We report a broadband two-dimensional (2D) Kerr and Raman–Kerr frequency comb generation in a silica bottle resonator accounting for azimuthal and axial degrees of freedom and pioneer a method that allows for controlled and reversible switching between a four wave mixing (FWM) state and a stimulated Raman scattering state. The repetition rate of the Raman–Kerr comb is not an integer number of the free spectral range, which spans more than 242 nm with hundreds of teeth. We show that, experimentally and numerically, multiple 2D comb regimes can be selectively accessed via dispersion engineering by exciting different orders of axial modes or modifying the curvature of the axial profile, involving cascaded FWM, Raman lasing, and Raman-assisted FWM. The effect of axial curvature on dispersion is associated with the axial mode number in bottle resonators. Our approach enables dispersion and spectral engineering flexibility in any resonator with localized axial modes.

中文翻译：

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具有可选色散的微瓶谐振器中可控的二维Kerr和Raman–Kerr频率梳

我们报告了石英瓶谐振器中宽带二维（2D）Kerr和Raman–Kerr频率梳的产生，说明了方位角和轴向自由度，并率先提出了一种可在四波混频（FWM）之间进行可控和可逆切换的方法态和受激拉曼散射态。拉曼-克尔梳的重复率不是自由光谱范围的整数，该自由光谱范围跨越242 nm且有数百个牙齿。我们显示，在实验和数值上，可以通过分散工程通过激发不同阶次的轴向模态或修改轴向轮廓的曲率来选择性地访问多个2D梳理，其中包括级联的FWM，拉曼激光和拉曼辅助的FWM。轴向曲率对色散的影响与瓶子谐振器中的轴向模数有关。我们的方法可以在具有局部轴向模式的任何谐振器中实现色散和频谱工程的灵活性。