Thin film brewster coupling device
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United States of America Patent
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Oct 18, 2022
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N/A
app pub date -
Jun 1, 2021
filing date -
Jun 1, 2021
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Abstract
A thin film Brewster coupling device configured for low loss transmission of an imposed polarized parallel to plane of incidence 8.5 micron to 11.5 micron wavelength laser beam and simultaneous high reflectivity of a polarized perpendicular to plane of incidence 2 micron to 4 micron wavelength laser beam. The device comprising an optical media substrate and at least one dielectric stack optically coupled to the optical media substrate where the dielectric stack comprises a dielectric layer and an overlayer, the dielectric layer and the overlayer each comprising a thickness of nominally a quarter wavelength of the 2 micron to 4 micron wavelength laser beam, and oriented at near the Brewster Angle to the incident 8.5 micron to 11.5 micron wavelength laser beam. The substrate and dielectric mediums of necessary characteristics to result in low LIDT, high strength, chemical inertness and high thermal conductivity.
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