A tunable CW UV laser with <35 kHz absolute frequency instability for precision spectroscopy of Sr Rydberg states

Abstract

We present a solid-state laser system that generates over 200 mW of continuous-wave, narrowband light, tunable from 316.3 nm - 317.7 nm and 318.0 nm - 319.3 nm. The laser is based on commercially available fiber amplifiers and optical frequency doubling technology, along with sum frequency generation in a periodically poled stoichiometric lithium tantalate crystal. The laser frequency is stabilized to an atomic-referenced high finesse optical transfer cavity. Using a GPS-referenced optical frequency comb we measure a long term frequency instability of $<$35 kHz for timescales between $10^{-3}$ s and $10^3$ s. As an application we perform spectroscopy of Sr Rydberg states from $n$ = 37 - 81, demonstrating mode-hop-free scans of 24 GHz. In a cold atomic sample we measure Doppler-limited linewidths of 350 kHz.

arXiv comment12 pages, 4 figures

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Cited by in corpus (15)

• Alkaline earth atoms in optical tweezers
• Quantum and Nonlinear Optics in Strongly Interacting Atomic Ensembles
• Sub-kHz excitation lasers for Quantum Information Processing with Rydberg atoms
• A Rydberg-dressed Magneto-Optical Trap
• Spectroscopy of ${}^{87}\text{Sr}$ triplet Rydberg states
• Measurement of the strontium triplet Rydberg series by depletion spectroscopy of ultracold atoms
• Development and characterization of a 2.2 W narrow-linewidth 318.6 nm ultraviolet laser
• A 3-photon process for producing a degenerate gas of metastable alkaline-earth atoms
• Difference-frequency combs in cold atom physics
• Coulomb anti-blockade in a Rydberg dressed gas
• A tunable low-drift laser stabilized to an atomic reference
• Search for vector dark matter in microwave cavities with Rydberg atoms
• Extended Bose-Hubbard models with Rydberg macrodimer dressing
• Ultratight confinement of atoms in a Rydberg empowered optical lattice
• High-Power, Fiber-Laser-Based Source for Magic-Wavelength Trapping in Neutral-Atom Optical Clocks