Thin Film Polarizers (TFPs) can split a laser beam into two parts with orthogonal polarizations. Conversely, TFPs can be used to combine two beams with orthogonal polarizations. TFPs consist of a coated plate, which is oriented at Brewster’s angle with respect to the incoming beam. The thin-film coating serves to enhance the beam’s s-polarized reflectivity, while maintaining the p-polarized component’s high transmission.
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