Intracavity characterization of micro-comb generation in the single-soliton regime

Abstract

Soliton formation in on-chip micro-comb generation balances cavity dispersion and nonlinearity and allows coherent, low-noise comb operation. We study the intracavity waveform of an on-chip microcavity soliton in a silicon nitride microresonator configured with a drop port. Whereas combs measured at the through port are accompanied by a very strong pump line which accounts for >99% of the output power, our experiments reveal that inside the microcavity, most of the power is in the soliton. Time-domain measurements performed at the drop port provide information that directly reflects the intracavity field. Data confirm a train of bright, close to bandwidth-limited pulses, accompanied by a weak continuous wave (CW) background with a small phase shift relative to the comb.

References in corpus (2)

• Optical combs with a crystalline whispering gallery mode resonator
• Mode-locked ultrashort pulse generation from on-chip normal dispersion microresonators

Cited by in corpus (8)

• Soliton Microcomb Range Measurement
• μW-Level Microresonator Solitons with Extended Stability Range Using an Auxiliary Laser
• Vernier spectrometer using counter-propagating soliton microcombs
• Synchronization of coupled optical microresonators
• From the Lugiato-Lefever equation to microresonator based soliton Kerr frequency combs
• Towards visible soliton microcomb generation
• Counter-rotating cavity solitons in a silicon nitride microresonator
• Characterizing pump line phase offset of a single-soliton Kerr comb by dual comb interferometry