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Fiber Laser Sapphire Windows

Photonics Spectra
May 2014
Laser Research OpticsRequest Info
PROVIDENCE, R.I., Feb. 19, 2014 — Laser Research Optics has released a series of protective fiber laser sapphire windows for use with 1-µm optics.

Featuring Moh 9 hardness, the windows can withstand steel splatter, flash and debris, making them more durable and scratch-resistant than zinc-sulfide or fused-silica windows.

They are available in sizes from 1 to 2 in. and feature a 10-5 scratch-dig finish, λ/4 flatness and antireflection coatings on both sides. The windows provide >99.5% transmission at 1.07 µm and >90% at 650 to 670 nm.


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fused silica
Glass consisting of almost pure silicon dioxide (SiO2). Also called vitreous silica. Frequently used in optical fibers and windows.
zinc sulfide
A polycrystalline material that transmits in the infrared; it is used as a phosphor in x-ray and television screens.
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