A line of sapphire cover glass windows for 4 kW and larger industrial cutting lasers that prevent contamination of the fiber lens from debris is available from Laser Research Optics of Providence, Rhode Island.
Laser Research Sapphire Fiber Laser Windows feature Moh 9 hardness which is second only to diamond, feature a 10-5 scratch-dig finish, and can withstand steel splatter, flash, and debris. Providing 1/4 wave transmitted wave-front, these highly polished sapphire windows are ideally suited for use as debris shields on 1064 nm industrial cutting lasers from 4 kW and above.
Reducing the typical number of lens changes, Laser Research Sapphire Fiber Laser Windows have A/R coatings on both sides and provide > 99.5% transmis-sion @ 1.07 microns, with > 90% @ 650-670 nm. Available in 1” to 2” sizes, sapphire is harder and more durable than quartz. Sapphire C-Plane windows coated on one or two sides are also offered.
Laser Research Sapphire Fiber Laser Windows are priced according to size and quantity. Price quotations are available upon request.