Kerr nonlinearity-assisted quadratic microcomb

Generation of nonlinear frequency combs in χ (3) optical microresonators has attracted tremendous research interest during the last decade. Recently, realization microcomb owing to (2) nonlinearity microresonator promises new breakthroughs and is a big scientific challenge. Moreover, it high that presence both second- third-order nonlinearities results complex cavity dynamics. In particular, role generation quadratic still far from being well understood. Here, we demonstrate interaction between lithium niobate microresonator, which can provide way phase matching control mode-locking condition pulse number for microcomb. Our verify Kerr benefit The principle be further extended other material platforms more manipulation methods comb based on at mid-infrared.