Abstract
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 transition we have determined a new value of the fine-structure splitting, 1028±0.4 MHz.
- Received 11 January 1978
DOI:https://doi.org/10.1103/PhysRevLett.40.847
©1978 American Physical Society