Amplification mechanism and effects of spontaneously generated coherence on the probe gain in a four-level system |
| |
Authors: | Xu Wei-Hu Wu Jin-Hui Gao Jin-Yue |
| |
Affiliation: | College of Physics, Jilin University, Changchun 130023, China |
| |
Abstract: | We investigate the amplification mechanism in a four-level system by both the density-matrix and quantum-jump approaches. We show that the asymmetry between three-photon stimulated emission and one-photon absorption process is responsible for the inversionless amplification of the probe field. We also investigate the effects of spontaneously generated coherence (SGC) on the probe gain, and find that due to the SGC, the probe gain can be greatly enhanced and can be modulated by changing the relative phase between the applied fields. |
| |
Keywords: | quantum-jump spontaneously generated coherence |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理》浏览原始摘要信息 |
|
点击此处可从《中国物理》下载免费的PDF全文 |