Efficient loading of ultracold sodium atoms in an optical dipole trap from a high power fiber laser
Jing Xu(徐静)1, Wen-Liang Liu(刘文良)1,2, Ning-Xuan Zheng(郑宁宣)1, Yu-Qing Li(李玉清)1,2, Ji-Zhou Wu(武寄洲)1,2,†, Peng Li (李鹏)1, Yong-Ming Fu(付永明)1, Jie Ma(马杰)1,2, Lian-Tuan Xiao(肖连团)1,2, and Suo-Tang Jia(贾锁堂)1,2
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China; 2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract We report on a research of the loading of ultracold sodium atoms in an optical dipole trap, generated by two beams from a high power fiber laser. The effects of optical trap light power on atomic number, temperature and phase space density are experimentally investigated. A simple theory is proposed and it is in good accordance with the experimental results of the loaded atomic numbers. In a general estimation, an optimal value for each beam with a power of 9 W from the fiber laser is achieved. Our results provide a further understanding of the loading process of optical dipole trap and laid the foundation for generation of a sodium Bose-Einstein condensation with an optical dipole trap.
Fund: Project supported by the National Key R&D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grant Nos. 61722507, 61675121, 61705123, 62020106014, and 62011530047), the PCSIRT (Grant No. IRT-17R70), the 111 Project (Grant No. D18001), the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi (OIT), the Applied Basic Research Project of Shanxi Province, China (Grant Nos. 201801D221004, 201901D211191, and 201901D211188), and the Shanxi 1331 KSC.
Jing Xu(徐静), Wen-Liang Liu(刘文良), Ning-Xuan Zheng(郑宁宣), Yu-Qing Li(李玉清), Ji-Zhou Wu(武寄洲), Peng Li (李鹏), Yong-Ming Fu(付永明), Jie Ma(马杰), Lian-Tuan Xiao(肖连团), and Suo-Tang Jia(贾锁堂) Efficient loading of ultracold sodium atoms in an optical dipole trap from a high power fiber laser 2021 Chin. Phys. B 30 033701
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