Stable Kerr frequency combs excited in the vicinity of strong modal dispersion disruptions

Hossein Taheri; Anatoliy Savchenkov; Andrey B. Matsko

doi:10.1117/12.2652926

15 March 2023 Stable Kerr frequency combs excited in the vicinity of strong modal dispersion disruptions

Hossein Taheri, Anatoliy Savchenkov, Andrey B. Matsko

Proceedings Volume 12407, Laser Resonators, Microresonators, and Beam Control XXV; 1240709 (2023) https://doi.org/10.1117/12.2652926
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

Optical microresonators possessing Kerr-type nonlinearity have emerged over the past decade as reliable and versatile sources of optical frequency combs, with varied applications including in the generation of low-phasenoise radio frequency (RF) signals, small-footprint precision timekeeping, and LiDAR. One of the key parameters affecting Kerr microcomb generation in different wavelength ranges is cavity modal dispersion. Dispersion effects such as avoided mode crossings (AMCs) have been shown to greatly limit mode-locked microcomb generation, especially when pumping in close proximity to such disruptions. We present numerical modeling and experimental evidence demonstrating that using an auxiliary laser pump can suppress the detrimental impact of near-pump AMCs. We also report, for the first time to our knowledge, the possibility of the breaking of characteristic soliton steps into two stable branches corresponding to different stable pulse trains arising from the interplay of dichromatic pumping and AMCs. These findings bear significance, particularly for the generation of frequency combs in larger resonators or at smaller wavelengths, such as the visible range, where the cavities become overmoded.

Conference Presentation

Citation Download Citation

Hossein Taheri, Anatoliy Savchenkov, and Andrey B. Matsko "Stable Kerr frequency combs excited in the vicinity of strong modal dispersion disruptions", Proc. SPIE 12407, Laser Resonators, Microresonators, and Beam Control XXV, 1240709 (15 March 2023); https://doi.org/10.1117/12.2652926

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