The OPTOMAN PP-UVFS-25.4-3.0-AR875-AR875 is a 25.4 mm diameter UV fused silica laser window designed for high-performance ultraviolet optical systems operating at 257 nm. It features precision-polished UVFS (C7980 0F) substrate material with a 3.0 mm thickness and narrowband ion beam sputtered anti-reflection coatings on both optical surfaces.

With reflectance below 0.2% at 257 nm for both sides, the window is designed to maximize UV transmission while reducing reflection-related losses and unwanted back-reflections. Its greater than 90% clear aperture, 20-10 surface quality, and transmitted wavefront distortion of λ/8 at 633 nm make it suitable for demanding laser beam delivery and protection applications.

The window is optimized for 257 nm ultraviolet laser operation and can be integrated into fourth-harmonic Yb laser systems and other UV laser architectures where low optical losses, good wavefront quality, and controlled surface performance are important.