北京大学学报（自然科学版）

铟离子5s21S0-5s5p3P0参考用跃迁频率的精密测量

王延辉1,2,刘涛2,A.Stejskal2,赵燕宁2,R.Dumke2,3,张洁2,陆泽晃2,王力军1,2,董太乾1   

  1. 1北京大学信息科学技术学院，量子信息与测量教育部重点实验室，北京100871；2Max-Planck Research Group, Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, Erlangen Germany 91058； 3Nanyang Technological University, Singapore 637616；
  • 收稿日期:2007-06-14 出版日期:2008-07-20 发布日期:2008-07-20

Absolute Frequency Measurements of the Clock Transition5s21S0-5s5p3P0 in Singly Ionized Indium

WANG Yanhui1,2 LIU Tao2 A.Stejskal2 ZHAO Yanning2 R. Dumke2,3 ZHANG Jie2 LU Zehuang2 WANG Lijun1,2， DONG Taiqian1   

  1. 1School of Electronics Engineering and Computer Science, Key Laboratory of Quantum Information and Measurements of Ministry of Education, Peking University, Beijing 100871； 2Max-Planck Research Group, Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, Erlangen Germany 91058； 3Nanyang Technological University, Singapore 637616；
  • Received:2007-06-14 Online:2008-07-20 Published:2008-07-20

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摘要： 报道了建立铟单离子(115In+)光频标实验系统的实验进展。单个离子囚禁在Paul-Straubel型离子阱中，利用激光边带冷却技术将其冷却至最低振动能态。为了探测和测量铟离子参考用跃迁5s21S0-5s5p3P0的频率，使用一台Hz量级超窄线宽激光作为探测激光，用以获得量子跳跃信号。用一台以商用铯原子钟为基准的飞秒光频梳作为测量工具，对其频率进行了20次的精密测量，相对不确定度为5.0×10-14。

关键词: 单离子, 绝对频率测量, 飞秒光频梳

Abstract: The authors report on the current status of the optical frequency standard based on a single 115In+ ion. A single Indium ion is trapped in a Paul-Straubel type trap and cooled by sideband cooling to its lowest vibrational states. To interrogate the 5s21S0-5s5p3P0 clock transition with high accuracy, the authors demonstrate a Hz-level level laser system resonant to this transition. The Absolute frequency measurement is performed with the help of a femtosecond laser referenced to a commercial cesium atomic clock. 20 sessions measurements are achieved. The relative fractional uncertainty is 5.0×10-14.

Key words: single ion, absolute frequency measurement, femtosecond laser

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