Kerr-induced synchronization (KIS) provides a key tool for the control and stabilization of a dissipative Kerr soliton (DKS) frequency comb, enabled by the capture of a comb tooth by an injected reference laser. Efficient KIS relies on large locking bandwidth, meaning both the comb tooth and intracavity reference power need to be sufficiently large. Although KIS can theoretically occur at any comb tooth, large modal separations from the main pump to achieve large optical frequency division factors are often difficult or unfeasible due to cavity dispersion. While tailoring the dispersion to generate dispersive waves can support on-resonance KIS far from the main pump, this approach restricts synchronization to specific wavelengths. Here we demonstrate an alternative KIS method that allows efficient synchronization at arbitrary modes by multi-pumping a microresonator. This creates a multicolour DKS with a main and an auxiliary comb, the latter enabling the creation of a synthetic dispersive wave. As cross-phase modulation leads to a unique group velocity for both the soliton comb and the auxiliary comb, repetition rate disciplining of the auxiliary comb through KIS automatically controls the DKS microcomb. We explore this colour-KIS phenomenon theoretically and experimentally, showing control and tuning of the soliton microcomb repetition rate, resulting in optical frequency division independent of the main pump noise properties.

克尔诱导同步 （KIS） 为控制和稳定耗散克尔孤子 （DKS） 频率梳提供了关键工具，通过注入的参考激光捕获梳齿来实现。高效的 KIS 依赖于较大的锁定带宽，这意味着梳齿和腔内参考功率都需要足够大。尽管理论上 KIS 可以发生在任何梳齿上，但由于腔体色散，与主泵浦进行大模态分离以实现大的光分频因子通常很困难或不可行。虽然定制色散以产生色散波可以支持远离主泵浦的导谐 KIS，但这种方法将同步限制为特定波长。在这里，我们演示了另一种 KIS 方法，该方法通过多次泵浦微谐振器来实现任意模式下的高效同步。这会产生一个带有主梳和辅助梳的多色 DKS，后者能够产生合成色散波。由于交叉相位调制导致孤子电梳和辅助电梳具有独特的群速度，因此通过 KIS 对辅助电梳的重复频率分流会自动控制 DKS 微电梳。我们从理论和实验上探讨了这种颜色-KIS现象，展示了对孤子微梳重复率的控制和调整，从而产生独立于主要泵浦噪声特性的光分频。