Self-injection-locked optical parametric oscillator based on microcombs
arXiv:2310.08325 · doi:10.1364/OPTICA.509239
Abstract
Narrow-linewidth yet tunable laser oscillators are one of the most important tools for precision metrology, optical atomic clocks, sensing and quantum computing. Commonly used tunable coherent oscillators are based on stimulated emission or stimulated Brillouin scattering; as a result, the operating wavelength band is limited by the gain media. Based on nonlinear optical gain, optical parametric oscillators (OPOs) enable coherent signal generation within the whole transparency window of the medium used. However, the demonstration of OPO-based Hertz-level linewidth and tunable oscillators has remained elusive. Here, we present a tunable coherent oscillator based on a multimode coherent OPO in a high-Q microresonator, i.e., a microcomb. Single-mode coherent oscillation is realized through self-injection locking (SIL) of one selected comb line. We achieve coarse tuning up to 20 nm, and an intrinsic linewidth down to sub-Hertz level, which is three orders of magnitude lower than the pump. Furthermore, we demonstrate that this scheme results into repetition rate stabilization of the microcomb. These results open exciting possibilities for generating tunable coherent radiation where stimulated emission materials are difficult to obtain, and the stabilization of microcomb sources beyond the limits imposed by the thermorefractive noise in the cavity.
References in corpus (28)
- Optical frequency comb generation from a monolithic microresonator
- Temporal solitons in optical microresonators
- A sub-40 mHz linewidth laser based on a silicon single-crystal optical cavity
- Mode interaction aided excitation of dark solitons in microresonators constructed of normal dispersion waveguides
- Integrated turnkey soliton microcombs operated at CMOS frequencies
- Octave Spanning Frequency Comb on a Chip
- Sub-Hz Linewidth Photonic-Integrated Brillouin Laser
- Integrated Waveguide Brillouin Laser
- Laser Cavity-Soliton Micro-Combs
- Electrically pumped photonic integrated soliton microcomb
- Dynamics of soliton self-injection locking in a photonic chip-based microresonator
- 300 GHz wave with attosecond-level timing noise
- Dissipative Kerr solitons in photonic molecules
- Thermo-refractive noise in silicon nitride microresonators
- Self-Injection Locking and Phase-Locked States in Microresonator-Based Optical Frequency Combs
- Power-efficient soliton microcombs
- Photonic chip-based continuous-travelling-wave parametric amplifier
- Optical linewidth of soliton microcombs
- A combination of continuous-wave optical parametric oscillator and femtosecond frequency comb for optical frequency metrology
- Widely tunable, narrow linewidth external-cavity gain chip laser for spectroscopy between 1.0 - 1.1 um
- Sideband Injection Locking in Microresonator Frequency Combs
- Thermal noise reduction in soliton microcombs via laser self-cooling
- Sub-kHz linewidth narrowing of a mid-infrared OPO idler frequency by direct cavity stabilization
- Hyperparametric oscillation via bound states in the continuum
- Intra-Cavity Frequency-Doubled VECSEL System for Narrow Linewidth Rydberg EIT Spectroscopy
- 30-Hz relative linewidth watt output power 1.65-m continuous-wave singly resonant optical parametric oscillator
- Photonic chip-based low noise microwave oscillator
- Integrated optical frequency division for stable microwave and mmWave generation