This Article contains an error in the legend of Table 2, where the axes width is incorrect. “The beam spots had elliptical shape with semi-axes ?x and ?y, and different methods were performed for spot size characterization.” should read: “The beam spots had elliptical shape with axes ?x and ?y, and different methods were performed for spot size characterization.” Additionally, there is an error in Figure 2, where the conversion between standard deviation and FWHM of a Gaussian distribution was performed by an incorrect factor. The correct Figure 2 appears below as Figure 1. (Figure presented.).