Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep26255
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dc.titleSmooth and flat phase-locked Kerr frequency comb generation by higher order mode suppression
dc.contributor.authorHuang, S.-W
dc.contributor.authorLiu, H
dc.contributor.authorYang, J
dc.contributor.authorYu, M
dc.contributor.authorKwong, D.-L
dc.contributor.authorWong, C.W
dc.date.accessioned2020-10-22T02:59:09Z
dc.date.available2020-10-22T02:59:09Z
dc.date.issued2016
dc.identifier.citationHuang, S.-W, Liu, H, Yang, J, Yu, M, Kwong, D.-L, Wong, C.W (2016). Smooth and flat phase-locked Kerr frequency comb generation by higher order mode suppression. Scientific Reports 6 : 26255. ScholarBank@NUS Repository. https://doi.org/10.1038/srep26255
dc.identifier.issn20452322
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/178911
dc.description.abstractHigh-Q microresonator is perceived as a promising platform for optical frequency comb generation, via dissipative soliton formation. In order to achieve a higher quality factor and obtain the necessary anomalous dispersion, multi-mode waveguides were previously implemented in Si3N4 microresonators. However, coupling between different transverse mode families in multi-mode waveguides results in periodic disruption of dispersion and quality factor, and consequently causes perturbation to dissipative soliton formation and amplitude modulation to the corresponding spectrum. Careful choice of pump wavelength to avoid the mode crossing region is thus critical in conventional Si3N4 microresonators. Here, we report a novel design of Si3N4 microresonator in which single-mode operation, high quality factor, and anomalous dispersion are attained simultaneously. The novel microresonator is consisted of uniform single-mode waveguides in the semi-circle region, to eliminate bending induced mode coupling, and adiabatically tapered waveguides in the straight region, to avoid excitation of higher order modes. The intrinsic quality factor of the microresonator reaches 1.36 × 106 while the group velocity dispersion remains to be anomalous at -50 fs2/mm. With this novel microresonator, we demonstrate that broadband phase-locked Kerr frequency combs with flat and smooth spectra can be generated by pumping at any resonances in the optical C-band. © 2016, Nature Publishing Group. All rights reserved.
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceUnpaywall 20201031
dc.typeArticle
dc.contributor.departmentELECTRICAL AND COMPUTER ENGINEERING
dc.description.doi10.1038/srep26255
dc.description.sourcetitleScientific Reports
dc.description.volume6
dc.description.page26255
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