Author Affiliations +
E. M. Dianov,1 S. V. Firstov,1 V. F. Khopin,2 S. V. Alyshev,1 K. E. Riumkin,1 A. V. Gladyshev,1 M. A. Melkumov,1 N. N. Vechkanov,2 A. N. Guryanov2
1Fiber Optics Research Ctr. of the Russian Academy of Sciences (Russian Federation)
2Institute of Chemistry of High-Purity Substances (Russian Federation)