The PP-MGF2-25.4-1.0-AR251-AR251 from OPTOMAN is an Ultrafast Optical Window that operates at a wavelength of 700 nm - 1300 nm. It has a diameter of 25.4 mm and thickness of 1 mm. This magnesium fluoride (MgF₂) optical window has a clear aperture above 20 mm and surface quality of 60-40 S-D (scratch-dig) per clear aperture. It has a parallelism of less than 20 arcsec and transmitted wavefront distortion below lambda/8 (at 633 nm). This optical window has an ion beam sputtering coating and a reflective surface with a maximum absorbed reflectance of 0.65% (900 nm - 1100 nm), 1.9% (700 nm - 900 nm) & 1.6% (1100 nm - 1300 nm). It has a group delay dispersion of over 30 fs² and protective chamfers of 0.2 - 0.4 mm x 45 deg. This optical window is ideal for high-power applications.