Impact of stimulated Raman scattering on dark soliton generation in a silica microresonator
AffiliationWyant College of Optical Sciences, The University of Arizona
Department of Biomedical Engineering, The University of Arizona
Keywordsavoided mode crossing
optical frequency comb
stimulated Raman scattering
MetadataShow full item record
PublisherInstitute of Physics
CitationChoi, G., & Su, J. (2022). Impact of stimulated Raman scattering on dark soliton generation in a silica microresonator. Journal of Physics: Photonics, 5(1), 014001.
Rights© 2022 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
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AbstractGenerating a coherent optical frequency comb at an arbitrary wavelength is important for fields such as precision spectroscopy and optical communications. Dark solitons which are coherent states of optical frequency combs in normal dispersion microresonators can extend the operating wavelength range of these combs. While the existence and dynamics of dark solitons has been examined extensively, requirements for the modal interaction for accessing the soliton state in the presence of a strong Raman interaction at near visible wavelengths has been less explored. Here, analysis on the parametric and Raman gain in a silica microresonator is performed, revealing that four-wave mixing parametric gain which can be created by a modal-interaction-aided additional frequency shift is able to exceed the Raman gain. The existence range of the dark soliton is analyzed as a function of pump power and detuning for given modal coupling conditions. We anticipate these results will benefit fields requiring optical frequency combs with high efficiency and selectable wavelength such as biosensing applications using silica microcavities that have a strong Raman gain in the normal dispersion regime. © 2022 The Author(s). Published by IOP Publishing Ltd.
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Except where otherwise noted, this item's license is described as © 2022 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.