Some of the key parameters to think about are; the wavelength range, polarization and physical size requirements. Fiber optic beam splitters are used to divide light from one fiber into two or more fibers. Both 1XN and 2XN. Beam splitters take on many forms; cubes, plates, hexagons, pentagons, polarizing, non -polarizing (usually somewhere in between), narrowband, broadband, dielectric, air-spaced, metal, cemented, optically contacted (epoxy free bonding). Notch Optics produces a variety of beamsplitters, such as plate and cube, Polka-Dot, and Dichroic with a variety of UV, VIS, and IR coating. Beamsplitters are a type of coated optical glass with one or more layers of thin films coated on the surface.