Universal Kerr-thermal dynamics of self-injection-locked microresonator dark pulses

Abstract

Microcombs, formed in optical microresonators driven by continuous-wave lasers, are miniaturized optical frequency combs. Leveraging integrated photonics and laser self-injection locking (SIL), compact microcombs can be constructed via hybrid integration of a semiconductor laser with a chip-based microresonator. While the current linear SIL theory has successfully addressed the linear coupling between the laser cavity and the external microresonator, it fails to describe the complicated nonlinear processes, especially for dark-pulse microcomb formation. Here, we investigate -- theoretically, numerically and experimentally -- the Kerr-thermal dynamics of a semiconductor laser self-injection-locked to an integrated silicon nitride microresonator. We unveil intriguing yet universal dark-pulse formation and switching behaviour with discrete steps, and establish a theoretical model scrutinizing the synergy of laser-microresonator mutual coupling, Kerr nonlinearity and photo-thermal effect. Numerical simulation confirms the experimental result and identifies the origins. Exploiting this unique phenomenon, we showcase an application on low-noise photonic microwave generation with phase noise purified by 23.5 dB. Our study not only adds critical insight of pulse formation in laser-microresonator hybrid systems, but also enables all-passive, photonic-chip-based microwave oscillators with high spectral purity.

arXiv comment7 pages and 3 figures of the manuscript

References in corpus (41)

• Optical frequency comb generation from a monolithic microresonator
• Temporal solitons in optical microresonators
• All-optical signal processing platforms for CMOS compatible integrated nonlinear optics
• 20 years of developments in optical frequency comb technology and applications
• Photonic chip based optical frequency comb using soliton induced Cherenkov radiation
• Generation of Ultrastable Microwaves via Optical Frequency Division
• Monolithic Ultrahigh-Q Lithium Niobate Microring Resonator
• Fully integrated ultra-low power Kerr comb generation
• Mode interaction aided excitation of dark solitons in microresonators constructed of normal dispersion waveguides
• Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high-$Q$ microresonators
• Universal dynamics and controlled switching of dissipative Kerr solitons in optical microresonators
• Nanophotonic soliton-based microwave synthesizers
• Photonic microwave signals with zeptosecond level absolute timing noise
• Thermally Controlled Comb Generation and Soliton Modelocking in Microresonators
• High-yield wafer-scale fabrication of ultralow-loss, dispersion-engineered silicon nitride photonic circuits
• Laser soliton microcombs on silicon
• Octave-spanning dissipative Kerr soliton frequency combs in $S{i}_3{N}_4$ microresonators
• Microresonator Kerr frequency combs with high conversion efficiency
• High-order coherent communications using mode-locked dark-pulse Kerr combs from microresonators
• Frequency combs and platicons in optical microresonators with normal GVD
• Single-mode dispersive waves and soliton microcomb dynamics
• Dynamics of soliton self-injection locking in a photonic chip-based microresonator
• Mode-locked ultrashort pulse generation from on-chip normal dispersion microresonators
• 300 GHz wave with attosecond-level timing noise
• Ultralow-Noise Photonic Microwave Synthesis using a Soliton Microcomb-based Transfer Oscillator
• Bringing short-lived dissipative Kerr soliton states in microresonators into a steady state
• Recent Advances in Laser Self-Injection Locking to High-$Q$ Microresonators
• Platicon microcomb generation using laser self-injection locking
• Origin and stability of dark pulse Kerr combs in normal dispersion resonators
• Foundry manufacturing of tight-confinement, dispersion-engineered, ultralow-loss silicon nitride photonic integrated circuit
• Spectral purification of microwave signals with disciplined dissipative Kerr solitons
• Terahertz wave generation using a soliton microcomb
• Towards high-power, high-coherence, integrated photonic mmWave platform with microcavity solitons
• Probing material absorption and optical nonlinearity of integrated photonic materials
• Switching dynamics of dark-pulse Kerr comb states in optical microresonators
• Numerical study of solitonic pulse generation in the self-injection locking regime at normal and anomalous group velocity dispersion
• Dynamics of platicons due to third-order dispersion
• A chip-integrated comb-based microwave oscillator
• A wideband, high-resolution vector spectrum analyzer for integrated photonics
• Self-regulating soliton domain walls in microresonators
• A chip-based optoelectronic-oscillator frequency comb