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Gain properties in a four-level system with a closed interaction contour |
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| Authors: | Y?Xue G?Wang H-F?Zhang |
| Institution: | (1) College of physics, Jilin University, Changchun, 130023, P.R. China;(2) Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Educational Ministry of China, Changchun, P.R. China;(3) CCAST (World Laboratory), P.O. Box 8370, Beijing, 100080, P.R. China |
| Abstract: | We propose a novel scheme for light amplification and gain equalization by quantum interference. We find that the laser amplification can be observed at three specific probe frequencies in a four-level system. Furthermore, we show that three gain peaks can be combined into one to obtain gain equalization. |
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