Acta Optica Sinica, Volume. 43, Issue 19, 1914002(2023)
Laser Frequency Shift and Stabilization of Atomic Fountain Based on Electro-Optic Modulation
Fig. 1. Experimental setup. (a) Schematic diagram of frequency shift device; (b) physical image of large aperture saturated absorption optical path
Fig. 4. Relationsheep between saturated absorption signal and spot diameter. (a) Changes of transition signal with spot diameter; (b) changes of SNR of saturated absorption signal stripe with spot diameter; (c) relationsheep between saturated absorption error signal and laser power when spot diameters are 3 mm and 8 mm, respectively; (d) changes of error signal slope with laser power
Fig. 5. Saturated absorption signals before and after modulation. (a) Signal before modulation; (b) signal after modulation; (c) signal with increased spot diameter after modulation; (d) error signal after modulation
Fig. 7. Change of signal with time during frequency stabilization. (a) Saturation absorption error signal (illustration: acquisition error signal) (Note: error signal after locking slightly deviates from 0 is due to small gain of laser locking control system, which does not affect normal operation of experiment); (b) number of atoms falling into detection zone
Fig. 8. Main optical link of atomic fountain clock. (a) Optical path; (b) all fiber link
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Weijing Zhao, Yao Li, Richang Dong, Rong Wei. Laser Frequency Shift and Stabilization of Atomic Fountain Based on Electro-Optic Modulation[J]. Acta Optica Sinica, 2023, 43(19): 1914002
Category: Lasers and Laser Optics
Received: Mar. 1, 2023
Accepted: Apr. 26, 2023
Published Online: Oct. 23, 2023
The Author Email: Rong Wei (weirong@siom.ac.cn)