Light propagating in the topological edge channel of an array of ring resonators is predicted to generate nested frequency combs: like a Matryoshka doll containing a set of smaller dolls, each ‘tooth’ of the comb comprises another frequency comb.

中文翻译：

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俄罗斯套娃频率梳

预计在环形谐振器阵列的拓扑边缘通道中传播的光会产生嵌套的频率梳：就像包含一组较小玩偶的俄罗斯套娃一样，梳子的每个“牙齿”都包含另一个频率梳。