Author Affiliations

V. V. Dvoyrin,^1),2) I. T. Sorokina,^1),* V. L. Kalashnikov,³⁾ V. M. Mashinsky,²⁾ L. D. Ischakova,²⁾ E. M. Dianov,²⁾ V. F. Khopin,⁴⁾ and A. N. Guryanov⁴⁾

¹⁾Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim, Norway

²⁾Fiber Optics Research Center, Russian Academy of Sciences, 38 Vavilov Street, 119333 Moscow, Russia

³⁾Institut für Photonik, TU Wien, Gusshausstrasse 27/387, A-1040 Vienna, Austria.

⁴⁾Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, 49 Tropinin Street, 603600 Nizhny Novgorod, Russia

^*Corresponding author: sorokina@ntnu.no