Coherent Two-Photon Spectroscopy of Atoms and Ions by Means of Picosecond Pulses

Naohiro Tanno, Yoshio Adachi, Kenichi Yokoto +1 more

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

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 $3s\ensuremath{-}4d$ transition we have determined a new value of the $4d$ fine-structure splitting, 1028\ifmmode\pm\else\textpm\fi{}0.4 MHz.

M. P. McCann, C. H. Chen, Marvin G. Payne

Rainer Salomaa, Stig Stenholm

A. I. Ferguson, Robert Anthony Taylor

The use of picosecond pulse trains in performing high resolution atomic spectroscopy is described. Methods which rely in producing Hertzian coherence and optical coherence in atoms are compared and contrasted.

H. Harde, H. Burggraf