Request InfoGT Advanced Technologies, Advanced Materials GroupGT Crystal Systems’ high-purity, superior-homogeneity sapphire windows are now available online. They are offered for sale from stock in various sizes and polishes, including laser-quality white-light generators and substrates. VUV-grade sapphire windows are available built to order. Visit our online catalog.See full productRelated content from Photonics MediaPRODUCTSPhotonics.com 7/10/2023Active Optical FiberThe TrueLase™ Yb 22/400-915-3kW ytterbium-doped active optical fiber from OFS Fitel LLC is a double clad fiber designed for high-efficiency, reliable, multi-kW fiber lasers. 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