Broadband dispersive mirrors for Cr:ZnS/Cr:ZnSe laser

The broadband dispersive mirror based on Si/SiO2 thin-film materials and providing group delay dispersion of -200 fs2 in the spectral range from 2 to 3.2 µm have been successfully developed and produced for the first time. The mirrors open a new avenue in the development of ultrafast optics operating in the infrared spectral range and push forward the ultrafast mid-infrared technology.