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23 October 2018 Wideband bright-soliton frequency-comb generation at optical telecommunication wavelength in a thin silicon nitride film
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Abstract
Bright-soliton frequency comb generation in a thin-film silicon nitride microresonator at optical telecommunication wavelengths is numerically demonstrated using our recently developed approach for dispersion engineering by virtue of coupling dispersion between two coupled microresonators. By coupling two identical resonators through an asymmetric Mach–Zehnder structure, sinusoidal splitting of the resonance frequencies can be achieved. This enables the engineering of the dispersion of the resulting modes of the coupled structure. Using this approach, anomalous dispersion of the resonant modes can be achieved at the pumping wavelength (which is selected to be the optical telecommunication wavelength, i.e., 1.55  μm) to enable Kerr-comb generation. In addition, by utilizing soliton-induced Cherenkov radiation in the coupled-resonator structure, we can increase the bandwidth of the resulting Kerr-comb signal.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 1934-2608/2018/$25.00 © 2018 SPIE
Ali Eshaghian Dorche, Amir Hossein Hosseinnia, Ali Asghar Eftekhar, and Ali Adibi "Wideband bright-soliton frequency-comb generation at optical telecommunication wavelength in a thin silicon nitride film," Journal of Nanophotonics 12(4), 046008 (23 October 2018). https://doi.org/10.1117/1.JNP.12.046008
Received: 7 June 2018; Accepted: 28 September 2018; Published: 23 October 2018
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