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Microresonator soliton frequency combs via cascaded Brillouin scattering

MPS-Authors
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Zhang,  Shuangyou
Del'Haye Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Bi,  Toby
Del'Haye Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Friedrich-Alexander-Universität Erlangen-Nürnberg, External Organizations;

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Ghalanos,  George N.
Del'Haye Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Zhang,  Yaojing
Del'Haye Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Yan,  Haochen
Del'Haye Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Friedrich-Alexander-Universität Erlangen-Nürnberg, External Organizations;

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Pal,  Arghadeep
Del'Haye Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Friedrich-Alexander-Universität Erlangen-Nürnberg, External Organizations;

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Del'Haye,  Pascal
Del'Haye Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Friedrich-Alexander-Universität Erlangen-Nürnberg, External Organizations;

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Citation

Zhang, H., Zhang, S., Bi, T., Ghalanos, G. N., Zhang, Y., Yan, H., et al. (2023). Microresonator soliton frequency combs via cascaded Brillouin scattering. https://doi.org/10.48550/arXiv.2312.15506.


Cite as: https://hdl.handle.net/21.11116/0000-000E-A9C0-A
Abstract
We demonstrate Kerr soliton frequency comb generation that is seeded by a cascaded Brillouin scattering process. In this process, a pump laser is used to generate multiple orders of Brillouin sidebands in a microresonator, which in turn generate the soliton. In such a process, even orders of Brillouin scattering sidebands are co-propagating with respect to the pump laser while odd orders of Brillouin scattering are backwards propagating. In this work we present the generation of forward propagating Kerr solitons via a forward propagating second order Brillouin scattering process in a fused silica rod resonator. Importantly, we show that the Brillouin scattering process can bridge the gap between different microresonator mode families, such that the repetition rate of the Kerr soliton is independent from the Brillouin gain frequency shift (about 10 GHz in fused silica). In our work we demonstrate this by generating soliton pulse trains with a repetition rate of 107 GHz. Our work opens up a new way for using cascaded Brillouin lasing as a seed for microresonator frequency comb generation. This can be of particular interest for the realization of soliton frequency combs with low noise properties from Brillouin lasing while still having arbitrary repetition rates that are determined by the resonator size. Applications range from optical communication to LIDAR systems and photonic signal generation.