We report Si/SiO2 mirrors operating in the spectral range 2-3.2 um. The coatings exhibit reflectance exceeding 99.6% and provide group delay dispersion of (-100 fs2) and (-200 fs2.) The mirrors are key elements of Cr:ZnS/Cr:ZnSe femtosecond lasers and oscillators.
© 2019 The Author(s)
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