Optical coatings of the 3.8-um reflecting and visible transmitting

Shengming Xiong; Yundong Zhang

doi:10.1117/12.318276

5 August 1998 Optical coatings of the 3.8-μm reflecting and visible transmitting

Shengming Xiong, Yundong Zhang

Author Affiliations +

Proceedings Volume 3557, Current Developments in Optical Elements and Manufacturing; (1998) https://doi.org/10.1117/12.318276
Event: Photonics China '98, 1998, Beijing, China

Abstract

The optical performance of beam splitters developed for deuterium fluoride (DF) laser applications as shared- aperture components is presented. This component simultaneously has provided high reflectance in 3.8 micrometers DF laser output band and high transmittance in the visible wavelength region. The coating consists of a number of periods of multilayer stack which is reflecting in the infrared and transmitting at visible wavelengths. The period is formed of alternate high index ZnS and low index YbF₃ materials layers which are transparent in the infrared and visible wavelengths. The 99.2% reflectance at 3.8 micrometers DF laser output band and 75.0% transmittance at 0.4 approximately 0.9 micrometers visible band have been obtained. The laser damaged threshold is more than 20 kw/cm² at DF CW laser illumination.

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Shengming Xiong and Yundong Zhang "Optical coatings of the 3.8-μm reflecting and visible transmitting", Proc. SPIE 3557, Current Developments in Optical Elements and Manufacturing, (5 August 1998); https://doi.org/10.1117/12.318276

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