For erbiumion in light-emitting layer with light activated process and other chemical reaction, it is necessary to anneal the devise with high temperature in fabrication process.
为了让发光层内铒离子具有光活化及其他的化学反应的发生，在制程中热退火是必须的。
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We demonstrate a multi-wavelength erbium-doped fiber laser (EDFL) using erbium gain and four-wave mixing (FWM) effect in a piece of erbium-doped fiber (EDF) with high erbiumion concentration.