Beam apodization plays a key role in designing high-energy solid-state systems. Beams with steep edge profiles are more prone to develop diffraction ripples and these diffraction ripples are then intensified in optical systems such as amplifiers which may result in undesired effects such as self-focusing. To alleviate such unwanted effects caused by the diffraction ripples, beam apodizers are employed to produce beam profiles with uniform energy distribution.
Beam apodizers may be fabricated via different techniques, however, due to their constant exposure to intense radiation, they are prone to deteriorate. To address this issue, amplitude-only serrated beam apodizers were suggested by Jerome M. Auerbach and Victor P. Karpenko back in 1994.
In this newsletter, we seek to illustrate VirtualLab Fusion’s capability to model such customized aperture thanks to its highly customizable environment and cross-platform solvers. The results are then compared with that of the literature and are shown that they are in complete agreement with the lab results.Read more
Fast physical optics rests squarely on the “connecting solvers” approach. One of the most important aspects of which is that it makes both Fourier domains (space and spatial frequency) available for the implementation of the electromagnetic field solvers – some solvers will be implemented in the one domain, others in the other. This results in a simulation sequence that must move back and forth between the domains. In this week’s newsletter we look at some practical implications of this and provide some handy tips to help you make the most of your work with VirtualLab Fusion!Read more
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The advent of modern technologies in the area of material processing has seen an increase in the use of high-power laser sources in optical systems. The massive amount of heat generated by the high-energy sources leads to a deformation of the geometry and a modulation of the refractive index of the optical components in the system that will influence their properties. In VirtualLab Fusion these effects are handled by connecting surface operators with solvers for inhomogeneous media. We demonstrate these effects in various optical components common in material processing applications, like lenses and laser rods.Read more
In numerical simulations, when we represent light as an electromagnetic field, spatially extended sources can be modeled by several uncorrelated fully coherent fields, with identical energy density, but partially shifted with respect to each other [J. Opt. Soc. Am. A 27 (9), 2010]. In the fast physical optics software VirtualLab Fusion, we use this method to model a spatially extended partially-coherent source and explore the effect of the configuration of the elementary fields and the number of fields. Then we reproduce Young’s interference experiment using this source and investigate the coherence properties of the source by checking the changes in the contrast of the interference fringes.Read more