Brewster Prism has an apex angle such that a p-polarized light incident at Brewster's angle will pass through the prism in a direction parallel to the base of the prism with minimum deviation. At the heart of the Brewster prism lies the Brewster angle, a critical concept in optics governing the behavior of light at the interface between two media with different refractive indices. When light strikes a transparent medium at the Brewster angle, the reflected rays and refracted light components become perpendicular to each other, resulting in the reflected light being all polarized parallel to the interface. Exploiting this phenomenon, Brewster prisms are constructed to utilize the Brewster angle for efficient polarization manipulation. Brewster Prisms are often used in situations where surface reflection losses cannot be tolerated. Brewster Prisms can also function to select a single wavelength from a multi-wavelength laser. Tuning is allowed through tilting the prisms.