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A system usually characterized by electromagnetically induced absorption was investigated with a probe and a coupling laser. Properly tuning the laser polarizations and intensities, inversions in the lasers absorption were measured for the first time.
The authors presented the corresponding measurements obtained with a modified version of our heterodyne interferometer. The measurement were obtained in the 6s 2S1/2 F=4 rarr 6p 2P3/2 F=5 transition of the caesium D2 line. As it is the case for double linear polarisation the probe absorption signals showed electromagnetically induced absorption. However, the amplitude of the induced absorption peak...
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