Topological Soliton Frequency Comb in Nanophotonic Lithium Niobate
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
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2025
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| author | Englebert, Nicolas Gray, Robert M. Ledezma, Luis Sekine, Ryoto Zacharias, Thomas Ramesh, Rithvik Gutierrez, Benjamin K. Parra-Rivas, Pedro Marandi, Alireza |
| author_facet | Englebert, Nicolas Gray, Robert M. Ledezma, Luis Sekine, Ryoto Zacharias, Thomas Ramesh, Rithvik Gutierrez, Benjamin K. Parra-Rivas, Pedro Marandi, Alireza |
| contents | Frequency combs have revolutionized metrology, ranging, and optical clocks, which have motivated substantial efforts on the development of chip-scale comb sources. The on-chip comb sources are currently based on electro-optic modulation, mode-locked lasers, quantum cascade lasers, or soliton formation via Kerr nonlinearity. However, the widespread deployment of on-chip comb sources has remained elusive as they still require RF sources, high-Q resonators, or complex stabilization schemes while facing efficiency challenges. Here, we demonstrate an on-chip source of frequency comb based on the integration of a lithium niobate nanophotonic circuit with a semiconductor laser that can alleviate these challenges. For the first time, we show the formation of temporal topological solitons in a on-chip nanophotonic parametric oscillator with quadratic nonlinearity and low finesse. These solitons, independent of the dispersion regime, consist of phase defects separating two $π$-out-of-phase continuous wave solutions at the signal frequency, which is at half the input pump frequency. We use on-chip cross-correlation for temporal measurements and confirm formation of topological solitons as short as 60 fs around 2 $μ$m, in agreement with a generalized parametrically forced Ginzburg-Landau theory. Moreover, we demonstrate a proof-of-concept turn-key operation of a hybrid-integrated source of topological frequency comb. Topological solitons offer a new paradigm for integrated comb sources, which are dispersion-sign agnostic and do not require high-Q resonators or high-speed modulators and can provide access to hard-to-access spectral regions, including mid-infrared. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_01856 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Topological Soliton Frequency Comb in Nanophotonic Lithium Niobate Englebert, Nicolas Gray, Robert M. Ledezma, Luis Sekine, Ryoto Zacharias, Thomas Ramesh, Rithvik Gutierrez, Benjamin K. Parra-Rivas, Pedro Marandi, Alireza Optics Pattern Formation and Solitons Frequency combs have revolutionized metrology, ranging, and optical clocks, which have motivated substantial efforts on the development of chip-scale comb sources. The on-chip comb sources are currently based on electro-optic modulation, mode-locked lasers, quantum cascade lasers, or soliton formation via Kerr nonlinearity. However, the widespread deployment of on-chip comb sources has remained elusive as they still require RF sources, high-Q resonators, or complex stabilization schemes while facing efficiency challenges. Here, we demonstrate an on-chip source of frequency comb based on the integration of a lithium niobate nanophotonic circuit with a semiconductor laser that can alleviate these challenges. For the first time, we show the formation of temporal topological solitons in a on-chip nanophotonic parametric oscillator with quadratic nonlinearity and low finesse. These solitons, independent of the dispersion regime, consist of phase defects separating two $π$-out-of-phase continuous wave solutions at the signal frequency, which is at half the input pump frequency. We use on-chip cross-correlation for temporal measurements and confirm formation of topological solitons as short as 60 fs around 2 $μ$m, in agreement with a generalized parametrically forced Ginzburg-Landau theory. Moreover, we demonstrate a proof-of-concept turn-key operation of a hybrid-integrated source of topological frequency comb. Topological solitons offer a new paradigm for integrated comb sources, which are dispersion-sign agnostic and do not require high-Q resonators or high-speed modulators and can provide access to hard-to-access spectral regions, including mid-infrared. |
| title | Topological Soliton Frequency Comb in Nanophotonic Lithium Niobate |
| topic | Optics Pattern Formation and Solitons |
| url | https://arxiv.org/abs/2511.01856 |