Chin. Phys. Lett.  2014, Vol. 31 Issue (12): 123201    DOI: 10.1088/0256-307X/31/12/123201
ATOMIC AND MOLECULAR PHYSICS |
Observation of Spin Polarized Clock Transition in 87Sr Optical Lattice Clock
WANG Qiang1,2**, LIN Yi-Ge1, LI Ye1,2, LIN Bai-Ke1,2, MENG Fei1, ZANG Er-Jun1, LI Tian-Chu1, FANG Zhan-Jun1
1National Institute of Metrology, Beijing 100013
2Department of Precision Instrument, Tsinghua University, Beijing 100084
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WANG Qiang, LIN Yi-Ge, LI Ye et al  2014 Chin. Phys. Lett. 31 123201
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Abstract We report our observation of the spin polarized 1S03P0 clock transition spectrum in an optical lattice clock based on fermionic 87Sr. The atoms are trapped and pre-cooled to about 2 μK with two stages of laser cooling at 461 nm and 689 nm, respectively. Then the atoms are loaded into an optical lattice formed by the interference of counter-propagating laser beams at 813 nm. An external cavity diode laser at 698 nm, which is stabilized to a high finesse cavity with a linewidth of about 5 Hz and a drift rate of less than 0.2 Hz/s, is used to excite the atoms to the 3P0 state. The π-polarized clock transition spectrum of resolvable mF states is obtained by applying a small bias magnetic field along the polarization axis of the probe beam. A spin polarized clock transition spectrum as narrow as 10 Hz with an 80 ms probe pulse is obtained.
Published: 12 January 2015
PACS:  32.30.Jc (Visible and ultraviolet spectra)  
  32.70.Jz (Line shapes, widths, and shifts)  
  37.10.Gh (Atom traps and guides)  
  37.10.Jk (Atoms in optical lattices)  
  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/31/12/123201       OR      https://cpl.iphy.ac.cn/Y2014/V31/I12/123201
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WANG Qiang
LIN Yi-Ge
LI Ye
LIN Bai-Ke
MENG Fei
ZANG Er-Jun
LI Tian-Chu
FANG Zhan-Jun
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