多模1064nm光纤激光器实现一维远失谐光晶格  

One-dimensional far-detuned optical lattice realized with a multimode 1064 nm laser

作　　者：袁园[1,2] 芦小刚[1] 白金海[1] 李建军[1] 吴令安[1] 傅盘铭[1] 王如泉[1] 左战春[1] 

机构地区：[1]中国科学院物理研究所,北京凝聚态物理国家实验室,北京100190 [2]河北师范大学物理科学与信息工程学院,石家庄050000

出　　处：《物理学报》2016年第4期46-52,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11274376;61308011;11204011);国家重点基础研究发展计划(批准号:2013CB922002;2010CB922904)资助的课题~~

摘　　要：采用1064 nm多模30 W连续光纤激光器,搭建了一个周期为25μm的一维远失谐光学晶格势场.对铷原子进行磁光阱装载和偏振梯度冷却,实现了铷冷原子团在光晶格中的装载.借助于短程飞行时间法,测量晶格中冷原子温度为20μK,为下一步实现量子信息存储实验奠定了基础.For a quantum memory to be useful as a quantum repeater, a long coherence time is a crucial requirement. In recent years, the most commonly explored medium for quantum storage has been atomic gases. We report an experiment to realize a quantum memory based on an Rb atomic ensemble in a one-dimensional far-detuned optical lattice. A multimode 30 W continuous wave fiber laser was used to construct a travelling wave lattice with a period of 25 μm. The Rb atoms were loaded into a magneto-optical-trap, which was then adjusted to optimize the polarization gradient cooling. To trap the cooled atoms, we turned on a laser which has a wavelength of 1064 nm and therefore is red-detuned from the resonance frequencies of D1 and D2 transitions of 87Rb atoms. By taking the short-distance time-of-flight image the temperature of the atoms was found to be about 20 μK. This system will provide a foundation for future quantum information storage studies.

关 键 词：多模激光器 冷原子 磁光阱 光学晶格 

分 类 号：TN248[电子电信—物理电子学]