Focus Investigation behind Aspherical Lens
Abstract
High-power laser diodes often show asymmetric divergence and astigmatism between two directions. As an example, a laser diode is firstly collimated by an objective, then focused by an aspherical lens, and the evolution of the field in the focal region is investigated in VirtualLab Fusion. The influence of the astigmatism on the field in its focal region is clearly presented, compared against to the case without astigmatism.
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Use Case
Simulation of Laser Beam in Focal Region of High-NA Asphere
When a linearly polarized beam is focused by a high-NA lens, the focal spot shows asymmetry due to the relatively strong Ez component.
Use Case
Collimation of Astigmatic Diode Laser Beam by Objective Lens
High-power laser diodes often exhibit asymmetric divergence and astigmatism. Collimation of such a laser diode is investigated with both ray tracing and field tracing.