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arXiv · 2601.07378

Intraresonance frequency combs in Kerr microresonators

Andrei N. Danilin·Timur R. Yunusov·Ekaterina S. Vahnitskaya·Alexey P. Dushanin·Sanli Huang·Zhenyuan Shang·Junqiu Liu·Anatoly V. Masalov·Dmitry A. Chermoshentsev·Igor A. Bilenko
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Abstract

For more than 20 years, optical microresonators have served as the backbone of integrated nonlinear photonics, exploiting Kerr nonlinearity to generate octave-spanning frequency combs, enable quantum effects, and drive optical parametric oscillators. Since the inception of microresonator-based nonlinear optics, related studies have focused primarily on regimes in which photons with distinct resonant modes can interact. Although multiple comb lines can occupy a single resonance during the Kerr comb formation process, their mutual interactions have remained largely unexplored. Here we demonstrate a Kerr comb formation that is confined to a single resonance of a microresonator via dual-pumping. MHz-scale comb-line spacing reveals previously unobserved Kerr-comb dynamics, featuring parametrically driven phase multistability that can be observed directly in the temporal domain. Two laser pumps serve as phase-coupled references for heterodyne read-out, simplifying the measurements.

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Andrei N. Danilin, Timur R. Yunusov, Ekaterina S. Vahnitskaya, Alexey P. Dushanin, Sanli Huang, Zhenyuan Shang, Junqiu Liu, Anatoly V. Masalov, Dmitry A. Chermoshentsev, Igor A. Bilenko. 2026-01-12. Intraresonance frequency combs in Kerr microresonators. https://arxiv.org/abs/2601.07378

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