Walk-off controlled self-starting frequency combs in ${\chi }^{(2)}$ optical microresonators

Sergey Smirnov, Boris Sturman, Evgeny Podivilov +1

Investigations of frequency combs in ${\chi }^{(3)}$ optical microresonators are burgeoning nowadays. Changeover to ${\chi }^{(2)}$ resonators promises further advances and brings new challeng…