Doppler-free spectroscopy in driven three-level systems

Abstract

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.

6 pages, 5 figures

References in corpus (4)

• Experimental demonstration of ground state laser cooling with electromagnetically induced transparency
• Gain Components in Autler-Townes Doublet from Quantum Interferences in Decay Channels
• Sub-natural linewidth in room-temperature Rb vapor using a control laser
• Precise measurement of hyperfine intervals using avoided crossing of dressed states

Cited by in corpus (4)

• Saturated-absorption spectroscopy: Eliminating crossover resonances using co-propagating beams
• Rubidium Pump-Probe Spectroscopy: Comparison between ab-initio Theory and Experiment
• Role of dressed-state interference in electromagnetically induced transparency
• Autler-Townes doublet in single-photon Rydberg spectra of Cesium atomic vapor with a 319 nm UV laser