Affiliation: | (1) Fiber Optics Research Center, General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119333, Russia;(2) Institute of Automatics and Electrometry, Siberian Division, Russian Academy of Sciences, Universitetskiĭ pr. 1, Novosibirsk, 630090, Russia;(3) Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhni Novgorod, 603950, Russia;(4) Photonics Research Group, Aston University, Birmingham, B4 7ET, UK |