Ultrafast Laser Beamsplitter, P Polarized, 50.8 mm, 680-1080 nm

The 20RQ00UB.4 low GVD 50/50 Beamsplitter for Ultrashort Pulses is specially designed to minimize femtosecond pulse dispersion and wavefront distortion of reflected and transmitted light. This beam splitter is for P-polarized light is coated to provide a 50-50 split at 45° angle of incidence from 680-1080 nm. A thin UV grade fused silica substrate, with λ/10 wavefront distortion, is used to reduce pulse dispersion from the substrate material. For the UB.4 coating group velocity dispersion is between +50 fs² and -180 fs² over 680-1080 nm for P-polarized light at 45° angle of incidence. UB.4 coated beamsplitter can be used to split 50% of the P-polarized output beam from Spectra Physics ultrafast amplifiers and oscillators namely Solstice and Spitfire, and Mai Tai. This 50.8 mm diameter beamsplitter is designed to minimize pulse dispersion and maximize bandwidth for beam splitting and autocorrelation measurements of ultrafast laser pulses.