Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 35, Issue 4, Pages 892-898Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.35.000892
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/N003527/1]
- EPSRC [EP/N003527/1] Funding Source: UKRI
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Quantum information processing using atomic qubits requires narrow linewidth lasers with long-term stability for high-fidelity coherent manipulation of Rydberg states. In this paper, we report on the construction and characterization of three continuous-wave narrow linewidth lasers stabilized simultaneously to an ultra-high finesse Fabry-Perot cavity made of ultra-low expansion glass, with a tunable offset-lock frequency. One laser operates at 852 nm, while the two locked lasers at 1018 nm are frequency doubled to 509 nm for excitation of Cs-133 atoms to Rydberg states. The optical beat note at 509 nm is measured to be 260(5) Hz. We present measurements of the offset between the atomic and cavity resonant frequencies using electromagnetically induced transparency for high-resolution spectroscopy on a cold atom cloud. The long-term stability is determined from repeated spectra over a period of 20 days, yielding a linear frequency drift of similar to 1 Hz/s.
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