Frequency control of a lattice laser at 759 nm by referencing to Yb clock transition at 578 nm

作者：Hao, Yaqin; Yao, Yuan^*; Shi, Haosen; Yu, Hongfu; Jiang, Yanyi; Ma, Longsheng

来源：Chinese Optics Letters, 2022, 20(12): 120201.

DOI：10.3788/COL202220.120201

• optical clock
• optical frequency comb
• laser frequency stabilization

We present the frequency control of a 759 nm laser as a lattice laser for an ytterbium (Yb) optical clock. The frequency stability and accuracy are transferred from the Yb optical clock via an optical frequency comb. Although the comb is frequency-stabilized on a rubidium microwave clock, the frequency instability of the 759 nm laser is evaluated at the 10-15 level at 1 s averaging time. The frequency of the 759 nm laser is controlled with an uncertainty within 1 Hz by referencing to the Yb clock transition. Such a frequency-controlled 759 nm laser is suitable for Yb optical clocks as the lattice laser. The technique of laser frequency control can be applied to other lasers in optical clocks.

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