CaF2 is a cubic crystal with an excellent transmission from 130 nm to 10 μm and has widespread applications as transparent windows in the ultraviolet and infrared spectra. Recently, CaF2 windows found a wide use for broadband continuum generation (white light generation) pumped by femtosecond lasers. UPT supplies [001] cut (i.e. the surface is perpendicular to the [001] axis) high quality CaF2 windows for continuum generation. CaF2 windows cut along a random orientation and polycrystalline CaF2 are also available.