Sub-Doppler and sub-natural narrowing of an absorption line

N. Gavra, M. Rosenbluh, T. Zigdon, A. D. Wilson-Gordon, H. Friedmann

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We experimentally demonstrate the double dark resonance windows characteristic of a four level tripod system such as the D2 line of 87Rb where the Fg = 1, mg = -1, 0, 1 Zeeman sublevels form the bottom three levels and the Fe = 0 state is the upper level. Between the double dark resonance windows, a very narrow absorption resonance is observed whose line-width is shown to be sub-Doppler and sub-natural. The sharp absorptive resonance is characterized as a function of applied magnetic field and pump laser power.

Original languageEnglish
Pages (from-to)374-378
Number of pages5
JournalOptics Communications
Issue number2
StatePublished - 15 Dec 2007


  • Atomic coherence
  • Level crossing
  • Optical pumping


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