Alkali halide crystals can be used to provide a quick and simple method for obtaining a three-dimensional ultraviolet laser beam profile. The crystals have a large dynamic range, and the same crystal may be used an indefinite number of times.
M. P. McCann,
C. H. Chen,
S. D. Kramer,
"Ultraviolet Laser Beam Monitor Using Alkali Halide Crystals," Optical Engineering 25(10), 251177 (1 October 1986). https://doi.org/10.1117/12.7973974