Controlling the gain shape of Er3+-doped fluorozirconate fibre amplifier by a coherent field

• 来源期刊: 中国物理（英文版）
• 关键词: electromagnetically induced transparency erbium-doped fibre amplifiers
• 年，卷（期）: 2003,（2）
• 页码范围: 178-183
• 页数: 6页
• 语种: 英文

摘要

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.