College of Physics, Jilin University, Changchun 130023, China; Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Changchun 130023, China
Abstract We proposed a four-level system to explore the quantum interference effects on optical amplification. We found that the gain of the probe, including positions and values of gain peaks, can be adjusted by changing the coherent field and the incoherent pumping. At the same time, we can also modify the absorption profile of electromagnetically induced transparency by the incoherent pump. The results provide a method to flatten the gain of Erbium-doped fibre amplifiers.
Received: 09 July 2002
Revised: 11 October 2002
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60078015), and by the Doctoral Program Foundation of Institutions of Higher Education of China (Grant No 19201038).
Cite this article:
Zhang Hui-Fang (张惠芳), Wu Jin-Hui (吴金辉), Gao Jin-Yue (高锦岳) Controlling the gain shape of Er3+-doped fluorozirconate fibre amplifier by a coherent field 2003 Chinese Physics 12 178
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