Please choose here, if you would like a infrared laser with a circular beam profile or an elliptical beam profile. The preselection determines the settings on the configurator. You can always also directly choose to use the product configurator and insert your criteria there. Please note that a circular beam profile only means that the beam profile is round, not that the intensity profile is rotationally symmetric, as well. Only lasers of type 13MC/13MMC and 5MC have circular beam profiles with rotationally symmetric intensity distribution.