| ATOMIC AND MOLECULAR PHYSICS |
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Magic Wavelength Measurement of the $^{87}$Sr Optical Lattice Clock at NIM |
| Qiang Wang1,2**, Yi-Ge Lin1, Fei Meng1,3, Ye Li1,2, Bai-Ke Lin1,2, Er-Jun Zang1, Tian-Chu Li1, Zhan-Jun Fang1 |
1National Institute of Metrology, Beijing 100029
2Department of Precision Instrument, Tsinghua University, Beijing 100084
3School of Electronics Engineering and Computer Science, Peking University, Beijing 100871
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| Cite this article: |
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Qiang Wang, Yi-Ge Lin, Fei Meng et al 2016 Chin. Phys. Lett. 33 103201 |
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Abstract We report on the magic wavelength measurement of our optical lattice clock based on fermion strontium atoms at the National Institute of Metrology (NIM). A Ti:sapphire solid state laser locked to a reference cavity inside a temperature-stabilized vacuum chamber is employed to generate the optical lattice. The laser frequency is measured by an erbium fiber frequency comb. The trap depth is modulated by varying the lattice laser power via an acousto-optic modulator. We obtain the frequency shift coefficient at this lattice wavelength by measuring the differential frequency shift of the clock transition of the strontium atoms at different trap depths, and the frequency shift coefficient at this lattice wavelength is obtained. We measure the frequency shift coefficients at different lattice frequencies around the magic wavelength and linearly fit the measurement data, and the magic wavelength is calculated to be 368554672(44) MHz.
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Received: 26 April 2016
Published: 27 October 2016
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| PACS: |
32.60.+i
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(Zeeman and Stark effects)
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37.10.Jk
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(Atoms in optical lattices)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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45.50.Tn
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(Collisions)
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| Fund: Supported by the National Natural Science Foundation of China under Grant No 91336212. |
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