• Acta Optica Sinica
  • Vol. 19, Issue 4, 445 (1999)
[in Chinese]1, [in Chinese]1, and [in Chinese]2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    [in Chinese], [in Chinese], [in Chinese]. Polarization Beats in a Four-Level System[J]. Acta Optica Sinica, 1999, 19(4): 445 Copy Citation Text show less

    Abstract

    Based on the interference between two-photon and two-photon processes, we have studied the ultrafast modulation spectroscopy(UMS) in a four-level system. The possibility of using UMS in a four-level system to measure the energy difference with Doppler-free precision has been demonstrated.