Photonic integrated beam delivery in a rubidium 3D magneto-optical trap

Abstract

Cold atoms are important for precision atomic applications including timekeeping and sensing. The 3D magneto-optical trap (3D-MOT), used to produce cold atoms, will benefit from photonic integration to improve reliability and reduce size, weight, and cost. These traps require the delivery of multiple, large area, collimated laser beams to an atomic vacuum cell. Yet, to date, beam delivery using an integrated waveguide approach has remained elusive. We report the demonstration of a 87Rb 3D-MOT using a fiber-coupled photonic integrated circuit to deliver all beams to cool and trap > 1 x 10^6 atoms to near 200 μK. The silicon nitride photonic circuit transforms fiber-coupled 780 nm cooling and repump light via waveguides to three mm-width non-diverging free-space cooling and repump beams directly to the rubidium cell. This planar, CMOS foundry-compatible integrated beam delivery is compatible with other components, such as lasers and modulators, promising system-on-chip solutions for cold atom applications.

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Cited by in corpus (18)

• Anneal-free ultra-low loss silicon nitride integrated photonics
• 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
• High-Performance Silicon Photonic Single-Sideband Modulators for Cold Atom Interferometry
• Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser
• Grating magneto-optical traps with complicated level structures
• Soliton microcombs in X-cut LiNbO3 microresonators
• Scalable and Robust Beam Shaping Using Apodized Fish-bone Grating Couplers
• Chip-scale sub-Doppler atomic spectroscopy enabled by a metasurface integrated photonic emitter
• An alkali-referenced vector spectrum analyzer for visible-light integrated photonics
• Proposal of a free-space-to-chip pipeline for transporting single atoms
• On-chip 7 GHz acousto-optic modulators for visible wavelengths
• A high-flux cold-atom source utilising a grating atom chip
• Thermally Induced Refractive Index Trimming of Visible-Light Silicon Nitride Waveguides Using Suspended Heaters
• Polarization Decoupling Multi-Port Beam-Splitting Metasurface for Miniaturized Magneto-Optical Trap
• Octave Spanning Visible to SWIR Integrated Coil-Stabilized Brillouin Lasers
• Stimulated Laser Cooling Using Microfabrication
• Broadband acousto-optic modulators on Silicon Nitride
• Grating magneto-optical trap of cesium atoms with an additional retroreflected laser beam