Visible light photonic integrated Brillouin laser

Abstract

Narrow linewidth visible light lasers are critical for atomic, molecular and optical (AMO) applications including atomic clocks, quantum computing, atomic and molecular spectroscopy, and sensing. Historically, such lasers are implemented at the tabletop scale, using semiconductor lasers stabilized to large optical reference cavities. Photonic integration of high spectral-purity visible light sources will enable experiments to increase in complexity and scale. Stimulated Brillouin scattering (SBS) is a promising approach to realize highly coherent on-chip visible light laser emission. While progress has been made on integrated SBS lasers at telecommunications wavelengths, barriers have existed to translate this performance to the visible, namely the realization of Brillouin-active waveguides in ultra-low optical loss photonics. We have overcome this barrier, demonstrating the first visible light photonic integrated SBS laser, which operates at 674 nm to address the 88Sr+ optical clock transition. To guide the laser design, we use a combination of multi-physics simulation and Brillouin spectroscopy in a 2 meter spiral waveguide to identify the 25.110 GHz first order Stokes frequency shift and 290 MHz gain bandwidth. The laser is implemented in an 8.9 mm radius silicon nitride all-waveguide resonator with 1.09 dB per meter loss and Q of 55.4 Million. Lasing is demonstrated, with an on-chip 14.7 mW threshold, a 45% slope efficiency, and linewidth narrowing as the pump is increased from below threshold to 269 Hz. To illustrate the wavelength flexibility of this design, we also demonstrate lasing at 698 nm, the wavelength for the optical clock transition in neutral strontium. This demonstration of a waveguide-based, photonic integrated SBS laser that operates in the visible, and the reduced size and sensitivity to environmental disturbances, shows promise for diverse AMO applications.

arXiv comment23 pages, 10 figures

References in corpus (24)

• Quantum sensing
• Quantum-State Controlled Chemical Reactions of Ultracold KRb Molecules
• Systematic evaluation of an atomic clock at 2e-18 total uncertainty
• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• High-fidelity control and entanglement of Rydberg atom qubits
• Integrated Waveguide Brillouin Laser
• Sub-Hz Linewidth Photonic-Integrated Brillouin Laser
• Compact, thermal-noise-limited optical cavity for diode laser stabilization at 1 x 10-15
• Integrated multi-wavelength control of an ion qubit
• An Optical Tweezer Array of Ultracold Molecules
• 422 Million Q Planar Integrated All-Waveguide Resonator with a 3.4 Billion Absorption Limited Q and Sub-MHz Linewidth
• Electrically-driven Acousto-optics and Broadband Non-reciprocity in Silicon Photonics
• Bridging ultra-high-Q devices and photonic circuits
• Direct Laser Cooling of a Symmetric Top Molecule
• Observation of stimulated Brillouin scattering in silicon nitride integrated waveguides
• Polyatomic Molecules as Quantum Sensors for Fundamental Physics
• Integrated microwave acousto-optic frequency shifter on thin-film lithium niobate
• Acoustic confinement and Stimulated Brillouin Scattering in integrated optical waveguides
• Fundamental noise dynamics in cascaded-order Brillouin lasers
• Probing Fundamental Symmetries of Deformed Nuclei in Symmetric Top Molecules
• Enhanced Yield from a Cryogenic Buffer Gas Beam Source via Excited State Chemistry
• On-chip thermo-optic tuning of suspended microresonators
• Electron electric dipole moment searches using clock transitions in ultracold molecules
• A tweezer clock with half-minute atomic coherence at optical frequencies and high relative stability

Cited by in corpus (18)

• Photonic integrated beam delivery in a rubidium 3D magneto-optical trap
• Anneal-free ultra-low loss silicon nitride integrated photonics
• Silicon nitride stress-optic microresonator modulator for optical control applications
• Chip-Scale, Sub-Hz Fundamental Sub-kHz Integral Linewidth 780 nm Laser through Self-Injection-Locking a Fabry-Pérot laser to an Ultra-High Q Integrated Resonator
• Widely-tunable and narrow-linewidth hybrid-integrated diode laser at 637 nm
• Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser
• Cross-Polarized Stimulated Brillouin Scattering in Lithium Niobate Waveguides
• All-optical nonlinear activation function based on stimulated Brillouin scattering
• Large evanescently-induced Brillouin scattering at the surrounding of a nanofibre
• Long-term absolute frequency stabilization of a hybrid-integrated InP-Si3N4 diode laser
• An alkali-referenced vector spectrum analyzer for visible-light integrated photonics
• On-chip 7 GHz acousto-optic modulators for visible wavelengths
• The influence of phonon harmonicity on spectrally pure resonant Stokes fields
• Octave Spanning Visible to SWIR Integrated Coil-Stabilized Brillouin Lasers
• Parasitic loss in microring-waveguide coupling and its impact on wideband nonlinear photonics
• Slow Light through Brillouin Scattering in Continuum Quantum Optomechanics
• Thermal and driven noise in Brillouin Lasers
• Integrated Reference Cavity for Dual-mode Optical Thermometry and Frequency Stabilization