The construction and performance of a system for the spatial characterization of a CO2 pulsed laser beam is described. Using thermally quenched fluorescence a direct imaging technique has been developed for single shot CO2 laser pulse beam profiling. A CCD video camera and framestore interfaced to a PC computer are used to image the spatial intensity distribution produced by a CO2 pulse incident upon a temperature dependent luminescent screen. The resolution is similar to much more expensive pyroelectric detector array techniques with all the advantages of two dimensional beam processing.
N. C. Kerr,
"IR laser beam profiling using quenched fluorescence", Proc. SPIE 1438, Laser-Induced Damage in Optical Materials 1989, 14380K (1 November 1990); doi: 10.1117/12.2294429; https://doi.org/10.1117/12.2294429