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arXiv · 2511.21059

A universal framework for nonlinear frequency combs under electro-optic modulation

Yanyun Xue·Xianpeng Lv·Guangxing Wu·Tianqi Lei·Chenyang Cao·Yiming Lei·Min Wang·Zhendong Zhu·Yan Li·Qihuang Gong·Di Zhu·Yaowen Hu
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Abstract

Nonlinear frequency combs, including electro-optic and Kerr combs, have become central platforms for chip-scale frequency synthesis. Recent breakthroughs in strong-coupling electro-optic modulation further expanded their accessible nonlinear dynamics, unlocking new phenomena and functionalities, but the underlying foundation remains largely unexplored. Here we establish a universal theoretical and experimental framework for nonlinear combs under arbitrary electro-optic modulation by introducing a general evolution equation (GEE) that transcends the mean-field Lugiato-Lefever equation. The GEE reduces to a discrete-time Integration Hamiltonian that provides a frequency-domain formalism unifying strong-coupling electro-optic modulation with photonic synthetic dimensions. Together with a band-wave correspondence linking modulation waveforms to synthetic band structures, the formalism enables programmable spectral control. We further show compatibility between Kerr nonlinearity and strong-coupling electro-optic modulation, highlighting their cooperative dynamics. Our work provides a foundational model for strong-coupling electro-optics in nonlinear combs, opening a route toward chip-integrated, microwave-programmable comb sources for metrology, spectroscopy, and emerging photonic technologies.

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Yanyun Xue, Xianpeng Lv, Guangxing Wu, Tianqi Lei, Chenyang Cao, Yiming Lei, Min Wang, Zhendong Zhu, Yan Li, Qihuang Gong, Di Zhu, Yaowen Hu. 2025-11-26. A universal framework for nonlinear frequency combs under electro-optic modulation. https://arxiv.org/abs/2511.21059

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