Shaping Square Top-Hat Laser Beams with DOEs and Verifying with Beam Profiling

In short A top-hat spreads the energy evenly. A Gaussian beam is brightest at the centre; a square top-hat has a flat plateau over a square area and steep edges. DOEs do the shaping. A diffractive optical element reshapes the phase of a clean single-mode (TEM₀₀) beam. Multimode or strongly diverging beams are better served […]
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