Chin. Phys. Lett.  1998, Vol. 15 Issue (6): 420-422    DOI:
Original Articles |
Ultrafast Modulation Spectroscopy in Four-Level System
YU Zu-he;MI Xin;JIANG Qian;LI Xiao-feng;FU Pan-ming
Laboratory of Optical Physics, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
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YU Zu-he, MI Xin, JIANG Qian et al  1998 Chin. Phys. Lett. 15 420-422
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Abstract Based on the interference between two two-photon processes, we reported a four-level ultrafast modulation spectroscopy in Na vapor, where 3S, 3P, 5S, and 4D formed a four-level system. We studied the temporal behavior of the four-wave mixing signal intensity and obtained signal modulation with period 25fs, corresponding to the splitting between 5s and 4D. This technique can achieve Doppler-free precision in the measurement of the energy level splitting between two excited states which are dipolar forbidden from the ground state.
Keywords: 42.65.Hw      32.90.+a     
Published: 01 June 1998
PACS:  42.65.Hw (Phase conjugation; photorefractive and Kerr effects)  
  32.90.+a (Other topics in atomic properties and interactions of atoms with photons)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1998/V15/I6/0420
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YU Zu-he
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