掺杂光纤（Doped Optical Fiber）就是指向光纤纤芯掺入杂质的一种光纤。
本文重点对稀土掺杂光纤激光器与放大器进行了综述。
Recent development in rare earth doped fiber lasers and amplifiers is reviewed in this paper.
简述了稀土掺杂光纤的特性，以及三能级光纤激光放大的基本原理。
The characteristics of rare earth doped fibers and the principle of fiber amplifier with three-level system are described.
本文提出了一种利用光纤谐振环来改进现有掺杂光纤放大器系统的新型结构。
This paper presents a novel configuration of Er-doped fiber amplifier which makes using of fiber loop with resonance.
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