1. National University for Information Technology; Mechanics and Optics (ITMO); Kronverkskiy, 49 St. Petersburg 197101 Russia
2. Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Ulyanovsk branch); Goncharov str., 48 Ulyanovsk 432011 Russia
3. Ulyanovsk State University; L. Tolstoy-str., 42 Ulyanovsk 432017 Russia
4. Department of Physics; King's College London, Strand; London WC2R 2LS United Kingdom
5. Nonlinear Physics Center; Australian National University; Canberra ACT 0200 Australia