A new series of protective sapphire windows for 1µm optics that offer superior durability to zinc-sulfide and fused silica lenses is being introduced by Laser Research Optics. Laser Research Fiber Laser Sapphire Windows feature Moh 9 hardness, which is second only to diamond, making them more durable and scratch-resistant than zinc-sulfide and fused silica windows. A longer lasting replacement for debris shields and reducing the number of lens changes, these sapphire windows are capable of withstanding steel splatter, flash, and debris.

Available in 1" to 2" sizes, Laser Research Fiber Laser Sapphire Windows have a 10-5 scratch-dig finish, ¼ wave flatness, A/R coatings on both sides, and provide greater than 99.5 percent transmission @ 1.07µm, with greater than 90 percent @ 650-670 nm. Fused silica UV grade windows coated on one or two sides are also offered.