| ATOMIC AND MOLECULAR PHYSICS |
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Absolutely Direct Frequency Measurement of Two-Photon Transition Using Multi-Peak Fitting Approach |
| Shao-Yang Dai1, Kun-Qian Li1, Yue-Yang Zhai1**, Wei Xia2, Qing Wang1, Wei Xiong1, Xiang-Hui Qi1, Xu-Zong Chen1** |
1Institute of Quantum Electronics, School of Electronics Engineering and Computer Sciences, Peking University, Beijing 100871
2Jiangsu Key Laboratory on Opto-electronic Technology, School of Physics and Technology, Nanjing Normal University, Nanjing 210046
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| Cite this article: |
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Shao-Yang Dai, Kun-Qian Li, Yue-Yang Zhai et al 2017 Chin. Phys. Lett. 34 013201 |
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Abstract The optical frequency comb has been widely used in precision measurement. In this study, a multi-peak fitting approach is first proposed to fit the two-photon transition spectrum which overlaps with the neighboring transition in $^{87}$Rb. The multi-peak fitting approach is used to eliminate the frequency shift affected by the neighboring transition. With locking the carrier envelope offset frequency at 1/4 repetition frequency, the transition frequency is measured to be 770569132739.9$\pm$5.8 kHz, which agrees well with the previous result recommended by Comité International des Poids et Mesures.
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Received: 24 August 2016
Published: 29 December 2016
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| PACS: |
32.10.Fn
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(Fine and hyperfine structure)
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32.30.Jc
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(Visible and ultraviolet spectra)
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32.70.Jz
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(Line shapes, widths, and shifts)
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 91336103, 10934010 and 61078026. |
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