Soliton repetition rate in a silicon-nitride microresonator

Abstract

The repetition rate of a Kerr comb comprising a single soliton in an anomalous dispersion silicon nitride microcavity is measured as a function of pump frequency tuning. The contributions from the Raman soliton self-frequency shift (SSFS) and from thermal effects are evaluated both experimentally and theoretically; the SSFS is found to dominate the changes in repetition rate. The relationship between the changes in repetition rate and pump frequency detuning is found to be independent of the nonlinearity coefficient and dispersion of the cavity. Modeling of the repetition rate change by using the generalized Lugiato-Lefever equation is discussed; the Kerr shock is found to have only a minor effect on repetition rate for cavity solitons with duration down to ~50 fs.

References in corpus (10)

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• Optical linewidth of soliton microcombs
• Gain-switched semiconductor laser driven soliton microcombs
• Harnessing Dispersion in Soliton Microcombs to Mitigate Thermal Noise
• Observation of Arnold Tongues in Coupled Soliton Kerr Frequency Combs
• Forced Oscillatory Motion of Trapped Counter-Propagating Solitons
• Polarization multiplexed dissipative Kerr solitons in on-chip micro-resonator
• Characterizing pump line phase offset of a single-soliton Kerr comb by dual comb interferometry