Nonlinear properties of high-Q optical microresonators in normal dispersion range Artem Shitikov, Valery Lobanov, Nikolay Pavlov, Andrey Voloshin, Igor Bilenko and Michael Gorodetsky EPJ Web Conf., 161 (2017) 02025 Published online: 31 October 2017 DOI: 10.1051/epjconf/201716102025