Jingwei Ji, Henan Cheng, Zhen Zhang, Kangkang Liu, Jingfeng Xiang, Wei Ren, Lin Li, Desheng Lü. Automatic Laser Frequency Stabilization System for Transportable 87Rb Fountain Clock[J]. Acta Optica Sinica, 2020, 40(22): 2214002
- Acta Optica Sinica
- Vol. 40, Issue 22, 2214002 (2020)
Fig. 1. Schematic of laser automatic frequency stabilization system
Fig. 2. Flow chart of laser automatic frequency stabilization
Fig. 3. Flow chart of dual feedback PZT
Fig. 4. Variance of saturated absorption signal during lock loss and re-lock of laser
Fig. 5. Saturated absorption curve and error signal curve during peak search. (a) Saturation absorption curve; (b) error signal curve
Fig. 6. Variance of saturated absorption signal with time during closed-loop operation of fountain atomic clock
Fig. 7. Error signal during frequency stabilization
Fig. 8. Laser frequency stability
Fig. 9. Closed-loop results of fountain atomic clock in Shanghai and Beijing
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Table 1. Variance of PZT setting value with number of scans
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