Fig. 3. Comparison of the output intensity profile for (a) GPC-shaped and (b) hard-truncated beams. (c) and (d) show the phase profiles of the GPC-shaped and hardtruncated beams respectively. The intensity values from (a) and (b) are used as brightness values for the color mapping to highlight the regions of interest respectively.
Outside the region of interest, there are rapid phase fluctuations due to dark noise in the beam profiler. The red line plot are line scans of intensity and phase taken at y = 0.
(For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)