A compact ultranarrow high-power laser system for experiments with 578nm Ytterbium clock transition

Abstract

In this paper we present the realization of a compact, high-power laser system able to excite the Ytterbium clock transition at 578 nm. Starting from an external-cavity laser based on a quantum dot chip at 1156 nm with an intra-cavity electro-optic modulator, we were able to obtain up to 60 mW of visible light at 578 nm via frequency doubling. The laser is locked with a 500 kHz bandwidth to a ultra-low-expansion glass cavity stabilized at its zero coefficient of thermal expansion temperature through an original thermal insulation and correction system. This laser allowed the observation of the clock transition in fermionic ${}^{173}$Yb with a < 50 Hz linewidth over 5 minutes, limited only by a residual frequency drift of some 0.1 Hz/s.

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• Quantum computing with alkaline earth atoms
• Direct observation of coherent inter-orbital spin-exchange dynamics
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Cited by in corpus (7)

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• Measuring absolute frequencies beyond the GPS limit via long-haul optical frequency dissemination
• Sub-kHz excitation lasers for Quantum Information Processing with Rydberg atoms
• State-dependent interactions in ultracold ${}^{174}$Yb probed by optical clock spectroscopy
• Coherent Manipulation of Orbital Feshbach Molecules of Two-Electron Atoms
• Current-feedback-stabilized laser system for quantum simulation experiments using Yb clock transition at 578 nm