Abstract
Coherence effects in driven three-level atomic systems have potential applications in the generation of short-wavelength coherent radiation, particle acceleration, and sensitive measurements of magnetic fields.1 In recent experiments,2 gain and lasing have been observed from atoms with significantly less population in the excited state than would normally be required in a two-level system. We report here measurements of electromagnetically induced transparency (EIT) in a sample of cold trapped Rb87 atoms. By using cold atoms, we avoid complications associated with Doppler broadening, which often exist in similar experiments performed with room-temperature vapors.
© 1998 Optical Society of America
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