Thermal noise reduction in soliton microcombs via laser self-cooling

Abstract

Thermal noise usually dominates the low-frequency region of the optical phase noise of soliton microcombs, leading to decoherence and limiting many aspects of applications. In this work, we demonstrate a simple and reliable way to mitigate this noise by laser cooling with the pump laser. The key is rendering the pump laser to simultaneously excite two neighboring cavity modes from different families that are respectively red and blue detuned, one for soliton generation and the other one for laser cooling.

References in corpus (5)

• Microresonator Soliton Dual-Comb Spectroscopy
• Stably accessing octave-spanning microresonator frequency combs in the soliton regime
• Thermo-refractive noise in silicon nitride microresonators
• High-Q Si3N4 microresonators based on a subtractive processing for Kerr nonlinear optics
• Simultaneous radiation pressure induced heating and cooling of an opto-mechanical resonator

Cited by in corpus (11)

• Recent Advances in Laser Self-Injection Locking to High-$Q$ Microresonators
• Foundry manufacturing of tight-confinement, dispersion-engineered, ultralow-loss silicon nitride photonic integrated circuit
• Dual-mode microresonators as straightforward access to octave-spanning dissipative Kerr solitons
• Low phase noise THz generation from a fiber-referenced Kerr microresonator soliton comb
• Programmable access to microresonator solitons with modulational sideband heating
• Self-injection-locked optical parametric oscillator based on microcombs
• Optical microcombs in whispering gallery mode crystalline resonators with dispersive intermode interactions
• Cooling of an Integrated Brillouin Laser below the Thermal Limit
• Self-cooling, blue-detuned dissipative Kerr microresonator soliton comb
• Octave-spanning, deterministic single soliton generation in 4H-silicon carbide-on-insulator microring resonators
• Thermally accessible broadband soliton microcombs in silicon carbide enabled by dynamic polarization control