Near-visible integrated soliton microcombs with detectable repetition rates

Peng Liu, Qing-Xin Ji, Jin-Yu Liu, Jinhao Ge, Mingxiao Li, Joel Guo, Warren Jin, Maodong Gao, Yan Yu, Avi Feshali, Mario Paniccia, John E. Bowers and Kerry J. Vahala ()
Additional contact information
Peng Liu: California Institute of Technology
Qing-Xin Ji: California Institute of Technology
Jin-Yu Liu: California Institute of Technology
Jinhao Ge: California Institute of Technology
Mingxiao Li: University of California Santa Barbara
Joel Guo: University of California Santa Barbara
Warren Jin: University of California Santa Barbara
Maodong Gao: California Institute of Technology
Yan Yu: California Institute of Technology
Avi Feshali: Anello Photonics
Mario Paniccia: Anello Photonics
John E. Bowers: University of California Santa Barbara
Kerry J. Vahala: California Institute of Technology

Nature Communications, 2025, vol. 16, issue 1, 1-6

Abstract: Abstract Integrated soliton microcombs benefit a wide range of conventional comb applications through their compactness and scalability. And applications such as optical clocks and biosensing have driven interest in their operation at wavelengths approaching the visible band. However, increasing normal dispersion and optical loss at shorter wavelengths make short pulse operation at low pumping power challenging, especially for detectable-rate microcombs. Here, low-pump-power, detectable-rate soliton microcombs are demonstrated from telecom to visible bands using ultra-low-loss silicon nitride waveguides. Wavelength-multiplexed operation spanning 2/3 octave is also demonstrated in a single device. The results fill a gap needed for realization of integrated self-referenced visible microcombs.

Date: 2025
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DOI: 10.1038/s41467-025-60157-x

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