Doppler-free spectroscopy in driven three-level systems

Details Doppler-free spectroscopy in driven three-level systems Doppler-free spectroscopy in driven three-level systems

2005-10-11

arxiv.org/abs/physics/0510088v1

Eur. Phys. J. D 28, 317-322 (2004)

Physics

Optics

6 pages, 5 figures

Scientific paper

10.1140/epjd/e2003-00319-x

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.

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