We experimentally demonstrate bidirectional Raman soliton-like combs in a whispering gallery mode microresonator with a unidirectional pump for the first time, to the best of our knowledge. We develop a relatively simple theoretical model and find an analytical solution for forward- and backward-propagating Raman sech²-shaped solitons in an anomalous dispersion region under unidirectional pumping in a normal dispersion region. Raman solitons exist, thanks to the balance between losses and Raman gain from a CW wave (which is equal in both directions) as well as between dispersion and Kerr nonlinearity.

中文翻译：

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球形微谐振器中具有单向泵的双向拉曼孤子梳

据我们所知，我们首次在带有单向泵的回音壁模式微谐振器中实验演示了双向拉曼孤子梳。我们开发了一个相对简单的理论模型，并找到了在正常色散区域单向泵浦下反常色散区域中正向和反向传播拉曼sech ²形孤子的解析解。由于连续波的损耗和拉曼增益（在两个方向上相等）之间以及色散和克尔非线性之间的平衡，拉曼孤子的存在。