input image and the up-converted image. We also discuss the possible influences of experimental parameters on the resolution. Our work might be useful for research in astrophysics, night-vision technology, and chemical sensing. 
Dong-Sheng Ding, Zhi-Yuan Zhou, Wen Huang, Bao-Sen Shi, Xu-Bo Zou, and   Guang-Can Guo
physics.optics