High-resolution two-photon spectroscopy with picosecond light pulses

J. N. Eckstein, A. I. Ferguson, T. W. Hänsch

Research output: Contribution to journalArticlepeer-review


We have demonstrated the feasibility of Doppler-free two-photon spectroscopy with a train of picosecond standing-wave light pulses from a synchronously pumped mode-locked cw dye laser. The actively controlled mode spectrum provides a means for accurate measurements of large frequency intervals. From a multipulse spectrum of the sodium 3s-4d transition we have determined a new value of the 4d fine-structure splitting, 1028±0.4 MHz.

Original languageEnglish (US)
Pages (from-to)847-850
Number of pages4
JournalPhysical review letters
Issue number13
StatePublished - 1978
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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