Doppler-free spectroscopy in driven three-level systems
- 101 Downloads
We demonstrate two techniques for studying the features of three-level systems driven by two lasers (called control and probe), when the transitions are Doppler broadened as in room-temperature vapor. For \(\Lambda\)-type systems, the probe laser is split to produce a counter-propagating pump beam that saturates the transition for the zero-velocity atoms. Probe transmission then shows Doppler-free peaks which can even have sub-natural linewidth. For V-type systems, the transmission of the control beam is detected as the probe laser is scanned. The signal shows Doppler-free peaks when the probe laser is resonant with transitions for the zero-velocity group. Both techniques greatly simplify the study of three-level systems since theoretical predictions can be directly compared without complications from Doppler broadening and the presence of multiple hyperfine levels in the spectrum.
KeywordsPump Beam Rabi Frequency Probe Laser Control Beam Doppler Width
Unable to display preview. Download preview PDF.
- 10.G.S. Agarwal, Phys. Rev. A 54, R3734 (1996)Google Scholar
- 15.W. Demtröder, Laser Spectroscopy (Springer-Verlag, Berlin, 1982)Google Scholar
- 16.G.S. Agarwal, private communicationGoogle Scholar
- 17.Conetic AA Alloy, Magnetic Shield Division, Perfection Mica Co., USAGoogle Scholar
- 18.The separation and linewidth of the two peaks are obtained by fitting to the spectrum with an underlying Doppler profileGoogle Scholar