To obtain images, pump radiation is projected onto a thin layer of laser medium through a spatial light modulator. The lasing conditions for such a laser are analyzed, and it is shown that it is possible to generate gray-scale images.
A. F. Kornev, I. G. Kuchma, V. P. Pokrovskii, L. N. Soms, and V. K. Stupnikov, "Generation of images in a cavity by spatial gain modulation," J. Opt. Technol. 70, 504-509 (2003)