空间超冷原子实验两维磁光阱系统的集成设计与实现  

Integrated Design and Realization of Two-Dimensional Magneto-Optical Trap for Ultra-Cold Atomic Physics Rack in Space

作　　者：李文文 刘乾 梁昂昂 谢昱 李琳[1,3] 李蕊 孟洁[2] 潘太军 汪斌 许忻平[2] 王文丽[2] Li Wenwen;Liu Qian;Liang Ang’ang;Xie Yu;Li Lin;Li Rui;Meng Jie;Pan Taijun;Wang Bin;Xu Xinping;Wang Wenli(Key Laboratory of Quantum Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Spaceborne Laser Engineering Department,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]中国科学院上海光学精密机械研究所量子光学重点实验室,上海201800 [2]中国科学院上海光学精密机械研究所航天激光工程部,上海201800 [3]中国科学院大学材料科学与光电技术学院,北京101408

出　　处：《中国激光》2022年第11期187-196,共10页Chinese Journal of Lasers

基　　金：国家自然科学基金(U1730126);中国科学院青年创新促进会。

摘　　要：介绍了一种应用于空间超冷原子物理实验平台的二维磁光阱光机系统的集成优化设计方法,可获得高通量冷原子束流以满足后续三维磁光阱中冷原子的高装载率。二维磁光阱激光系统的主要光路包括冷却光、重泵光、推送光和缓冲光。首先,利用Zemax软件对光学系统进行设计和优化,使得成像系统的点列图均方根(RMS)半径均小于艾里斑,而且光学系统的调制传递函数(MTF)与衍射极限传递函数非常接近,系统具备优良的光学性能。在此基础上,利用Solidworks软件仿真完成了高稳定度、简单化、小型化光机结构的设计。针对4路光同时输入一个光机口的难题,提出了V-GROOVE光纤设计方案,进一步提高了所有光机组件的集成度。该系统在工程化的基础上实现了装载率约为1.89×10^(8)/s的连续冷原子束流。Objective An optical system is one of the key systems of the space ultra-cold atomic physics experimental platform for laser cooling,state preparation and detection of atoms,as well as evaporative cooling and deep cooling experiments based on optical traps.The optical system is mainly composed of laser,optical platform and optical-mechanical system.The optical-mechanical system is a key component installed in the physical subsystem for shaping,alignment,imaging,and polarization control of the incident laser.In this paper,a two-dimensional(2 D)magneto-optical trap(MOT)optical-mechanical system of the space ultra-cold atomic physics experimental platform is proposed for the preparation and pre-cooling of ultra-cold atoms.The main purpose is to generate a high-flux cold atomic beam through two-dimensional magneto-optical trap(2 D-MOT)lateral pre-cooling and thus to improve the atomic loading rate of a three-dimensional magneto-optical trap(3 D-MOT).Methods The laser system of our quasi-2D MOT includes cooling beams,repumping beams,push beam,and buffer beam.To ensure an excellent optical performance,the Zemax software is applied to design and optimize this optical system with the root mean square(RMS)radius of the point diagram of the imaging system less than that of Airy spot and the modulation transfer function(MTF)of the optical system very close to the diffraction limit transfer function.Further,the Solidworks software is used to complete the simulation design of the miniaturized optical-mechanical structure with a high stability performance.We also propose a V-GROOVE optical fiber design scheme to let four-way beams input into one optical port at the same time,which further improves the integration of all optical components.Results and Discussions In this paper,the optical design software Zemax is used to simulate the optical path required by a 2D-MOT for the optical-mechanical system of the space ultra-cold atomic physics experimental platform.From the footprint diagram,it can be seen that the light spot size o

关 键 词：量子光学 二维磁光阱 激光冷却 原子装载 Zemax软件 SOLIDWORKS软件 

分 类 号：O439[机械工程—光学工程]