• 3 mm thickness minimizes pulse dispersion

• Fresnel Reflectance from 1-10% at 45°

• Uncoated front surface for beam sampling, AR coated back surface 

Our 3-mm thick Ultrafast Laser Beam Sampler is designed to minimize pulse dispersion while splitting off, or sampling, a beam by Fresnel Reflection for beam monitoring applications. The N-BK7 substrate is uncoated on the front surface to achieve beam division by Fresnel Reflection. The back surface is antireflection coated to prevent ghosting. A slight wedge in the substrate virtually eliminates internal fringes. Depending on the polarization of the incident beam, front surface reflectance from 1-10% can be attained at 45° incidence.