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Ultrafast Thin-Film Near-IR Polarizers

Photonics Spectra
Dec 2013
Edmund Optics Inc.Request Info
BARRINGTON, N.J., Sept. 26, 2013 — Edmund Optics has introduced ultrafast thin-film transmission and reflection polarizers for high-power lasers operating in the near-IR range.

The transmission models have polarizing coatings on both sides, while the reflection models feature a polarizing coating on the input face and an antireflection coating on the output face. Both types measure 25.4 mm in diameter and have a wavelength range of 750 to 850 or 980 to 1090 nm.

With high damage thresholds, they are suitable for high-power lasers, including Ti:sapphire. Their extinction ratio provides suitable efficiency for a wide variety of applications.


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antireflection coating
A thin layer of material applied to a lens surface to reduce the amount of reflected energy. Ideally the index of refraction of that material should be equal to the square root of the product of the indices of the material on either side of the coating, while the ideal thickness for a single-layer coating is one-quarter of the wavelength at which reflectance is to be minimized. See also multilayer coating.
thin film
A thin layer of a substance deposited on an insulating base in a vacuum by a microelectronic process. Thin films are most commonly used for antireflection, achromatic beamsplitters, color filters, narrow passband filters, semitransparent mirrors, heat control filters, high reflectivity mirrors, polarizers and reflection filters.
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