Experimental Demonstration of Laser Oscillation without Population Inversion via Quantum Interference in Rb.
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Laser oscillation without population inversion is demonstrated experimentally in a V-type atomic configuration within the D1 andD2 lines of Rb vapor. It is shown that the effect is due to the atomic interference. The experimental results, as first predicted by careful theoretical analysis, are in a good agreement with detailed calculations. 1995 The American Physical Society.