用于铯原子基态双光子相干操控的大失谐Raman激光系统的研究  

Study of Large Detuning Raman Laser Systems Used for Two-Photon Coherent Manipulation of the Ground State of Single Cesium Atom

作　　者：刁文婷[1] 梁强兵[1] 刘智[1] 刘贝[1] 王杰英[1] 葛玉隆[1] 何军[1] 王军民[1] 

机构地区：[1]山西大学光电研究所量子光学与光量子器件国家重点实验室,山西太原030006

出　　处：《中国激光》2013年第11期1-7,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61078051;11274213;61205215;11104172;61227902);国家自然科学基金创新群体项目(61121064);国家重大科学研究计划(2012CB921601);山西省回国留学人员科研经费(2012-015);山西省太原市科技明星专项(12024707)

摘　　要：详细介绍了两套频差为9.2GHz且相位锁定的Raman激光系统的产生方法、判定方法、优缺点及其在铯原子基态相干操控中的应用。通过饱和吸收谱和法布里-珀罗腔的透射信号初步判断两束相位相干光频率差,通过拍频实验进一步证实了两束相干光的频率的相对稳定度。利用自由光谱区约为18.4GHz的控温标准具把激光器锁定在相对于铯原子D2跃迁线负失谐约为10GHz的频率上,实现了相位相干光的大频差锁定。实验上实现了单个铯原子在磁光阱(MOT)和偶极力阱(FORT)中基态超精细态的制备和检测。利用上述系统完成单个铯原子基态的任意相干叠加态的制备,从而实现量子比特。Two laser systems that can be used in coherent manipulation of the ground states of cesium （Cs） atoms with the frequency difference of 9.2 GHz are studied. The advantages and disadvantages of two laser systems are analyzed. The frequency difference of the two lasers is approved by saturated absorption spectroscopy or Fabry-Perot cavity, and the relative frequency stabilization of coherent laser beams is also analyzed by the beat-note signal. Using the temperature controlled etalon with free spectral range of 18.4 GHz, the laser can be locked to about 10 GHz negative detuning from the D2 transmission line of cesium atoms, which realizes a large frequency difference lock of phase coherent light. The single cesium atom trapped in the magneto-optcial trap （MOT） and the far-off-resonance optcial dipole trap （FORT） is already prepared and dectected in the hyperfine states experimentally. Raman laser system can be applied to the single atom to realize the coherent manipulation of the ground state of single cesium atom.

关 键 词：量子光学 相位锁定的Raman光 光学注入锁定 半导体激光器 受激拉曼绝热过程 量子比特 

分 类 号：O431.2[机械工程—光学工程] O562[理学—光学]