l=1 vortex created from HG10 mode directly from laser


Far-field of Gaussian beam cut with 1 glass slide and resulting l=1 vortex


Cutting a HG10 mode with a glass slide to create a quasi HG20


l=2 vortex created by quasi HG20 and an off-axis configuration of the same vortex with 3 holes


Cutting a Gaussian mode with a glass slide off-axis and resulting l=1 vortex


Cutting a Gaussian mode with a glass slide at a steep angle and a resulting vortex array of sorts (reflections from different faces of the slide may have caused the extra lobes?)


Cutting a Gaussian mode with 2 glass slides and resulting l=2 vortex

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