1. Israel Ceramic and Silicate Institute; Haifa 3200003 Israel
2. Center for Optical Materials and Technologies; Belarusian National Technical University; Minsk 220013 Belarus
3. Materials engineering department; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
4. Elbit Systems; El-Op, Adv. Tech. Park; Rehovot 7611101 Israel