Long-Distance Transmission of Cold Atomic Beams Based on Red-Detuned Gaussian Beams

Qian Liu; Yu Xie; Lin Li; Ang’ang Liang; Wenwen Li; Henan Cheng; Su Fang; Liang Liu; Bin Wang; Desheng Lü

doi:10.3788/AOS202141.2102001

Acta Optica Sinica, Volume. 41, Issue 21, 2102001(2021)

Long-Distance Transmission of Cold Atomic Beams Based on Red-Detuned Gaussian Beams

Qian Liu^1,2, Yu Xie^1,2, Lin Li^1,2, Ang’ang Liang^1,2, Wenwen Li^1,2, Henan Cheng^1,2, Su Fang¹, Liang Liu^1、***, Bin Wang^1、**, and Desheng Lü^1、*

Author Affiliations

¹Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100000, China

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Figures & Tables(7)

Fig. 1. 2D-ODT MOT schematic

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Fig. 2. Particle trajectories in 2D MOT. (a) 2D MOT without Gaussian light in axial direction; (b) 2D MOT with Gaussian light in axial direction

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Fig. 3. Experimental results. (a) Normalized number of atoms entering differential pumping stage at different detuning of Gauss beam; (b) axial temperature of atomic beams at different detuning of Gauss beam; (c) radial temperature of atomic beams at different detuning of Gauss beam; (d) normalized number of atoms entering differential pumping stage at different power of Gauss beam; (e) axial temperature of atomic beams at different power of Gauss beam; (f) radial temperature of atomic beams at different power of Gauss beam

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Fig. 4. Schematic of cold atomic loading experiment

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Fig. 5. Measurement data of MOT loading in science chamber

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Table 1. Simulated results under four experimental conditions
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Table 1. Simulated results under four experimental conditions
Parameter No beam Push beam Gauss beam Gauss+push beam
Normalized number of atoms 0.11 0.61 0.70 1.00
Radial mean velocity /(m·s^-1) 25.57 21.33 19.95 19.07
Axial mean velocity /(m·s^-1) 45.20 49.62 59.17 62.93

Table 2. Experimental results under four experimental conditions
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Table 2. Experimental results under four experimental conditions
Loading rate No beam Push beam Gauss beam Gauss+push beam
Fitting loading rate /(10⁵ atom·s^-1) 1.06 1.47 6.14 12.86
Normalized loading rate 0.08 0.11 0.48 1.00

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Qian Liu, Yu Xie, Lin Li, Ang’ang Liang, Wenwen Li, Henan Cheng, Su Fang, Liang Liu, Bin Wang, Desheng Lü. Long-Distance Transmission of Cold Atomic Beams Based on Red-Detuned Gaussian Beams[J]. Acta Optica Sinica, 2021, 41(21): 2102001

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