1. G. G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, St. Tropinina 49, 603951 Nizhny Novgorod, Russia
2. Prokhorov General Physics Institute of the Russian Academy of Sciences, St. Vavilova 38, 119991 Moscow, Russia
3. Prokhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, St. Vavilova 38, 119333 Moscow, Russia